Настройки

Укажите год
-

Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

Подробнее
-

Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 7710. Отображено 100.
09-02-2012 дата публикации

Phosphor, production method thereof and light emitting instrument

Номер: US20120032579A1
Автор: Naoto Hirosaki
Принадлежит: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

A light emitting element includes a light-emitting source for emitting light at a wavelength of 330 to 500 nm and a constituent phosphor. The constituent phosphor includes a compound including M, A, Al, O, and N, where M is at least one kind of element selected from Mn, Ce, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb, and A is at least one kind of element selected from C, Si, Ge, Sn, B, Ga, In, Mg, Ca, Sr, Ba, Sc, Y, La, Gd, Lu, Ti, Zr, Hf, Ta, and W.

Подробнее
Номер записи: 1
22-03-2012 дата публикации

Dc-driven electroluminescence device and light emission method

Номер: US20120068620A1
Автор: Takuyoshi Ishimura
Принадлежит: Kobundo Printing Co Ltd

An inorganic electroluminescence device has a structure including a phosphor layer sandwiched between a first electrode and a second electrode; and a semiconductor structure in which N-type semiconductors and a P-type semiconductor, made of inorganic semiconductor materials, are joined to form an NPN type structure. The phosphor is made of an inorganic substance. The first electrode is to be a cathode and is formed on an insulating glass substrate. The second electrode is to be an anode and is disposed opposite the first electrode. The semiconductor structure is disposed between the cathode that is the first electrode and the phosphor layer.

Подробнее
Номер записи: 2
24-05-2012 дата публикации

Crystal Growth Atmosphere For Oxyorthosilicate Materials Production

Номер: US20120126171A1
Автор: A. Andrew Carey, Mark S. Andreaco, Piotr Szupryczynski
Принадлежит: Siemens Medical Solutions USA Inc

A method of growing a rare-earth oxyorthosilicate crystal, and crystals grown using the method are disclosed. The method includes preparing a melt by melting a first substance including at least one first rare-earth element and providing an atmosphere that includes an inert gas and a gas including oxygen.

Подробнее
Номер записи: 3
24-05-2012 дата публикации

Lamp for incandescent-like color quality

Номер: US20120126685A1
Автор: Istváná Károly Deme, Katalin Toth
Принадлежит: General Electric Co

A low pressure discharge lamp comprises a phosphor composition configured to provide a total light emission having characteristics within specified parameters, including color point above or substantially on the Planckian locus in the CIE standard chromaticity diagram; CCT of from about 2500 kelvin to about 3600 kelvin; general color rendering index Ra(8) of at least about 80; and special color rendering index R′a(14) of from about 72 to about 87. These novel lamps result in incandescent-like color quality while also having favorable efficacy. Also disclosed are phosphor blends which enable the achievement of such lamps.

Подробнее
Номер записи: 4
05-07-2012 дата публикации

Phosphor for Scintillator

Номер: US20120168678A1
Автор: Hiromu Watanabe, Motoyuki Tanaka, Shunichi Hatamoto, Tsukasa Takahashi
Принадлежит: Mitsui Mining and Smelting Co Ltd

Provided is a phosphor for scintillator that can absorb radiation and convert it into visible light, and which has a short fluorescence decay time. The phosphor contains a lutetium sulfide-containing host material and an activator agent ion, for example, a phosphor comprising a composition represented by the general formula (Lu 1-x Pr x ) 2 S 3 , or (Lu 1-x Ce x ) 2 S 3 .

Подробнее
Номер записи: 5
23-08-2012 дата публикации

Thermoelectric conversion material and its manufacturing method, and thermoelectric conversion device using the same

Номер: US20120211045A1
Автор: Cheol-Hee Park, Se-Hui Sohn, Seung-Tae Hong, Tae-hoon Kim, Won-Jong Kwon
Принадлежит: LG Chem Ltd

Disclosed is a new thermoelectric conversion material represented by the chemical formula 1: Bi 1-x Cu 1-y O 1-z Te, where 0≦x<1, 0≦y<1, 0≦z<1 and x+y+z>0. A thermoelectric conversion device using said thermoelectric conversion material has good energy conversion efficiency.

Подробнее
Номер записи: 6
30-08-2012 дата публикации

Luminophore composition for low pressure discharge lamps

Номер: US20120217866A1
Автор: Armin Konrad, Claudia Held, Nina Goebel
Принадлежит: OSRAM GMBH

In various embodiments, a luminophore composition for low pressure discharge lamps for generating radiation with a color temperature of greater than 4800 K having a very good general color rendering index of greater than 90, the luminophore composition including at least one halophosphate luminophore, a luminophore emitting in the red wavelength region, a luminophore emitting in the blue-green wavelength region, a europium-doped luminophore emitting in the blue wavelength region and a Tb-doped luminophore emitting in the green wavelength region, wherein the luminophore composition includes a luminophore emitting in an emission range in the visible region with wavelengths of greater than 380 nm and at least one emission band in the near ultraviolet and that the emitted intensity of the luminophore is smaller in the visible region than in the near ultraviolet region.

Подробнее
Номер записи: 7
06-09-2012 дата публикации

Phosphor and led light emitting device using the same

Номер: US20120223352A1
Автор: Hajime Takeuchi, Katsutoshi Nakagawa, Ryo Sakai, Tsutomu Ishii, Yasuhiro Shirakawa, Yasumasa Ooya, Yoshitaka Funayama, Yumi Ito
Принадлежит: Toshiba Corp, Toshiba Materials Co Ltd

An LED light emitting device is provided that has high color rendering properties and is excellent color uniformity and, at the same time, can realize even luminescence unattainable by conventional techniques. A phosphor having a composition represented by formula: (Sr 2-X-Y-Z-ω Ba X Mg Y Mn Z Eu ω )SiO 4 wherein x, y, z, and u are respectively coefficients satisfying 0.1<x<1, 0<y<0.5, 0<z<0.1, y>z, and 0.01<ω<0.2. is provided. The phosphor is used in combination with ultraviolet and blue light emitting diodes having a luminescence peak wavelength of 360 to 470 nm to form an LED light emitting device.

Подробнее
Номер записи: 8
25-10-2012 дата публикации

Light-emitting device, white light-emitting device, illuminator, and image display

Номер: US20120267997A1
Автор: Hideaki Kaneda, Kimiya Takeshita, Naoto Kijima, Yasuo Shimomura
Принадлежит: Mitsubishi Chemical Corp

To achieve a light-emitting device emitting light with high brightness, closer to natural light, and less color shift due to a small change in intensity of emitted light, in a light-emitting device including a light source emitting light by driving current and at least one wavelength-converting material absorbing at least part of the light from the light source and emitting light having a different wavelength, the color coordinate x 1 (17.5) and the color coordinate y 1 (17.5) of the light emitted at a driving current density of 17.5 A/cm 2 and the color coordinate x 1 (70) and the color coordinate y 1 (70) of the light emitted at a driving current density of 70 A/cm 2 satisfy the following Expressions (D) and (E): −0.006≦ x 1 (17.5)− x 1 (70)≦0.006  (D), −0.006≦ y 1 (17.5)− y 1 (70)≦0.006  (E).

Подробнее
Номер записи: 9
01-11-2012 дата публикации

Silicate luminescent material and its preparation method

Номер: US20120273727A1
Автор: Chaopu Shi, Mingjie Zhou, Rong Wang, Wenbo Ma
Принадлежит: Oceans King Lighting Science and Technology Co Ltd

Silicate luminescent material and preparation method thereof are provided. The structural formula of the silicate luminescent material is Zn 2-y (Si 1-x M x )O 4 :Mn y , wherein M is metal element and its oxide is conductive, x is in a range of 0.001 to 0.15, and y is in a range of 0.001 to 0.05. For integrated with conductive metal oxide component, the silicate luminescent material could take advantage of its conductive properties, and the silicate luminescent material could improve the luminescence properties under cathode ray significantly comparing with that of the luminescent material has not been integrated with conductive component. Accordingly, the luminescence efficiency of the above silicate luminescent material is increased.

Подробнее
Номер записи: 10
15-11-2012 дата публикации

Luminescent material

Номер: US20120286207A1
Автор: Chung-Hoon Lee, Gundula Roth, Walter Tews
Принадлежит: Seoul Semiconductor Co Ltd

A luminescent material is disclosed. The luminescent material may include a first compound having a host lattice comprising first ions and oxygen. A first portion of the first ions may be substituted by copper ions. In one embodiment, the host lattice may include silicon, the copper ions may be divalent copper ions and the first compound may have an Olivine crystal structure, β-K 2 SO 4 crystal structure, a trigonal Glaserite (K 3 Na(SO 4 ) 2 ) or monoclinic Merwinite crystal structure, a tetragonal Ackermanite crystal structure, a tetragonal crystal structure or an orthorhombic crystal structure. In another embodiment, the copper ions do not act as luminescent ions upon excitation with the ultraviolet or visible light.

Подробнее
Номер записи: 11
13-12-2012 дата публикации

Scintillator plate

Номер: US20120313013A1
Автор: Manfred Fuchs, Martina Hausen
Принадлежит: SIEMENS AG

A scintillator plate has a radiation-permeable substrate on which is applied a scintillator layer made of copper iodide that is formed from spicular crystals. The scintillator layer has an emission maximum in the red spectral range. The scintillator layer of the scintillator plate has a high emission power in the near-infrared range.

Подробнее
Номер записи: 12
03-01-2013 дата публикации

White light emitting lamp and white led lighting apparatus including the same

Номер: US20130001628A1
Автор: Daichi Usui, Masahiko Yamakawa, Yasuhiro Shirakawa
Принадлежит: Toshiba Materials Co Ltd

An object is to provide a white light emitting lamp 1 comprising: a semiconductor light emitting element 2 which is placed on a board 3 and emits ultraviolet light or blue light; and a light emitting portion that is formed so as to cover a light emitting surface of the semiconductor light emitting element 2 , the light emitting portion containing a blue phosphor B, a green phosphor G, a red phosphor R and a deep red phosphor DR that are excited by the light emitted from the semiconductor light emitting element 2 to respectively emit blue light, green light, red light and a deep red light, the white light emitting lamp 1 emitting white light by mixing light emission colors from the blue phosphor B, the green phosphor G, the red phosphor R and a deep red phosphor DR with one another, wherein the deep red phosphor DR has a main emission peak in a longer wavelength region than a main emission peak of the red phosphor, the red phosphor R comprises at least one component selected from: a europium-activated SiAlON phosphor and a europium-activated CASN phosphor each having a predetermined composition, while the deep red phosphor DR comprises a manganese-activated magnesium florogermanate phosphor having a predetermined composition. According to the above white light emitting lamp, when the BGR phosphor is used in combination with the semiconductor element such as an LED or the like, and a deep red phosphor DR having a predetermined composition is further added in addition to the red phosphor R, so that luminance characteristics can be improved, whereby there can be provided a white light emitting lamp excellent in both high luminance and high color rendering properties.

Подробнее
Номер записи: 13
14-03-2013 дата публикации

ALUMINATE-BASED FLUORESCENT POWDER COATED BY METAL NANOPARTICLE AND PRODUCTION METHOD THEREOF

Номер: US20130062562A1
Автор: Liu Jun, Ma Wenbo, Zhou Mingjie
Принадлежит:

An aluminate-based fluorescent powder coated by metal nanoparticles. The formula thereof is (YTb)(AlGa)O@zM, in which 0 Подробнее

Номер записи: 14
21-03-2013 дата публикации

OXYHALIDE LUMINESCENT MATERIAL DOPED WITH RARE EARTH CONTAINING METAL PARTICLE AND PRODUCTION METHOD THEREOF

Номер: US20130069006A1
Автор: Liu Jun, Ma Wenbo, Zhou Mingjie
Принадлежит:

An oxyhalide luminescent material doped with rare earth containing metal particles is provided. The formula thereof is Re′Re″OX: yM, in which Re′ is the first rare earth element, Re″ is the second rare earth element, X is F, Cl or Br, M is metal nanoparticles, x is 0.001-0.15, and y is 5×10-2×10. A method for producing the luminescent material is also provided. By virtue of metal particles introduced into the oxyhalide luminescent material doped with rare earth and the surface plasma resonance effect of the metal surface, the luminescence intensity of the oxyhalide luminescent material is improved. The good stability, uniform appearance and excellent luminescence intensity of the luminescent material ensure its application in field emission devices. The production method has advantages of simplicity in operating, pollution-free, easy control, less demanding for equipment and suitability for industrialized production. 1. An oxyhalide luminescent material doped with rare earth containing metal particles , wherein said oxyhalide luminescent material doped with rare earth containing metal particles has chemical formula of Re′Re″OX: yM , wherein Re′ is the first rare earth element , Re″ is the second rare earth element; X is F , Cl or Br , M is metal nanoparticles , x is in the range of 0.001 to 0.15 , and y is in the range of 5×10-2×10.2. Oxyhalide luminescent material doped with rare earth containing metal particles as in claim 1 , wherein said first rare earth element Re′ is Y claim 1 , La or Sc claim 1 , said second rare earth element Re″ is Tm claim 1 , Tb claim 1 , Eu claim 1 , Sm claim 1 , Gd claim 1 , Dy or Ce.3. Oxyhalide luminescent material doped with rare earth containing metal particles as in claim 1 , wherein said metal nanoparticles M is Ag claim 1 , Au claim 1 , Pt or Pd metal nanoparticles.4. A production method of oxyhalide luminescent material doped with rare earth containing metal particles claim 1 , including the following steps:step 1: producing ...

Подробнее
Номер записи: 15
28-03-2013 дата публикации

HALOGEN SILICATE LUMINESCENT MATERIAL AND THE PREPARATION METHOD AND APPLICATION THEREOF

Номер: US20130075657A1
Автор: Liu Jun, Ma Wenbo, Zhou Mingjie
Принадлежит: OCEAN'S KING LIGHTING SCIENCE & TECHNOLOGY CO., LTD.

Disclosed is a halogen silicate luminescent material having a chemical structural formula of (NEuMn)SiOCl:xM, and the preparation method thereof, where M is at least one of Ag, Au, Pt and Pd, N is an alkaline earth metal and specifically at least one of Mg, Ca, Sr and Ba, 0 Подробнее

Номер записи: 16
28-03-2013 дата публикации

FLUORESCENT POWDER OF HALOGEN SILICATE CONTAINING NANO-METAL PARTICLES AND PREPARATION METHOD THEREOF

Номер: US20130075658A1
Автор: Liu Jun, Ma Wenbo, Zhou Mingjie
Принадлежит:

Provided is a fluorescent powder of halogen-silicate containing nano-metal particles with the formula of CaX.y(CaEuMnO).SiO:zM, wherein X is fluorin or/and chlorine, y is 1 or 2, z is molar ratio of nano-metal particles and fluorescent powder CaX.y(CaEuMnO).SiO, 0 Подробнее

Номер записи: 17
28-03-2013 дата публикации

SILICATE LUMINOUS MATERIAL AND PREPARATION METHOD THEREOF

Номер: US20130075661A1
Автор: Ma Wenbo, WANG Rong, Zhou Mingjie
Принадлежит: OCEAN'S KING LIGHTING SCIENCE & TECHNOLOGY CO., LTD.

Silicate luminous material and preparation method thereof are provided. The luminous material is represented by the following chemical formula: ZnSiO:Mn@SiO@M, wherein M represents at least one element selected from the group consisting of Ag, Au, Pt, Pd and Cu, and y is molar ratio of M to Si in silicate luminous materials, and 0 Подробнее

Номер записи: 18
28-03-2013 дата публикации

YTTRIUM OXIDE PHOSPHOR AND PREPARATION METHOD THEREOF

Номер: US20130075662A1
Автор: Lv Ting, Ma Wenbo, Wang Yewen, Zhou Mingjie
Принадлежит: OCEAN'S KING LIGHTING SCIENCE & TECHNOLOGY CO LTD

Fluorescent materials and preparation methods thereof are provided. The fluorescent materials are represented by the general formula: YO: Re, M, ZnAlO, wherein Re is at least one selected from Eu and Tb, M is at least one selected from Ag, Au, Pt and Pd in the form of nano-particle, and 0 Подробнее

Номер записи: 19
04-04-2013 дата публикации

Stress-sensitive material and methods for using same

Номер: US20130082191A1
Автор: Amanda Stevenson, Ashley Jones, Seetha Raghavan
Принадлежит: University of Central Florida Research Foundation Inc UCFRF

A stress-sensing material containing a matrix material and a photo-luminescent particle is disclosed, together with adhesives and coatings containing the stress-sensing material. Also disclosed are methods for preparing the stress-sensing material and measuring the stress on an article using the stress-sensing material.

Подробнее
Номер записи: 20
04-04-2013 дата публикации

STRONTIUM CERATE LUMINESCENT MATERIAL AND THE PREPARATION METHOD AND APPLICATION THEREOF

Номер: US20130082208A1
Автор: Liui Jun, Ma Wenbo, Zhou Mingjie
Принадлежит: OCEAN'S KING LIGHTING SCIENCE & TECHNOLOGY CO., LTD.

Disclosed is a strontium cerate luminescent material having a chemical formula of SrCeO:xM and comprising the luminescent material SrCeOand metal nanoparticle M, and the preparation method thereof, where M is at least one of Ag, Au, Pt and Pd, and x is a molar ratio of M to the luminescent material SrCeOand Подробнее

Номер записи: 21
04-04-2013 дата публикации

USE OF NANOPARTICLES FOR LABELLING OIL FIELD INJECTION WATERS

Номер: US20130084643A1
Автор: Aubertin Fabrice, Commarieu Annie, Crowther Nicolas, Louis Cédric, MARTINI Matteo, Perriat Pascal, Tillement Olivier
Принадлежит: TOTAL SA

The present invention relates to the development of tracer fluids, more generally, that of aqueous liquids, intended to be injected under pressure in an oil reservoir, for example from an injection well up to a production well. 1. A method of study of a solid medium (i.e. an oil reservoir) by diffusion of a fluid through said solid medium , comprising: having average dimensions comprised, in preferred ascending order, between 20 and 200 nm, 20 and 100 nm, 50 and 100 nm, 60 and 80 nm;', 'detectable by means of one or several S signals at dilutions of less than or equal to 10;', 'adapted to form a stable colloidal suspension in a saline medium;', 'at least a portion of which is constituted of a core and a coating provided with an adjustable hydrophilic-lipophilic balance (HLB) and comprising at least one organic and/or organosilicon component., 'injecting, in this solid medium (diffusion), a liquid (injection liquid) comprising a nanoparticle-based tracer;'}recovering the liquid having diffused;analyzing this liquid having diffused to measure the quantity of tracer by detection of the signal or signals S.2. A method according to claim 1 , wherein the core of the nanoparticles contains:at least one material selected from the group consisting of: the semiconductors, noble metals, fluorides, vanadates or rare earth oxides and their mixtures and/or alloys; i. luminescent entities selected from the group consisting of: the semiconductors, oxides, rare earth fluorides or vanadates, organic fluorescent molecules, transition metal ions, rare earth ions connected, or not, to complexing molecules and/or to molecules allowing for enhancing their absorption and their mixtures and/or alloys;', 'ii. optionally, other entities allowing for modifying the luminescence properties and selected from the group consisting of: noble metal particles and their mixtures and/or alloys;', 'iii. and mixtures of (i) and (ii)., 'or a matrix selected from the group of materials consisting of: ...

Подробнее
Номер записи: 22
11-04-2013 дата публикации

CERAMIC COMPOSITE FOR LIGHT CONVERSION, PROCESS FOR PRODUCTION THEREOF, AND LIGHT-EMITTING DEVICES PROVIDED WITH SAME

Номер: US20130088143A1
Автор: Iba Hisayoshi, Ichizono Yasuyuki, Ishitobi Shinichi, Miyamoto Norifumi, Ohtsubo Hideki, Sakata Shin-ichi
Принадлежит: UBE INDUSTRIES, LTD.

Provided are a ceramic composite for light conversion, which is capable of maintaining a high radiant flux even when the proportion of Gd and Ce is increased to tune the fluorescence peak wavelength to the longer wavelength side, a process for producing the ceramic composite, and a light emitting device including the ceramic composite. The ceramic composite for light conversion is a solidification product including a composition that is represented by a specific formula, and has a texture of continuously and three-dimensionally mutually entangled oxide phases including at least two phases of a first phase and a second phase, characterized in that the first phase is a YAlOfluorescent phase activated with Ce, and the second phase is an AlOphase, and the first phase and second phase account for 97% by area or more of a cross section of the solidification product, or characterized in that the first phase is a YAlOfluorescent phase activated with Gd and Ce, and the second phase is an AlOphase, and the first phase and second phase account for 97% by area or more of a cross section of the solidification product. 19-. (canceled)10. A ceramic composite for light conversion , the ceramic composite being a solidification product comprising a composition represented by the formula (1) , the composition having a texture of continuously and three-dimensionally mutually entangled oxide phases comprising at least two phases of a first phase and a second phase , characterized in that{'sub': 3', '5', '12', '2', '3, 'the first phase is a YAlOfluorescent phase activated with Ce, and the second phase is an AlOphase, and'} [{'br': None, '[Formula 1]'}, {'br': None, 'i': x', 'y', 'a', 'c, 'sub': 3/2', '3/2', '2, 'AlO-(YO-CeO)\u2003\u2003(1)'}], 'the first phase and second phase account for 97% by area or more of a cross section of the solidification product.'}(x, y, a, and c represent molar fractions, 0.770 Подробнее

Номер записи: 23
25-04-2013 дата публикации

CORE/SHELL LANTHANUM CERIUM TERBIUM PHOSPHATE, AND PHOSPHOR HAVING IMPROVED THERMAL STABILITY AND INCLUDING SAID PHOSPHATE

Номер: US20130099161A1
Автор: Buissette Valérie, Le-Mercier Thierry
Принадлежит: Rhodia Operations

A phosphate particle with a mean diameter of from 1.5 μm to 15 μm, which has an inorganic core and a shell that covers the inorganic core uniformly over a thickness of no less than 300 nm, is described. The shell can have a lanthanum cerium terbium phosphate of formula LaCeTbPO, where 0.2≦x≦0.35 and 0.19≦y≦0.22. The phosphor is produced by heat-treating a phosphate at a temperature of greater than 900° C. 1. A phosphate comprising particles having a mean diameter of from 1.5 μm to 15 μm , comprised of a mineral core and of a shell based on a lanthanum cerium terbium phosphate and homogeneously covering the mineral core over a thickness equal to or greater than 300 nm , wherein the lanthanum cerium terbium phosphate satisfies the following general formula (1):{'br': None, 'sub': (1-x-y)', 'x', 'y', '4, 'LaCeTbPO\u2003\u2003(1)'}in which x and y satisfy the following conditions:0.2≦x≦0.35, and0.19≦y≦0.22.2. The phosphate as described by claim 1 , wherein the mineral core of the particles is based on a phosphate.3. The phosphate as described by claim 1 , wherein the mineral core of the particles is based on a rare-earth phosphate.4. The phosphate as described by claim 1 , wherein the particles have a mean diameter of from 3 μm to 8 μm.5. The phosphate as described by claim 1 , wherein the mineral core has a specific surface area of at most 1 m/g.6. A phosphor comprising a phosphate as described by claim 1 , wherein the phosphor comprises a phosphate.7. A phosphor obtained by a method in which a phosphate as described by is heat-treated in a reducing atmosphere claim 1 , the heat treatment taking place in the presence claim 1 , as flux claim 1 , of lithium tetraborate (LiBO) in an amount by weight of at most 0.2% claim 1 , at a temperature of from 1050° C. to 1150° C. and over a time of from 2 hours to 4 hours.8. A method of preparing a phosphate as described by claim 1 , the method comprising:(a) gradually and continuously adding an aqueous solution of soluble ...

Подробнее
Номер записи: 24
25-04-2013 дата публикации

Doped Nanoparticles and Methods of Making and Using Same

Номер: US20130101848A1
Автор: Christopher J. Patridge, Luisa Whittaker, Peter Marley, Sarbajit Banerjee
Принадлежит: Christopher J. Patridge, Luisa Whittaker, Peter Marley, Sarbajit Banerjee

Doped nanoparticles, methods of making such nanoparticles, and uses of such nanoparticles. The nanoparticles exhibit a metal-insulator phase transition at a temperature of −200° C. to 350° C. The nanoparticles have a broad range of sizes and various morphologies. The nanoparticles can be used in coatings and in device structures.

Подробнее
Номер записи: 25
02-05-2013 дата публикации

OXIDE LUMINESCENT MATERIALS AND PREPARATION METHODS THEREOF

Номер: US20130105733A1
Автор: Lu Xinshu, Ma Wenbo, Zhou Mingjie
Принадлежит:

Oxide luminescent materials and preparation methods thereof are provided. The said luminescent materials are represented by the general formula: aReO.bSiO.cEuO.dM, wherein Re is at least one selected from Gd and Y, M is selected from metal nano-particles, (a+c):b=0.5-5, d:b=5×10-5×10, c:(a+c)=0.02-0.1. Compared to the oxide luminescent materials in the art, the said luminescent materials have higher luminescent intensity. 1. An oxide luminescent material containing a luminescent substrate and an activator and metal nano-particles , wherein the activator and the metal nano-particles are doped in the luminescent substrate , the chemical composition of the luminescent substrate is aReO.bSiO , the activator is EuO , and the chemical composition of the luminescent material is aReO.bSiO.cEuO.dM , wherein Re is Gd , Y or the combination thereof , M is a metal nano-particle , and the relationship of a , b , c , and d is: (a+c):b=0.5-5 , d:b=5×10-5×10 , c:(a+c)=0.02-0.1.2. The oxide luminescent material of claim 1 , wherein the material of the metal nano-particles is one or more selected from the group consisting of Ag claim 1 , Au claim 1 , Pt claim 1 , and Pd.3. The oxide luminescent material of claim 1 , wherein the particle size of the metal nano-particles is 5 nm-10 nm.4. A preparation method of oxide luminescent material claim 1 , comprising:a metal nano-particle sol is obtained;{'sup': −5', '−3, 'the metal nano-particle sol is added into a mixture of alcohol and water, the pH thereof is adjusted to 2-6, then a tetraethyl orthosilicate is added in such an amount that the ratio of the metal to the tetraethyl orthosilicate is in the range of 5×10:1-5×10:1, and the mixture is stirred in water bath at the temperature of 25° C.-60° C. to obtain a mixed silica sol;'}with the molar ratio of one or both selected from the group consisting of yttrium nitrate and gadolinium nitrate to europium nitrate being in the range of 0.98:0.02-0.9:0.1, a mixed nitrate solution is prepared, ...

Подробнее
Номер записи: 26
16-05-2013 дата публикации

LUMINESCENT BORATES, MATERIALS AND ARTICLES INCORPORATING SUCH BORATES, AND METHODS AND APPARATUS FOR THEIR PRODUCTION AND USE IN ARTICLE AUTHENTICATION

Номер: US20130122266A1
Автор: Kane James, Lau Carsten, Rapoport William Ross
Принадлежит: HONEYWELL INTERNATIONAL INC.

Embodiments include luminescent materials and associated production methods. The material includes a crystal borate having a first substitutable element and a second substitutable element, one or more rare earth ions substituted for the first substitutable element, and chromium substituted for the second substitutable element. The one or more rare earth ions are selected from a group consisting of neodymium and ytterbium. The material also may include a medium within which particles of the borate are incorporated. The medium, with the luminescent material particles, may form a security feature of an article. Embodiments of methods for identifying whether such a luminescent material is incorporated with an article include exposing a portion of the article to excitation in a chromium absorption band, and determining whether a detected emission produced by the article as a result of the excitation indicates an ytterbium emission after termination of the exposing step. 1. A luminescent material comprising:a borate having a crystal structure and including a first substitutable element and a second substitutable element;one or more rare earth ions substituted for the first substitutable element, wherein the one or more rare earth ions are selected from a group consisting of neodymium and ytterbium; andchromium substituted for the second substitutable element.2. The luminescent material of claim 1 , wherein the borate has a formula MeXBO claim 1 , whereinMe is the first substitutable element, which is selected from a group consisting of yttrium, lanthanum, gadolinium, lutetium, and a mixture thereof,X is the second substitutable element, which is selected from a group consisting of aluminum, scandium, and gallium,B is boron, andO is oxygen.3. The luminescent material of claim 1 , wherein the borate has the formula YAlBO claim 1 , where Y is the first substitutable element yttrium claim 1 , Al is the second substitutable element aluminum claim 1 , B is boron claim 1 , and O ...

Подробнее
Номер записи: 27
06-06-2013 дата публикации

Borate luminescent materials, preparation methods and uses thereof

Номер: US20130140492A1
Автор: Jun Liu, Mingjie Zhou, Wenbo Ma
Принадлежит: Oceans King Lighting Science and Technology Co Ltd

Borate luminescent materials, preparation methods and uses thereof are provided. The luminescent materials are represented by the general formula: (In 1-x Re x )BO 3 :zM, wherein Re is one or two selected from Tm, Tb, Eu, Sm, Gd, Dy and Ce, M is one or two selected from metal nano particles of Au, Ag, Pt or Pd, 0 <x≦ 0.5, 0 <z≦ 1×10 −2 . Compared to the luminescent materials in the prior art, the said luminescent materials have higher luminous intensity and luminous efficiency, which can be used in field emission displays or light source.

Подробнее
Номер записи: 28
20-06-2013 дата публикации

SEMICONDUCTOR NANOPARTICLE AGGREGATE AND PRODUCTION METHOD FOR SEMICONDUCTOR NANOPARTICLE AGGREGATE

Номер: US20130153837A1
Автор: Gonda Kohsuke, Hoshino Hideki, Ohuchi Noriaki, Takahashi Masaru, Takeda Motohiro
Принадлежит:

A semiconductor nanoparticle aggregate containing semiconductor nanoparticles with a core/shell structure is formed by controlling with physical energy the aggregation state of an agglomerate from agglomerated semiconductor nanoparticles. 1. A semiconductor nanoparticle aggregate containing semiconductor nanoparticles having a core/shell structure , whereinan agglomeration state of an agglomerate made by agglomerating the semiconductor nanoparticles is controlled by using physical energy, thereby forming the semiconductor nanoparticle aggregate.2. The semiconductor nanoparticle aggregate according to claim 1 , wherein a coating structure is formed so as to coat the agglomerate made by agglomerating the semiconductor nanoparticles claim 1 , thereby forming the semiconductor nanoparticle aggregate.3. The semiconductor nanoparticle aggregate according to claim 1 , wherein a raw material that configures the coating structure is hydrophilic polymer.4. The semiconductor nanoparticle aggregate according to claim 1 , wherein the raw material that configures the coating structure is polyvinyl alcohol.5. The semiconductor nanoparticle aggregate according to claim 1 , wherein a raw material that configures a shell part of the semiconductor nanoparticle having the core/shell structure is zinc sulfide (ZnS) or silicon dioxide (SiO).6. The semiconductor nanoparticle aggregate according to claim 1 , wherein a raw material that configures a core part of the semiconductor nanoparticle having the core/shell structure is a simple substance or a compound selected from a group of indium phosphide (InP) claim 1 , cadmium selenide (CdSe) claim 1 , and cadmium telluride (CdTe).7. The semiconductor nanoparticle aggregate according to claim 1 , wherein an average particle size thereof is in a range from 30 to 300 nm.8. The semiconductor nanoparticle aggregate according to claim 1 , wherein a variation coefficient of particle size thereof is in a range from 0.02 to 0.2.9. A semiconductor ...

Подробнее
Номер записи: 29
20-06-2013 дата публикации

PHOSPHOR, METHOD FOR PRODUCING THE SAME AND LIGHT-EMITTING DEVICE USING THE SAME

Номер: US20130154141A1
Автор: HIROSAKI Naoto, MIKI Hisayuki, Shioi Kousuke
Принадлежит:

A method for providing a phosphor, including a kneading step in which a raw material is kneaded to provide a raw material mixture; a sintering step in which the raw material mixture is sintered; and a heat treatment step in which the sintered raw material mixture is heat-treated, wherein the raw material includes at least one or more M-containing materials selected from MSi, MSiN, MSiN, MAlNand MSiN, wherein M is one or more divalent elements selected from M(0) and M(1). 1. A method for producing a phosphor , the method comprising:a kneading step in which a raw material is kneaded to provide a raw material mixture;a sintering step in which the raw material mixture is sintered; anda heat treatment step in which the sintered raw material mixture is heat-treated,{'sub': 2', '2', '2', '5', '8', '3', '2', '4', '6', '8, 'wherein the raw material comprises at least one or more M-containing materials selected from MSi, MSiN, MSiN, MAlNand MSiN, wherein M is one or more divalent elements selected from M(0) and M(1).'}2. The method for producing a phosphor according to claim 1 , further comprising:a step of grinding and classifying a mass of the sintered raw material mixture before the heat treatment step, andanother step of grinding and classifying a mass of a heat-treated product after the ground and classified mass of the raw material mixture is heat-treated in the heat treatment step.3. The method for producing a phosphor according to claim 1 , wherein a starting material comprises at least LiSiN.4. The method for producing a phosphor according to claim 1 , wherein a phosphor powder having a phosphor material of a target composition is produced in advance and the phosphor powder is added to the raw material mixture as a seed. This application is a divisional application of U.S. application Ser. No. 12/676,094 filed Mar. 2, 2010, which is a 371 of PCT International Application No. PCT/JP2008/065668 filed Sep. 1, 2008, which claims benefit of Japanese Patent Application No. ...

Подробнее
Номер записи: 30
27-06-2013 дата публикации

Thermoluminescent phosphor and method of producing the same

Номер: US20130161560A1
Автор: Akio Urushiyama, Yuji Tomizawa
Принадлежит: Individual

There is provided a thermoluminescent phosphor characterized in that a distribution of the emission intensity of thermoluminescence is present in a visible range that does not overlap the peak of the heating-caused emission intensity of the thermoluminescent phosphor itself and also has one peak within a temperature range in which a resin to be used as a binder can resist heat optically. There is also provided a method of producing the thermoluminescent phosphor. More specifically, there are provided a thermoluminescent phosphor that comprises lithium heptaborate as a base material and copper as a luminescent center present in the base material and which is characterized in that the distribution of the emission intensity of thermoluminescence versus temperature is a sole and monomodal distribution within the range of from 45° C. to 130° C., and a method of producing the thermoluminescent phosphor.

Подробнее
Номер записи: 31
27-06-2013 дата публикации

METHOD OF PRODUCING ULTRAVIOLET LIGHT EMITTING PHOSPHOR MATERIAL

Номер: US20130161561A1
Автор: Asano Hiroshi, Fukui Yusuke, Inoue Osamu
Принадлежит: Panasonic Corporation

The present invention is a method of producing an ultraviolet light emitting phosphor material. This method includes a step of heat-treating a composition containing zinc and oxygen as main components and at least one selected from the group consisting of aluminum, gallium and indium as a sub-component, in the presence of at least two coexisting substances selected from the group consisting of zinc oxide, gallium oxide and phosphorus oxide under a non-oxidizing atmosphere. 1. A method of producing an ultraviolet light emitting phosphor material , comprising a step of heat-treating a composition containing zinc and oxygen as main components and at least one selected from the group consisting of aluminum , gallium and indium as a sub-component , in the presence of at least two coexisting substances selected from the group consisting of zinc oxide , gallium oxide and phosphorus oxide under a non-oxidizing atmosphere.2. The method of producing an ultraviolet light emitting phosphor material according to claim 1 , wherein the coexisting substances in the heat treatment are zinc oxide claim 1 , gallium oxide claim 1 , and phosphorus oxide.3. The method of producing an ultraviolet light emitting phosphor material according to claim 1 , wherein the coexisting substances in the heat treatment are gallium oxide and phosphorus oxide.4. The method of producing an ultraviolet light emitting phosphor material according to claim 1 , wherein the composition further contains phosphorus as a sub-component.5. The method of producing an ultraviolet light emitting phosphor material according to claim 1 , wherein the atmosphere for the heat treatment is a reducing atmosphere.6. The method of producing an ultraviolet light emitting phosphor material according to claim 1 , wherein the temperature of the atmosphere for the heat treatment is not lower than 700° C. and not higher than 1000° C. The present invention relates to a method of producing a phosphor material which contains zinc oxide ...

Подробнее
Номер записи: 32
04-07-2013 дата публикации

PHOSPHOR AND LIGHT-EMITTING EQUIPMENT USING PHOSPHOR

Номер: US20130168606A1
Автор: HIROSAKI Naoto, Ueda Kyota, Yamamoto Hajime
Принадлежит:

Phosphors include a CaAlSiNfamily crystal phase, wherein the CaAlSiNfamily crystal phase comprises at least one element selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb. 1. A phosphor , comprising a CaAlSiNfamily crystal phase , wherein the CaAlSiNfamily crystal phase comprises at least one element selected from the group consisting of Mn , Ce , Pr , Nd , Sm , Eu , Tb , Dy , Ho , Er , Tm , and Yb.2. The phosphor according to claim 1 , wherein the CaAlSiNfamily crystal phase comprises at least one of:{'sub': '3', 'an inorganic compound having the same crystal structure as CaAlSiN; and'}{'sub': '3', 'an inorganic compound having the same X-ray diffraction pattern as CaAlSiN.'}3. The phosphor according to claim 2 , wherein:{'sub': 3', '3, 'the CaAlSiNfamily crystal phase comprises the inorganic compound having the same crystal structure as CaAlSiN; and'}{'sub': 3', '3, 'the inorganic compound has lattice constants that differ from lattice constants of CaAlSiNdue to replacement of at least one constituent element of CaAlSiNwith at least one other element.'}4. The phosphor according to claim 2 , wherein:{'sub': 3', '3, 'the CaAlSiNfamily crystal phase comprises the inorganic compound having the same X-ray diffraction pattern as CaAlSiN; and'}{'sub': '3', 'the X-ray diffraction pattern of the inorganic compound exhibits at least ten peaks present in the X-ray diffraction pattern of CaAlSiN.'}5. The phosphor according to claim 1 , wherein the CaAlSiNfamily crystal phase comprises:at least one divalent element selected from the group consisting of Mg, Ca, Sr, and Ba;at least one trivalent element selected from the group consisting of B, Al, Ga, In, Sc, Y, La, Gd, and Lu; andat least one tetravalent element selected from the group consisting of Si, Ge, Sn, Ti, Zr, and Hf.6. The phosphor according to claim 1 , wherein the CaAlSiNfamily crystal phase comprises at least Eu claim 1 , Ca claim 1 , Sr claim 1 , Al claim 1 , Si claim 1 , and ...

Подробнее
Номер записи: 33
25-07-2013 дата публикации

CORE-SHELL PHOSPHOR PRODUCED BY HEAT-TREATING A PRECURSOR IN THE PRESENCE OF LITHIUM TETRABORATE

Номер: US20130187093A1
Автор: Buissette Valérie, Le-Mercier Thierry
Принадлежит: Rhodia Operations

A method of producing a phosphor is described in which a precursor including particles having an average diameter from 1.5 micrometers to 15 micrometers is heat-treated under a reducing atmosphere. The method can produce particles including a mineral core and a shell including a composite phosphate of lanthanum and/or cerium, optionally doped with terbium. The composite phosphate of lanthanum and/or cerium covers the mineral core uniformly over a thickness greater than or equal to 300 nm. The aforementioned heat treatment at a temperature of 1050° C. to 1150° C. and for a time period of 2 hours to 4 hours can involve the use of lithium tetraborate (LiBO), which serves as a fluxing agent, in a mass quantity of at most 0.2%. 1. A phosphor comprising particles comprised of a mineral core and a shell that comprises a mixed phosphate of lanthanum and/or cerium , optionally doped with terbium , homogeneously covering the mineral core over a thickness greater than or equal to 300 nm , wherein the phosphor is obtained by a method wherein a precursor comprising the particles having an average diameter from 1.5 microns to 15 microns is heat-treated under a reducing atmosphere , the heat treatment taking place in the presence , as fluxing agent , of lithium tetraborate (LiBO) in an amount by weight of at most 0.2% , at a temperature from 1050° C. to 1150° C. and over a duration of 2 hours to 4 hours.2. The phosphor as described in claim 1 , wherein the phosphor is obtained by the aforementioned method wherein the shell of the precursor particles covers the mineral core over a thickness of from 0.3 micron to 1 micron.3. The phosphor as described in claim 1 , wherein the phosphor is obtained by the aforementioned process wherein the mineral core of the precursor particles is comprised of a phosphate or a mineral oxide.4. The phosphor as described in claim 1 , wherein the phosphor is obtained by the aforementioned process wherein the mixed phosphate of the shell of the precursor ...

Подробнее
Номер записи: 34
15-08-2013 дата публикации

Luminescent material and light emitting device comprising such luminescent material

Номер: US20130207002A1
Автор: Georg Greuel, Helga Bettentrup, Julian Plewa, Thomas Jüstel
Принадлежит: KONINKLIJKE PHILIPS ELECTRONICS NV

The invention provides a luminescent material comprising a component selected from the group comprising (Y 1-x Lu x ) 9 LiSi 6 O 26 :Ln or/and AE 5 (PO 4 ) 3 F:Ln,A, wherein Ln is a trivalent rare earth metal, AE is a divalent alkaline earth metal, and A is a monovalent alkaline metal, x>0.0 and <1.0. The luminescent material has an emission peak in the UV-C range when being excited by light in the UV spectrum range. The invention further provides a light emitting device comprising the said luminescent material and a method of using said light emitting device for disinfection or purification of air, water or surfaces.

Подробнее
Номер записи: 35
15-08-2013 дата публикации

Phosphor, Manufacture Thereof, Light-Emitting Device, and Image Display Device

Номер: US20130207535A1
Автор: FUNAHASHI Shiro, HIROSAKI Naoto, TAKEDA Takashi
Принадлежит:

Provided is a chemically-thermally stable phosphor having different emission characteristics from the conventional and exhibiting high emission intensity with an LED of 470 nm or less. A phosphor of the present invention includes A, D, E, and X elements (A is one or more kinds selected from Mg, Ca, Sr and Ba; D is one or more kinds selected from Si, Ge, Sn, Ti, Zr and Hf; E is one or more kinds selected from B, Al, Ga, In, Sc, Y and La; and X is one or more kinds selected from O, N and F), and an inorganic crystal of a crystal designated by SrSiAlON, another inorganic crystal having the same crystal structure as SrSiAlON, or a solid-solution crystal thereof, wherein M (one or more kinds of elements selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb) is solid-solved. 1. A phosphor comprising: an inorganic compound comprising:{'sub': 1', '3', '2', '4', '4', '1', '3', '2', '4', '4, 'an inorganic crystal constituted of a crystal designated by SrSiAlON, another inorganic crystal having a same crystal structure as the crystal designated by the SrSiAlON, or a solid-solution crystal thereof, into which an M element is solid-solved wherein M is one or more kinds of elements selected from a group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb,'}wherein the inorganic crystal, the other inorganic crystal, or the solid-solution crystal comprises: at leastan A element wherein A is one or more kinds of elements selected from the group consisting of Mg, Ca, Sr, and Ba;a D element wherein D is one or more kinds of elements selected from the group consisting of Si, Ge, Sn, Ti, Zr, and Hf;an E element wherein E is one or more kinds of elements selected from the group consisting of B, Al, Ga, In, Sc, Y, and La; andan X element wherein X is one or more kinds of elements selected from the group consisting of O, N, and F.2. The phosphor according to claim 1 ,{'sub': 1', '3', '2', '4', '4', '1', '3', '2', '4', '4', '1', '5', '8, 'wherein the other inorganic crystal having the ...

Подробнее
Номер записи: 36
15-08-2013 дата публикации

Phosphor, Manufacture Thereof; Light-Emitting Device, and Image Display Device Utilizing Phosphor

Номер: US20130207538A1
Автор: FUNAHASHI Shiro, HIROSAKI Naoto, TAKEDA Takashi
Принадлежит:

Provided is a chemically and thermally stable phosphor having different emission characteristics than the conventional phosphor and exhibiting high emission intensity if combined with an LED of 470 nm or less. The phosphor of the present invention is represented by a composition formula: MADEX(d+e+f+g+h=1; M is one or more kinds of elements selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb; A is one or more kinds of elements selected from Mg, Ca, Sr, and Ba; D is one or more kinds of elements selected from Si, Ge, Sn, Ti, Zr, and Hf; E is one or more kinds of elements selected from B, Al, Ga, In, Sc, Y, and La; and X is one or more kinds of elements selected from O, N, and F) and parameters d, e, f, g, and h satisfy the predetermined condition. 1. A phosphor comprising: an inorganic compound wherein the inorganic compound is expressed by a compositional formula of MADEX(where d+e+f+g+h=1; an M element is one or more kinds of elements selected from the group consisting of Mn , Ce , Pr , Nd , Sm , Eu , Tb , Dy , and Yb; an A element is one or more kinds of elements selected from the group consisting of Mg , Ca , Sr , and Ba; a D element is one or more kinds of elements selected from the group consisting of Si , Ge , Sn , Ti , Zr , and Hf; an E element is one or more kinds of elements selected from the group consisting of B , Al , Ga , In , Sc , Y , and La; and an X element is one or more kinds of elements selected from the group consisting of O , N , and F ,) and parameters d , e , f , g , and h satisfy following condition:{'br': None, 'i': '≦d≦', '0.000010.05;'}{'br': None, 'i': '≦e≦', '0.050.1;'}{'br': None, 'i': '≦f≦', '0.070.3;'}{'br': None, 'i': '≦g≦', '0.070.3; and'}{'br': None, 'i': '≦h≦', '0.450.6.'}2. The phosphor according to claim 1 , comprising the inorganic compound satisfying a relationship of:{'br': None, 'i': d+e', 'f+g, '0.5/5≦()/()≦2/5'}in the composition formula.3. The phosphor according to claim 2 , comprising the inorganic compound satisfying a ...

Подробнее
Номер записи: 37
22-08-2013 дата публикации

TUNGSTATE FLUORESCENT MATERIALS AND PREPARATION METHODS THEREOF

Номер: US20130214206A1
Автор: Liu Jun, Ma Wenbo, Zhou Mingjie
Принадлежит:

Tungstate luminescent materials and preparation methods thereof are provided. The said luminescent materials are represented by the following general formula: RWO:xM, wherein R is selected from one or two of Ca, Sr or Ba, M is selected from one or two of Ag, Au, Pt or Pd metal nano-particles; 0 Подробнее

Номер записи: 38
22-08-2013 дата публикации

BOROPHOSPHATE PHOSPHOR AND LIGHT SOURCE

Номер: US20130214673A1
Автор: Duan Cheng-Jun, ROESLER Sven
Принадлежит: LEUCHTSTOFFWERK BREITUNGEN GMBH

This invention is related to efficient inorganic borophosphate phosphors which can applied in various technical applications such as fluorescent lamps, colored light or white light emitting diodes, and other devices where phosphors are used to convert especially near UV radiation into the visible light. Further, this invention is related to light sources comprising the efficient borophosphate phosphor. The inventive phosphor absorbs radiation in a first wavelength range of the electromagnetic spectrum and emits radiation in a second wavelength range of the electromagnetic spectrum. This phosphor is a borophosphate activated with divalent rare earth metal ions. 1. A phosphor that absorbs radiation in a first wavelength range of the electromagnetic spectrum and emits radiation in a second wavelength range of the electromagnetic spectrum , wherein the phosphor is a borophosphateactivated with divalent rare earth metal ions and represented by the following general formula:{'br': None, 'sub': 1-x', 'x', '2', '8, 'AMREBPO;'} A is at least one univalent alkaline metal ion selected from the group comprising Li, K, Na, Rb, and Cs;', 'M is at least one divalent metal ion selected from the group comprising Ca, Sr, Ba, Be, Mg, and Zn;', 'RE is at least one divalent ion selected from the group comprising rare earth metals Eu, Sm, and Yb as well as Pb, Sn, Cu, and Mn, wherein at least one of the divalent rare earth metal ions Eu, Sm, and/or Yb is acting as an activator; and', '0 Подробнее

Номер записи: 39
29-08-2013 дата публикации

RADIATION STORAGE PHOSPHOR & APPLICATIONS

Номер: US20130221249A1
Автор: Kaczmarek Wieslaw Aleksander, Riesen Hans
Принадлежит: DOSIMETRY & IMAGING PTY LIMITED

The present invention relates to a photoexcitable storage phosphor which comprises at least one rare earth element in the trivalent +3 oxidation state and wherein upon irradiation by X- ray, γ-ray or UV radiation the trivalent +3 oxidation state is reduced to divalent +2 oxidation state. The present invention also relates to a dosimeter, radiation image storage panel comprising the phosphor of the present invention and in dosimetry applications for applications including scientific, medical and other imaging applications. The present invention also relates to a process for making a photoexcitable storage phosphor and a process for recording and reproducing an image. 1. A photoexcitable storage phosphor which comprises at least one rare earth element in the trivalent +3 oxidation state and wherein upon irradiation by X-ray , y-ray or UV radiation the trivalent +3 oxidation state is reduced to divalent +2 oxidation state.2. A photoexcitable storage phosphor according to claim 1 , wherein the rare earth element is selected from the group consisting of cerium claim 1 , praseodymium claim 1 , neodymium claim 1 , promethium claim 1 , samarium claim 1 , europium claim 1 , gadolinium claim 1 , terbium claim 1 , dysprosium claim 1 , holmium claim 1 , erbium claim 1 , thulium claim 1 , ytterbium and lutetium.32. A photoexcitable storage phosphor according to claim 1 , or claim 1 , wherein the rare earth element is selected from the group consisting of samarium claim 1 , dysprosium claim 1 , europium and gadolinium.4. A photoexcitable storage phosphor according to any one of to claim 1 , wherein the rare earth element is samarium.5. A photoexcitable storage phosphor according to any one of the preceding claims claim 1 , wherein the phosphor comprises at least one halogen element.6. A photoexcitable storage phosphor according to claim 5 , wherein the halogen element is selected from the group consisting of fluorine claim 5 , chlorine claim 5 , iodine and bromine.7. A ...

Подробнее
Номер записи: 40
29-08-2013 дата публикации

HALO-SILICATE LUMINESCENT MATERIALS AND PREPARATION METHODS THEREOF

Номер: US20130221275A1
Автор: Ma Wenbo, WANG Rong, Zhou Mingjie
Принадлежит:

Halo-silicate luminescent materials and preparation methods thereof are provided. The said luminescent materials are represented by the following general formula: (BaA)SiO:Eu, D@M, wherein A is selected from one or two of Sr, Ca, Mg or Zn, D is selected from one of F or Cl, M is selected from at least one of Ag, Au, Pt, Pd or Cu metal nano-particles; @ is coating; (BaA)SiO:Eu, D, is shell; 0.001 Подробнее

Номер записи: 41
29-08-2013 дата публикации

YTTRIUM-ALUMINUM-GARNET-TYPE PHOSPHOR

Номер: US20130221276A1
Автор: OHBAYASHI Takashi, OKUYAMA Kojiro, SHIRAISHI Seigo
Принадлежит: Panasonic Corporation

It is an object to provide phosphors with high luminance. It also is an object to provide phosphors with less decrease in luminance due to a reduction in particle diameter. A first phosphor is represented by a general formula: aYO.(3−a)CeO.bAlO.cGaO.fWO(2.80≦a≦2.99, 3.00≦b≦5.00, 0≦c≦2.00, 0.003≦f≦0.020, where 4.00≦b+c≦5.00). A second phosphor is represented by a general formula: aYO.(3−a)CeO.bAlO.cGaO.gKWO(2.80≦a≦2.99, 3.00≦b≦5.00, 0≦c≦2.00, 0.003≦g≦0.015, where 4.00≦b+c≦5.00). 1. A phosphor represented by a general formula:{'sub': 32', '32', '32', '32', '3, 'aYO.(3−a)CeO.bAlO.cGaO.fWO(2.80≦a≦2.99, 3.00≦b≦5.00, 0≦c≦2.00, 0.003≦f≦0.020, where 4.00≦b+c≦5.00).'}2. The phosphor according to claim 1 , wherein in the general formula:{'sub': 32', '32', '32', '32', '3, 'aYO.(3−a)CeO.bAlO.cGaO.fWO, 0.005≦f≦0.010.'}3. A phosphor represented by a general formula:{'sub': 32', '32', '32', '32', '2', '4, 'aYO.(3−a)CeO.bAlO.cGaOgKWO(2.80≦a≦2.99, 3.00≦b≦5.00, 0≦c≦2.00, 0.003≦g≦0.015, where 4.00≦b+c≦5.00).'}4. The phosphor according to claim 3 , wherein in the general formula:{'sub': 32', '32', '32', '32', '2', '4, 'aYO.(3−a)CeO.bAlO.cGaO.gKWO, 0.005≦g≦0.010.'} The present invention relates to an yttrium-aluminum-garnet-type phosphor that can be used for display devices and illumination devices.Conventionally, a compound represented by a chemical formula YAlOhas been known widely under the name of yttrium aluminum garnet and used in solid-state lasers, translucent ceramics, etc.Particularly, it is known that phosphors (YAG:Ce) obtained by adding Ce ions that function as luminescence centers to yttrium aluminum garnet are excited by electron beams, ultraviolet rays, corpuscular beams such as blue light, or electromagnetic irradiation, and emit visible light of yellow-green. It also is known that the 1/10 decay time of the phosphors is extremely short, which is a few ns or less. Therefore, the phosphors are used widely in various light-emitting devices (for example, see Patent ...

Подробнее
Номер записи: 42
29-08-2013 дата публикации

METHOD FOR THE PREPARATION OF NANOPARTICLES IN IONIC LIQUIDS

Номер: US20130221289A1
Автор: Arce Arce Alberto, Rodil Rodriguez Eva, Rodriguez Cabo Borja, Soto Campos Ana
Принадлежит: UNIVERSIDADE DE SANTIAGO DE COMPOSTELA

The invention relates to a method for the preparation of nanoparticles in ionic liquids. Specifically, the invention relates to a simple, quick and effective method for the preparation of dispersions of nanoparticles (nanofluids) in an ionic liquid. 1. Method for the preparation of a dispersion of nanoparticles in ionic liquids comprisinga) contacting a solid precursor with an ionic liquid,b) stirring the mixture between 50 and 150° C.,c) centrifugation and decantation.2. Method according claim 1 , which further comprises an additional step d) claim 1 , following step c) claim 1 , comprising the precipitation of the nanoparticles.3. Method according claim 2 , wherein the precipitation step d) claim 2 , comprises:i) adding a capping agent,ii) adding a solvent,iii) centrifugation and decantation.4. Method according to claim 1 , wherein the solid precursor in step a) is selected from the group consisting of metals claim 1 , metal oxides claim 1 , metal halides claim 1 , metal sulfides and metal selenides.5. Method according to claim 1 , wherein metal components in step a) are selected from transition metals.6. Method according to claim 1 , wherein the ionic liquid in the step a) has a melting point at or below 150° C.7. Method according to claim 1 , wherein in the step b) the mixture is stirred between 700 and 1300 rpm.8. Method according to claim 1 , wherein in the step c) the mixture is centrifuged between 3500 and 4500 rpm.9. Method according to claim 3 , wherein in the step i) the capping agent is a compound which is bearing a thiol group.10. Method according to claim 3 , wherein the solvent added in step ii) is selected from an alkyl alcohol and a dialkyl ketone.11. Method according to claim 3 , wherein in the step iii) the mixture is centrifuged between 4000 and 5000 rpm.12. Dispersion of nanoparticles in an ionic liquid obtainable by the method described in .13. Dispersion of nanoparticles in an ionic liquid according to claim 12 , wherein the nanoparticles have ...

Подробнее
Номер записи: 43
29-08-2013 дата публикации

Devices and articles comprising up-converting sterilizing compositions and methods for using the same

Номер: US20130224071A1
Автор: Eric F. Bernstein
Принадлежит: PHASE SHIELD LLC

There is disclosed various devices and articles comprising phosphors for converting electromagnetic energy to radiation having a shorter wavelength, the composition comprising at least one phosphor capable of converting an initial electromagnetic radiation having a wavelength (A) to an electromagnetic radiation having a shorter wavelength (B) comprising UV radiation or radiation of a shorter wavelength. There is also a method of sterilizing such devices and articles by exposing it to UV radiation or radiation of a shorter wavelength for a time sufficient to deactivate or kill at least one microorganism and/or for a time sufficient to inhibit abnormal cell growth within the body, when the composition is in an implantable medical device.

Подробнее
Номер записи: 44
12-09-2013 дата публикации

LUMINESCENT MATERIAL OF GALLIUM INDIUM OXIDE AND PREPARATION METHOD THEREOF

Номер: US20130234077A1
Автор: Liu Jun, Ma Wenbo, Zhou Mingjie
Принадлежит:

A luminescent material of gallium indium oxide and preparation method thereof are provided. The luminescent material of gallium indium oxide has a chemical formula of GaInO:zM, wherein, M is the metal nano-particle which is selected from one or two of Ag, Au, Pt and Pd, and z meets the condition of 1×10≦z≦0.02. The method for preparing the luminescent material comprises the following steps: (1) preparing the mixed solution containing indium ion and gallium ion; (2) adding chelator and crosslinking agent into the mixed solution to obtain a chelate solution; (3) adding M nano-particles sol which is surface treated into the chelate solution, heating by water-bath and stirring, drying to obtain the precursor of the luminescent material; (4) preheating the precursor, cooling, grinding, calcining, then cooling and grinding again to obtain the luminescent material. 1. A gallium indium oxide luminescent material , wherein the chemical formula of the luminescent material is GaInO:zM; wherein M represents a metal nanoparticle which is one or two selected from the group consisting of Ag , Au , Pt and Pd , and z is in the range of 1×10≦z≦0.02.2. A method for preparing a gallium indium oxide luminescent material , comprising the steps of:{'b': '1', 'sub': '3', 'Step S, adding a source compound of In and a source compound of Ga according to stoichiometric ratio of corresponding elements in chemical formula GaInOinto a mixed solvent of water and ethanol to prepare a mixed solution containing In ions and Ga ions;'}{'b': 2', '1, 'Step S, adding a chelating agent and a crosslinking agent into the mixed solution obtained in Step S to prepare a chelating solution;'}{'b': 3', '2, 'sub': '3', 'sup': '−5', 'Step S, adding a surface-treated M nanoparticle sol into the chelating solution prepared in Step S, and heating in a water bath while stirring, and then drying to give a precursor having a chemical formula of GaInO:zM; wherein M represents a metal nanoparticle which is one or two ...

Подробнее
Номер записи: 45
19-09-2013 дата публикации

Luminescent material

Номер: US20130241387A1
Автор: Iwao Mitsuishi, Keiko Albessard, Yumi Fukuda
Принадлежит: Individual

According to one embodiment, the luminescent material exhibits a luminescence peak in a wavelength ranging from 500 to 600 nm when excited with light having an emission peak in a wavelength ranging from 250 to 500 nm. The luminescent material has a composition represented by Formula 1 below: (M 1-x Ce x ) 2y Al z Si 10-z O u N w   Formula 1 wherein M represents Sr and a part of Sr may be substituted by at least one selected from Ba, Ca, and Mg; x, y, z, u, and w satisfy following conditions: 0<x≦1, 0.8≦y≦1.1, 2≦z≦3.5, u≦1 1.8≦z−u, and 13≦u+w≦15.

Подробнее
Номер записи: 46
31-10-2013 дата публикации

UV-EMITTING PHOSPHORS

Номер: US20130289132A1
Автор: Bettentrup Helga, Greuel Georg, Juestel Thomas, Plewa Julian
Принадлежит: KONINKLIJKE PHILIPS N.V.

The invention provides a wavelength converting material comprising a compound of the formula (YScLaGdLu)(S04):Me, wherein Me represents trivalent cation or a mixture of trivalent cations capable of emitting UV-C radiation, and wherein each of w, x, y and z is in the range of from 0.0 to 1.0 and w+x+y+z≦1.0, and wherein 0.0005≦a≦0.2. The wavelength converting material may be applied in an illumination device for UV illumination, in particular for sterilization or disinfection by germicidal UV illumination. 1. A wavelength converting material comprising a wavelength converting compound of the formula (YScLaGdLu)(SO):Me , wherein Me represents a trivalent cation or a mixture of trivalent cations capable of emitting UV-C radiation , and wherein each of w , x , y and z is in the range of from 0.0 to 1.0 and w+x+y+z≦1.0 , and wherein 0.0005≦a≦0.2.2. A wavelength converting material according to claim 1 , wherein Me comprises at least one of Pr claim 1 , Nd and Bi.3. A wavelength converting material according to claim 1 , wherein 0.002≦a≦0.1.4. A wavelength converting material according to claim 2 , comprising additionally at least one further trivalent cation as a co-dopant.5. A wavelength converting screen or coating claim 1 , comprising a wavelength converting material according to .6. An illumination device comprising a source of UV light to be converted claim 1 , and a wavelength converting material according to or a wavelength converting screen or coating for converting UV light from said source.7. An illumination device comprising a source of UV light to be converted which is a discharge lamp comprising a discharge vessel containing a gas comprising one or more of Ar claim 1 , Kr claim 1 , Xe claim 1 , F claim 1 , Cl claim 1 , Br claim 1 , and I claim 1 , wherein at least part of a wall of the discharge vessel is provided with a wavelength converting material according to .8. A medical device comprising a wavelength converting composition according to claim 1 , a ...

Подробнее
Номер записи: 47
07-11-2013 дата публикации

Phosphor manufacturing method

Номер: US20130292609A1
Автор: Kazuyoshi Uematsu, Kenji Toda, Mineo Sato, Tadashi Ishigaki, Tetsu Umeda, Yoshitaka Kawakami
Принадлежит: Niigata University NUC, Sumitomo Chemical Co Ltd

A method for producing a silicate-based oxynitride phosphor, comprising a step of firing a raw material mixture while contacting the raw material mixture with a Si-containing gas containing gas phase Si to generate a silicate-based oxynitride phosphor.

Подробнее
Номер записи: 48
02-01-2014 дата публикации

PHOSPHORS AND LIGHT EMITTING APPARATUS

Номер: US20140001403A1
Автор: LU Chung-Hsin, YANG Che-Yuan
Принадлежит: NATIONAL TAIWAN UNIVERSITY

Provided is a phosphor which comprises alkali earth ions, Si ion, N ion and Tb ion. Tb ion is used as a luminescence center. The phosphor has broad emission bands after excitation. The phosphor of the present invention can be used for a light emitting apparatus, and meets the need of the industrial application. 1. A phosphor comprising alkali earth ions , Si ion , N ion and Tb ion , wherein Tb ion is used as a luminescence center and the phosphor is excited by an excitation light which can be absorbed by Tb ion and has an emission band with a full width at half maximum greater than 20 nm.2. The phosphor of claim 1 , wherein the alkali earth ions are Mg ion claim 1 , Ca ion claim 1 , Sr ion claim 1 , Ba ion or a combination thereof.3. The phosphor of claim 1 , also comprising Mg ion claim 1 , Ca ion claim 1 , Sr ion claim 1 , Ba ion claim 1 , Ti ion claim 1 , Cu ion claim 1 , Zn ion claim 1 , B ion claim 1 , Al ion claim 1 , In ion claim 1 , Sn ion claim 1 , Sb ion claim 1 , Bi ion claim 1 , Ga ion claim 1 , Y ion claim 1 , La ion claim 1 , Lu ion claim 1 , Li ion claim 1 , Na ion claim 1 , K ion claim 1 , Ce ion claim 1 , Pr ion claim 1 , Nd ion claim 1 , Pm ion claim 1 , Sm ion claim 1 , Eu ion claim 1 , Gd ion claim 1 , Dy ion claim 1 , Ho ion claim 1 , Er ion claim 1 , Tm ion claim 1 , Yb ion claim 1 , Mn ion or a combination thereof.4. The phosphor of claim 1 , which is as shown in Formula (I):{'br': None, 'sub': x', 'y', 'z', 'r', 'a', 'b', 'c, 'TESiNTbLM\u2003\u2003(I)'}wherein,T is Mg, Ca, Sr or Ba;E is Mg, Ca, Ba, Ti, Cu, Zn, B, Al, In, Sn, Sb, Bi, Ga, Y, La or Lu;L is Li, Na or K;M is Ce, Pr, Nd, Pm, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb or Mn;1.45≦x≦2.6, 0≦y≦0.5, 4.35≦z≦5.6, 7.4≦r≦9, 0.01≦a≦0.5, 0≦b≦0.5; andwherein, Tb ion is used as the luminescence center and the phosphor is excited by an excitation light which can be absorbed by Tb ion and has an emission band with a full width at half maximum greater than 20 nm.5. The phosphor of claim 4 , wherein the ...

Подробнее
Номер записи: 49
13-02-2014 дата публикации

Luminophore composition for uv-visible light conversion and light converter obtained therefrom

Номер: US20140042477A1
Автор: Alain Ibanez, Antonio Carlos Hernandes, Lauro June Queiroz Maia, Vinicius Ferraz Guimaraes
Принадлежит: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS

A luminophore composition comprising amorphous aluminoborate powders is disclosed. The composition is obtainable by preparing an aluminoborate resin by a wet chemical route based on precursors solutions substantially free from monovalent and divalent cations; drying the resin to obtain a solid; grinding the solid to obtain a powder; pyrolyzing the powder at a pyrolysis temperature lower than the crystallization temperature of the composition; and calcinating the powder so pyrolyzed at a calcination temperature lower than the crystallization temperature of the composition. Furthermore, a process for the preparation of said composition is disclosed. The composition is particularly suitable for use in solid-state lighting, and for example for converting UV light into warm white visible light.

Подробнее
Номер записи: 50
03-01-2019 дата публикации

PHOSPHOR AND LIGHT EMITTING DEVICE HAVING THE SAME

Номер: US20190002761A1
Автор: MOON Ji Wook, SONG Woo Seuk
Принадлежит: LG INNOTEK CO., LTD.

A phosphor and a light emitting device comprising the same are disclosed in embodiments. The phosphor disclosed in an embodiment comprises a phosphor composition of a MDOF:Astructure containing a divalent metal (M), an elements (A) of the active agent, a fluorine or fluor (F) and an oxygen (O), and, wherein the x satisfies a range of 0.001≤x≤0.1, and the y satisfies a range of 1≤y≤5, wherein the M is at least one of Mg, Ca, Sr, Ba and Zn, wherein the D is at least one of Si, Ge, Sn, Ti, Zr and Hf, wherein the F is fluorine, wherein the A comprises at least one of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb, wherein the phosphor composition emits red light by a peak wavelength of 400 nm to 470 nm as an excitation wavelength, wherein the red light has a peak wavelength of 655 nm to 670 nm and has a FWHM of less than 20 nm. 1. A phosphor comprising:{'sub': 4', '1-4', 'y', 'x, 'a phosphor composition of a MDOF:Astructure containing a divalent metal (M), an elements (A) of the active agent, a fluorine or fluor (F) and an oxygen (O), and,'}wherein the x satisfies a range of 0.001≤x≤0.1, and the y satisfies a range of 1≤y≤5,wherein the M is at least one of Mg, Ca, Sr, Ba and Zn,wherein the D is at least one of Si, Ge, Sn, Ti, Zr and Hf,wherein the F is fluorine,wherein the A comprises at least one of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb,wherein the phosphor composition emits red light by a peak wavelength of 400 nm to 470 nm as an excitation wavelength, andwherein the red light has a peak wavelength of 655 nm to 670 nm and has a FWHM of less than 20 nm.2. The phosphor of claim 1 , wherein the M is Mg claim 1 , and wherein the D is Ge claim 1 , and wherein the A comprises Mn claim 1 ,{'sup': '4+', 'wherein the Mn includes Mn of tetravalent manganese.'}3. A phosphor comprising: a structure of composition of MgGeOF: Mn claim 1 ,wherein the x satisfies a range of 0.001≤x≤0.1, and the y satisfies a range of 1≤y≤5,wherein the composition has a peak ...

Подробнее
Номер записи: 51
13-01-2022 дата публикации

Paint and other materials including a taggant

Номер: US20220010145A1
Автор: Henry Guy Stevens
Принадлежит: Individual

There is provided a paint including a pigment, a carrier liquid, a binder, one or more additives, and a taggant corresponding to the one or more additives. The taggant is provided in an amount up to substantially 0.1% by weight of the paint. The taggant is excitable by infra-red or UV light at one wavelength to emit light at one or more other wavelengths, the emission wavelength or spectrum of the taggant being indicative of the additive(s) in the paint. A method of authenticating the paint on a substrate is also provided.

Подробнее
Номер записи: 52
03-01-2019 дата публикации

Novel transparency and color tunable electro-optical device using colloidal core/shell nanoparticles

Номер: US20190004390A1
Автор: Jinkyu HAN, Megan Carey Freyman, Thomas Han
Принадлежит: Lawrence Livermore National Security LLC

According to one embodiment, a product is a mixture including a solvent and generally spherical colloidal nanoparticles, the colloidal nanoparticles each having a core and a shell surrounding the core, and an electrode. In addition, the mixture is characterized as having a transparency to light in a predetermined wavelength range, where the transparency increases as a voltage of the electrode increases.

Подробнее
Номер записи: 53
03-01-2019 дата публикации

QUANTUM DOTS AND DEVICES INCLUDING THE SAME

Номер: US20190006556A1
Автор: JANG Eun Joo, JANG Hyo Sook, JUN Shin Ae, Kim Tae Hyung, KIM Taekhoon, KIM Yongwook, MIN Jihyun, PARK Garam, WON Yuho
Принадлежит:

A quantum dot includes a core-shell structure including a core including a first semiconductor nanocrystal and a shell disposed on the core, and including a material at least two different halogens, and the quantum dot does not include cadmium. 1. A core-shell quantum dot including at least two different halogens ,the core-shell quantum dot comprising:a core comprising a first semiconductor nanocrystal; anda shell disposed on the core, the shell comprising a crystalline or amorphous material,wherein the core-shell quantum dot does not include cadmium,wherein a solid state photoluminescence quantum efficiency of the core-shell quantum dot, when measured at 90° C. or greater, is greater than or equal to about 95% of a solid state photoluminescence quantum efficiency of the core-shell quantum dot when measured at 25° C., andwherein the at least two different halogens comprise fluorine and at least one of chlorine, bromine, and iodine.2. The core-shell quantum dot of claim 1 , wherein the at least two different halogens consist of either fluorine and chlorine or fluorine and bromine.3. The core-shell quantum dot of wherein the first semiconductor nanocrystal comprises indium and phosphorous and the crystalline or amorphous material of the shell comprises zinc and at least one of sulfur and selenium.4. The core-shell quantum dot of claim 1 , wherein a solid state photoluminescence quantum efficiency of the core-shell quantum dot when measured at 100° C. is greater than or equal to about 95% of the solid state photoluminescence quantum efficiency of the core-shell quantum dot when measured at 25° C.5. The core-shell quantum dot of claim 1 , wherein a solid state photoluminescence quantum efficiency of the core-shell quantum dot when measured at a 150° C. is greater than or equal to about 80% of the solid state photoluminescence quantum efficiency of the core-shell quantum dot when measured at 25° C.6. The core-shell quantum dot of claim 1 , wherein each halogen is present ...

Подробнее
Номер записи: 54
27-01-2022 дата публикации

UV-EMITTING PHOSPHOR, METHOD FOR PRODUCING SAME, AND UV EXCITATION LIGHT SOURCE

Номер: US20220025258A1
Автор: Ichikawa Norio, IKEDA Kohei
Принадлежит: HAMAMATSU PHOTONICS K.K.

A UV excitation light source comprises a phosphor. The phosphor contains ScYPOcrystals (wherein 0 plane measured by an X-ray diffractometer using CuKα rays is 0.25° or less.4. A method for producing the UV emitting phosphor according to claim 1 , comprising:preparing a mixture containing an oxide of yttrium (Y), an oxide of scandium (Sc), phosphoric acid or a phosphoric acid compound, and a liquid;vaporizing the liquid; andfiring the mixture.5. The method for producing the UV emitting phosphor according to claim 4 , wherein claim 4 , in the preparing claim 4 , a mixing proportion of the oxide of Sc without the phosphoric acid and the phosphoric acid compound is 1.2% by mass or more and 47.8% by mass or less.6. The method for producing the UV emitting phosphor according to claim 4 , wherein claim 4 , in the third step firing claim 4 , a firing temperature is set to 1050° C. or higher.7. A UV excitation light source comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the UV emitting phosphor according to ; and'}a light source configured to irradiate the UV emitting phosphor with UV light having the first wavelength. The present ...

Подробнее
Номер записи: 55
14-01-2016 дата публикации

Stable Phosphors for Lighting Applications

Номер: US20160009989A1
Автор: MITRA Sonali, VOGT Thomas
Принадлежит:

Compositions are generally provided that include an oxyfluoride compound. In one embodiment, the oxyfluoride compound has the formula: NaCa,AGeOFNwhere A is Ba, Sr, or a mixture thereof; 0.01≦x≦0.1; 0≦y<0.2; and 0≦z≦0.1. Methods of forming such compounds are also generally provided. 2. The composition as in claim 1 , wherein z is 0.3. The composition as in claim 1 , wherein y is 0.5. The composition as in claim 1 , wherein A is Ba.6. The composition as in claim 1 , wherein A is Sr.7. The composition as in claim 1 , wherein 0.01≦x≦0.06.8. The composition as in claim 1 , further comprising: an activator ion coupled with the compound.10. The composition as in claim 9 , wherein x is 0.11. The composition as in claim 9 , wherein z is 0 and y is 0.12. The composition as in claim 9 , wherein the activator ion comprises an ion of an element selected from the group consisting of La claim 9 , Ac claim 9 , Ce claim 9 , Pr claim 9 , Nd claim 9 , Sm claim 9 , Eu claim 9 , Gd claim 9 , Tb claim 9 , Dy claim 9 , Ho claim 9 , Er claim 9 , Tm claim 9 , Yb claim 9 , Th claim 9 , U claim 9 , Cr claim 9 , Mn claim 9 , Tc claim 9 , Re claim 9 , Cu claim 9 , Ag claim 9 , Au claim 9 , Zn claim 9 , Cd claim 9 , Hg claim 9 , As claim 9 , Sb claim 9 , Bi claim 9 , Ge claim 9 , Sn claim 9 , Pb claim 9 , In claim 9 , Tl claim 9 , and mixtures thereof.13. The composition as in claim 9 , wherein the activator ion comprises an ion of Eu claim 9 , Ce claim 9 , Tb claim 9 , or a mixture thereof.14. The composition as in claim 9 , wherein the activator ion comprises Eu claim 9 , Ce claim 9 , Tb claim 9 , or a mixture thereof.15. A method of doping a compound having the formula: NaCaGeOFNwhere 0.01≦x≦0.1; 0≦y≦0.2; and 0≦z≦0.1 claim 9 , the method comprising:introducing defects into the compound by substituting a portion of the Ca ions with ions of Ba, Sr, or a mixture thereof. Research in solid-state lighting and in particular on new phosphor materials for white-light emitting diodes (LEDs) can ...

Подробнее
Номер записи: 56
14-01-2021 дата публикации

METHOD OF PREPARING MECHANOLUMINESCENT MATERIAL AND COMPOSITE MATERIAL CONTAINING IT

Номер: US20210009897A1
Автор: Du Yangyang, Sun Tianying, Wang Feng, Zhao Jianxiong
Принадлежит:

A method of preparing a mechanoluminescent material includes the steps of: a) providing a mixture including precursors of a base material, a fluxing agent, and at least one lanthanide ion; b) heat-treating the mixture to obtain the mechanoluminescent material; and c) optionally grinding the mechanoluminescent material into powder form; wherein the fluxing agent facilitates incorporation of the at least one lanthanide ion into the base material. A composite material includes a first mechanoluminescent material, wherein the first mechanoluminescent material includes at least 2-3 mol % of a lanthanide ion. 1. A method of preparing a mechanoluminescent material comprising the steps of:a) providing a mixture including precursors of a base material, a fluxing agent, and at least one lanthanide ion;b) heat-treating the mixture to obtain the mechanoluminescent material; andc) optionally grinding the mechanoluminescent material into powder form;wherein the fluxing agent facilitates incorporation of the at least one lanthanide ion into the base material.2. The method of claim 1 , wherein the fluxing agent includes a lithium compound.3. The method of claim 2 , wherein the lithium compound is provided in a molar percentage of 6% in the mixture.4. The method of claim 1 , wherein the mixture includes a lanthanide fluoride to provide the at least one lanthanide ion.5. The method of claim 1 , wherein the lanthanide ion includes at least one of Tb claim 1 , Pr claim 1 , Nd claim 1 , Sm claim 1 , Eu claim 1 , Dy claim 1 , Ho claim 1 , Er claim 1 , Tm or Yb.6. The method of claim 1 , wherein the precursors of base material include calcium carbonate and zinc sulfide.7. The method of claim 6 , wherein the calcium carbonate is provided at an atomic ratio with respect to the at least one lanthanide ion by 1-x:x claim 6 , wherein x is 0.002 claim 6 , 0.005 claim 6 , 0.01 claim 6 , 0.02 claim 6 , 0.03 claim 6 , 0.04 or 0.08.8. The method of claim 1 , wherein the mechanoluminescent material ...

Подробнее
Номер записи: 57
14-01-2021 дата публикации

Blue fluorescent powder for three primary color warm white light led and preparation method therefor

Номер: US20210009898A1
Автор: CHAO Chen, Jiachao Chen, XING Yang, Yang Li
Принадлежит: XIAMEN UNIVERSITY

The present disclosure discloses a blue fluorescent powder for a three primary color warm white LED and a preparation method thereof. SrCO3, NH4Cl, H3BO3, Eu2O3, and NH4H2PO4 function as raw materials to obtain a chemical formula of a blue fluorescent powder Sr(2-x)Eux(BO3)y(PO4)(1-y)Cl in a reducing atmosphere by a solid-state sintering method, wherein 0.001≤x≤0.1 and 0.001≤y≤0.5. The blue fluorescent powder is mixed with CaAlSiN3:Eu2+ red fluorescent powder and (SrBa)2SiO4:Eu2+ green fluorescent powder at a certain proportion to emit warm white light with a light efficiency and a color rendering index under a violet light excitation. An application prospect is wide.

Подробнее
Номер записи: 58
11-01-2018 дата публикации

PHOSPHOR-INTEGRATED NANOPARTICLES USED IN FLUORESCENCE OBSERVATION

Номер: US20180011086A1
Автор: ISODA Takeshi, Takahashi Masaru
Принадлежит:

The present invention may provide phosphor-integrated nanoparticles whose precipitation and/or aggregation, particularly aggregation can be inhibited upon carrying out immunostaining therewith and which can thus be used for staining even after long-term storage without requiring a complicated operation, the phosphor-integrated nanoparticles preferrably maintaining excellent performance, such as staining properties, even after long-term storage. The phosphor-integrated nanoparticles of the present invention have an average sphericity (f) of 0.80 to 0.95 and preferably have an average circumference ratio (R) of 0.50 to 0.95. More preferably, the matrix of the particles contains an organic compound, the phosphor-integrated nanoparticles have an average particle size of 300 nm or less, and a biological component-binding molecule is bound on the particle 1. Phosphor-integrated nanoparticles having an average value of the sphericity (f) represented by the following Formula (1) of 0.80 to 0.95:{'br': None, 'i': f=[M', '/N, 'sup': '0.5', '/(π/4)]max\u2003\u2003(1)'}{'sup': '2', '(wherein, M represents the area of a projected cross-section (nm) of a fine particle, and Nmax represents the maximum diameter (nm) of said cross-section).'}2. The phosphor-integrated nanoparticles according to claim 1 , which have an average value of the circumference ratio (R) represented by the following Formula (2) of 0.50 to 0.95:{'br': None, 'i': R=', 'M/π]', 'r, 'sup': '0.5', '2π([)/1\u2003\u2003(2)'}{'sup': '2', '(wherein, M represents the area of a projected cross-section (nm) of a fine particle, and r1 represents the circumferential length (nm) of said cross-section).'}3. The phosphor-integrated nanoparticles according to claim 1 , wherein the matrix of said particles comprises an organic compound.4. The phosphor-integrated nanoparticles according to claim 1 , wherein said organic compound is a thermosetting resin.5. The phosphor-integrated nanoparticles according to claim 1 , which have ...

Подробнее
Номер записи: 59
15-01-2015 дата публикации

Na3WO4F and Derivatives Thereof as a Scintillation Material and Their Methods of Making

Номер: US20150014585A1
Автор: VOGT Thomas
Принадлежит:

Direct synthesis methods are generally provided that include reacting Na(WO).2HO (and/or Na(GeO).2HO) with NaF in an inert atmosphere at a reaction temperature of about 950° C. to about 1400° C., along with the resulting structures and compositions. 1. A direct synthesis method , comprising:{'sub': 2', '4', '2, 'reacting Na(WO).2HO with NaF in an inert atmosphere at a reaction temperature of about 950° C. to about 1400° C.'}2. The method as in claim 1 , wherein Na(WO).2HO is reacted with NaF according to the reaction:{'br': None, 'i': −x', 'x, 'sub': 2', '4', '2', '2', '4', '2', '3', '1-x', 'x', '4, '(1)Na[WO].2HO+Na[MO].HO+NaF→NaWMOF'}where0≦x≦0.2; andM is B, Al, Si, P, S, Cr, V, Nb, Ta, Zr, Hf, Sc, Y, La, Ga, Ge, In, Mo, or combinations thereof.3. The method as in claim 2 , wherein x is 0 such that Na(WO)F is formed.4. The method as in claim 3 , wherein NaWOF is formed into single crystals having an impurity concentration present at a concentration of less than about 500 ppb.5. The method as in claim 2 , wherein 0 Подробнее

Номер записи: 60
03-02-2022 дата публикации

CERAMIC MODULE EMITTING FAR INFRARED RADIATION AND SPECIFIC LOW DOSE IONIZING RADIATION

Номер: US20220032086A1
Автор: Wey Albert Chin-Tang
Принадлежит:

This invention relates to a ceramic module for assembly into a therapeutic device for treating a human or animal body with irradiation of far infrared radiation and low dose ionizing radiation based on radiation hormesis effect. More specifically, the invention relates to a ceramic module that simultaneously emits far infrared radiation within 3-16 μm wavelength spectrum and ionizing radiation at a specific dose rate in the range of 0.1-11 μSv/h (micro-Sieverts per hour). Said ceramic module may be used alone or serve as components of a therapeutic device for increasing physiologic performance, immune competence, health, and mean lifespan of human or animal. 1. A ceramic module for use in a therapeutic device for treating a human or animal body , said ceramic module comprising a mixture of a first set of powdered substance emitting far infrared radiation and a second set of powdered substance emitting ionizing radiation , wherein as a result of the mixture of the first and second sets of powdered substances being calcined at a temperature at or above 900° C. into a shaped article , said ceramic module simultaneously emits far infrared radiation within 3-16 μm wavelength spectrum and ionizing radiation at a specific dose rate in the range of 0.1-11 μSv/h.2. The ceramic module according to claim 1 , wherein the ionizing radiation dose rate of said ceramic module is in the range of 0.1-0.5 μSv/h.3. The ceramic module according to claim 1 , wherein said first set of powdered substance includes one or more oxides selected from the group consisting of silicate claim 1 , alumina claim 1 , zirconia claim 1 , phosphate claim 1 , sodium oxide claim 1 , potassium oxide claim 1 , ferric oxide claim 1 , chromic oxide claim 1 , titanium oxide claim 1 , magnesium oxide claim 1 , manganese oxide claim 1 , calcium oxide claim 1 , nickel oxide claim 1 , and cobalt oxide claim 1 , wherein at least one of the selected oxide is at least 2% by weight.4. The ceramic module according to ...

Подробнее
Номер записи: 61
21-01-2016 дата публикации

MAGNESIUM-BASED COATINGS FOR NANOCRYSTALS

Номер: US20160017217A1
Автор: BARTEL Joseph
Принадлежит:

Semiconductor nanocrystal compositions comprising magnesium containing shells and methods of preparing them are described. The compositions provide strong emission in the blue and green wavelengths as well as chemical and photostability that have not been achieved with conventional shell materials.

Подробнее
Номер записи: 62
18-01-2018 дата публикации

INDIUM-BASED QUANTUM DOTS AND PRODUCTION METHODS THEREOF

Номер: US20180016495A1
Автор: Alivisatos Paul, BEKENSTEIN Yehonadav, JANG Eun Joo, KIM Tae Gon
Принадлежит:

An indium-containing quantum dot including a compound represented by Chemical Formula 1: 1. An indium-containing quantum dot comprising a compound represented by Chemical Formula 1:{'br': None, 'sub': 1-x', 'x, 'InMA \u2003\u2003Chemical Formula 1'}wherein, in Chemical Formula 1, M is aluminum, gallium, yttrium, or scandium, A is nitrogen, phosphorous, arsenic, antimony, bismuth, or a combination thereof, and X is greater than or equal to 0 and less than 1,wherein the indium-containing quantum dot comprises fluorine and oxygen, each of which are bonded to a surface of the indium-containing quantum dot,wherein an amount of the fluorine is greater than or equal to about 10 atomic percent, based on a total number of indium atoms in the indium-containing quantum dot, as determined by Rutherford backscattering analysis, andwherein an amount of the oxygen is between about 5 atomic percent and about 50 atomic percent, based on the total number of indium atoms in the indium-containing quantum dot, as determined by Rutherford backscattering analysis.2. The indium-containing quantum dot of claim 1 , wherein in Chemical Formula 1 claim 1 , the A is phosphorous.3. The indium-containing quantum dot of claim 1 , wherein in Chemical Formula 1 claim 1 , the A is arsenic or antimony.4. The indium-containing quantum dot of claim 1 , wherein the indium-containing quantum dot has a ratio of indium atoms to the A atoms greater than or equal to about 1.2 claim 1 , as determined by Rutherford backscattering analysis.5. The indium-containing quantum dot of claim 1 , wherein the amount of the fluorine is greater than or equal to about 40 atomic percent claim 1 , based on the total number of indium atoms in the indium-containing quantum dot claim 1 , as determined by Rutherford backscattering analysis claim 1 , andwherein the amount of the oxygen is about 30 atomic percent to about 50 atomic percent, based on the total number indium atoms in the indium-containing quantum dot, as determined ...

Подробнее
Номер записи: 63
19-01-2017 дата публикации

Invisible Inimitable Identity, Provenance, Verification and Authentication 7,70 Identifier System

Номер: US20170016826A1
Автор: Norton Roger Dale
Принадлежит: Invisible Sentry LLC

The Invisible Inimitable Identity, Provenance, Verification and Authentication 7,70 Identifier System is an invisible or visible identifying embodiment having multiple machine readable emission output wavelengths and phosphorescence decay lifetimes generated from crystals contained in the embodiment when subjected to an incident energy source(s), the spatial distribution of the crystals limited only to the embodiment boundary. Comparison of the resulting spectral information histogram, using a preselected percentage of the decay lifetimes, against a database containing the embodiment's pre-established information verifies an item's identity and validates it as authentic. The system provides real-time verification for OEM parts and other items rapidly determining if the part or item is, in fact, an actual OEM item thus providing compliance to SAE Aerospace Standard AS6081. The 7,70 Identifier System provides a cost effective means of counterfeit part avoidance providing in excess of one billion individual unique identities. 1. An identity , verification and authentication system , an embodiment comprising a subset of three or more from a population of more than three inorganic phosphorescent crystals having different optical measurements , installed within an object's structure or in a suitable compound or binder upon the surface of the object , from which the subset of crystals when assayed for optical characteristics after application of incident energy source(s) conducive to their acceptable absorption and upon the energy source(s) removal , the crystals luminesce whereupon the subset combination of like crystals' and different crystals' emitting wavelengths' values together with their respective decay lifetimes' values are data collected in histograms used to establish a unique identity scheme , thereafter the decay lifetime values are multiplied by a user selected percentage of the measured decay lifetime value to be combined with the particle wavelength data to ...

Подробнее
Номер записи: 64
10-02-2022 дата публикации

QUANTUM DOTS AND DEVICES INCLUDING THE SAME

Номер: US20220041930A1
Автор: JANG Eun Joo, JANG Hyo Sook, MIN Jihyun, WON Yuho
Принадлежит:

A cadmium free quantum dot including a core including a first semiconductor nanocrystal, and a semiconductor nanocrystal shell disposed on the core, a composition of the semiconductor nanocrystal shell being different from a composition of the first semiconductor nanocrystal, a production method thereof, and a device including the same are disclosed. The semiconductor nanocrystal shell includes a zinc chalcogenide, the zinc chalcogenide includes selenium, tellurium, sulfur, or a combination thereof, and the quantum dot further alkaline an alkaline earth metal. 1. A quantum dot comprisinga core comprising a first semiconductor nanocrystal, anda semiconductor nanocrystal shell disposed on the core, a composition of the semiconductor nanocrystal shell being different from a composition of the first semiconductor nanocrystal,wherein the quantum dot does not comprise cadmium,wherein the semiconductor nanocrystal shell comprises a zinc chalcogenide,wherein the zinc chalcogenide comprises selenium, tellurium, sulfur, or a combination thereof, andwherein the quantum dot further comprises an alkaline earth metal.2. The quantum dot of claim 1 , wherein the first semiconductor nanocrystal does not comprise an indium phosphide.3. The quantum dot of claim 1 , wherein the first semiconductor nanocrystal comprises zinc claim 1 , tellurium claim 1 , and selenium.4. The quantum dot of claim 3 , wherein in the quantum dot claim 3 , a mole ratio of tellurium with respect to selenium is greater than 0:1 and less than or equal to about 0.1:1.5. The quantum dot of claim 1 , wherein the alkaline earth metal comprises barium claim 1 , strontium claim 1 , calcium claim 1 , magnesium claim 1 , or a combination thereof.6. The quantum dot of claim 5 , wherein the alkaline earth metal is present in the semiconductor nanocrystal shell.7. The quantum dot of claim 1 , wherein in the quantum dot claim 1 , an amount of the alkaline earth metal is greater than or equal to about 0.001 moles and less ...

Подробнее
Номер записи: 65
24-01-2019 дата публикации

PROCESSES FOR SYNTHESIZING NANOCRYSTALS

Номер: US20190023571A1
Автор: JANG Eun Joo, JANG Hyo Sook, JUN Shin Ae
Принадлежит:

A process of synthesizing Ga—Se nanocrystals is provided, the process including: 115.-. (canceled)16. A nanoparticle including a nanocrystal of a compound represented by Chemical Formula 1 or Chemical Formula 1-1:{'br': None, 'sub': x', 'y, 'GaSeA\u2003\u2003[Chemical Formula 1]'}{'br': None, 'sub': 'x', 'GaSe\u2003\u2003[Chemical Formula 1-1]'}wherein x is about 1.1 to 1.5, y is about 0.1 to 4, and A is S, Te, N, P, As, Al, In, Zn, Cd, Mg, Mn, Ag, Au, or a combination thereof.171. The nanoparticle of claim , wherein the nanoparticle comprises the nanocrystal of the compound represented by Chemical Formula 1-1.181. The nanoparticle of claim , wherein x is greater than or equal to about 1.2191. The nanoparticle of claim , wherein x is less than or equal to about 1.36.201. The nanoparticle of claim , wherein the nanocrystal of the compound represented by Chemical Formula 1 or Chemical Formula 1-1 is a selenium-rich Ga—Se nanocrystal.211. The nanoparticle of claim , wherein the A is S , Te , N , P , As , Al , Zn , Cd , Mg , Mn , Ag , Au , or a combination thereof.221. The nanoparticle of claim , wherein the nanoparticle has a core shell structure comprising a first nanocrystal and the nanocrystal of the compound represented by Chemical Formula 1 or Chemical Formula 1-1 is disposed on a surface of the first nanocrystal.23. The nanoparticle of claim 22 , wherein the first nanocrystal comprises a Group II-VI compound claim 22 , a Group III-V compound claim 22 , a Group IV-VI compound claim 22 , or a combination thereof.24. The nanoparticle of claim 23 , wherein the Group III-V compound further includes a Group II metal.25. The nanoparticle of claim 22 , wherein the first nanocrystal comprises a Group semiconductor nanocrystal core.26. The nanoparticle of claim 22 , wherein the first nanocrystal is a core-shell type semiconductor nanocrystal.27. The nanoparticle of claim 22 , wherein the first nanocrystal comprises ZnS claim 22 , ZnSe claim 22 , ZnTe claim 22 , ZnO claim ...

Подробнее
Номер записи: 66
24-01-2019 дата публикации

SCINTILLATOR AND ELECTRON DETECTOR

Номер: US20190023982A1
Автор: Fujita Yasuhisa, KONDO Minoru
Принадлежит:

A scintillator includes a support substrate, an emission layer formed on the substrate, made of ZnO with impurities added to have an electron concentration of 2×10cmor more and 2×10cmor less, and for generating scintillation light in response to incidence of radiation, a protective layer formed on the emission layer and made of a material having a band gap wider than that of ZnO, and a metal layer formed on the protective layer. The support substrate is made of a material transmitting the scintillation light generated in the emission layer. Further, the metal layer functions as a reflection layer for reflecting the scintillation light from the emission layer. 1: A scintillator comprising:a support substrate;{'sup': 19', '−3', '20', '−3, 'an emission layer formed on the support substrate, made of ZnO with impurities added to have an electron concentration of 2×10cmor more and 2×10cmor less, and configured to generate scintillation light in response to incidence of radiation;'}a protective layer formed on the emission layer and made of a material having a band gap wider than that of ZnO; anda metal layer formed on the protective layer, whereinthe support substrate is made of a material transmitting the scintillation light generated in the emission layer, and the metal layer functions as a reflection layer configured to reflect the scintillation light from the emission layer.2: The scintillator according to claim 1 , wherein the emission layer has a layer thickness of 0.5 μm or more and 3.0 μm or less.3: The scintillator according to claim 1 , wherein the impurities to be added to ZnO in the emission layer include at least one element selected from the group consisting of Ga claim 1 , Al claim 1 , and In.4: The scintillator according to claim 1 , wherein a buffer layer made of ZnO is formed between the support substrate and the emission layer.5: The scintillator according to claim 4 , wherein the buffer layer has a layer thickness of 20 nm or more and 400 nm or less.6: ...

Подробнее
Номер записи: 67
28-01-2021 дата публикации

PEROVSKITE POLYMER COMPOSITE

Номер: US20210024765A1
Автор: Li Beiye, Ng Jun De Andrew, Tan Zhi Kuang, Wong Ying-Chieh
Принадлежит: NATIONAL UNIVERSITY OF SINGAPORE

Disclosed herein is a polymeric film, the film comprising a polymeric matrix material, a plurality of perovskite nanocrystals and/or aggregates of perovskite nanocrystals dispersed throughout the polymeric matrix material. There is also disclosed a perovskite polymer resin composition, a perovskite-polymer resin composition, a perovskite ink and a method of forming a luminescent film using any one of the compositions or ink. Preferably, the perovskite material is a lead halide perovskite containing a cation selected from Cs, an alkylammonium ion, or a formamidinium ion. The polymeric matrix is preferably formed from monomers comprising a vinyl or an acrylate group. 2. The film according to claim 1 , wherein the polymeric matrix material is formed from monomers comprising a vinyl group.3. The film according to claim 2 , wherein the polymeric matrix material further comprises crosslinking groups.4. The film according to claim 3 , wherein the crosslinking groups are derived from a crosslinking agent comprising from two to five vinyl groups.5. The film according to claim 1 , wherein the film comprises one or both of:(a) from 0.05 to 50 wt % of the plurality of perovskite particles and/or perovskite aggregates and from 50 to 99.95 wt % of the polymeric matrix material; and(b) a weight to weight ratio of perovskite particles to polymeric matrix material of from 0.0002:1 to 1:1, such as from 0.0005:1 to 0.5:1, such as from 0.001:1 to 0.1:1.6. (canceled)7. The film according to claim 1 , where one or more of the following apply:each nanocrystal has a length of from 2 to 100 nm;each aggregate of perovskite nanocrystals has a diameter of from 50 to 5,000 nm; andeach perovskite nanocrystal and/or aggregate of perovskite nanocrystals is separated from each other perovskite nanocrystal and/or aggregate of perovskite nanocrystals by an average distance of from 20 to 2000 nm.8. The film according to wherein the crosslinked polymeric matrix material comprises a wt:wt ratio of ...

Подробнее
Номер записи: 68
28-01-2021 дата публикации

MN-ACTIVATED OXIDOHALIDES AS CONVERSION LUMINESCENT MATERIALS FOR LED-BASED SOLID STATE LIGHT SOURCES

Номер: US20210024824A1
Автор: Jansen Thomas, Juestel Thomas, Koehler Ingo, Petry Ralf, SIEVERT Katharina
Принадлежит: LITEC-VERMÖGENSVERWALTUNGSGESELLSCHAFT MBH

The present invention relates to Mn-activated luminescent materials, to a process for preparation thereof and to the use thereof as luminophores or conversion luminophores in light sources. The present invention further relates to a radiation-converting mixture comprising the luminescent material of the invention and a light source comprising the luminescent material of the invention or the radiation-converting mixture. The present invention further provides light sources, especially LEDs, and lighting units comprising a primary light source and the luminescent material of the invention or the radiation-converting mixture. The Mn-activated luminescent materials of the invention are especially suitable for creation of warm white light in LEDs. 1. Compound of the general formula (I):{'br': None, 'sub': 4-a', 'a', 'm/2+n/2', '2m', '4', '2', 'n, '(AB)X[MXO]\u2003\u2003(I)'}doped with Mn(IV), where the symbols and indices used are as follows:A is selected from the group consisting of H and D and mixtures thereof, where D is deuterium;{'sub': 4', '4', '4, 'B is selected from the group consisting of Li, Na, K, Rb, Cs, NH, ND, NRand mixtures of two or more thereof, where R is an alkyl or aryl radical;'}X is selected from the group consisting of F and Cl and mixtures thereof;M is selected from the group consisting of Cr, Mo, W, Re and mixtures of two or more thereof;0≤a≤4; 0 Подробнее

Номер записи: 69
29-01-2015 дата публикации

Encapsulated Nanoparticles

Номер: US20150031217A1
Автор: Emma Hogarth, Imad Naasani, James Gillies, Ombretta Masala, Xiaojuan WANG
Принадлежит: Nanoco Technologies Ltd

The present invention relates to a method for producing encapsulated nanoparticles by dispersing said nanoparticles and an encapsulating medium in a common solvent to form a first solution system and treating said first solution system with a stimulus suitable to induce simultaneous aggregation of the nanoparticles and the encapsulating medium.

Подробнее
Номер записи: 70
23-01-2020 дата публикации

DEVICES INCLUDING GREEN-EMITTING PHOSPHORS

Номер: US20200028033A1
Автор: Camardello Samuel Joseph, Setlur Anant Achyut
Принадлежит:

A device including an LED light source optically coupled to a phosphor material including a green-emitting phosphor selected from the group consisting of compositions of (A1)-(A70), and combinations thereof. 1. A device comprising an LED light source optically coupled to a phosphor material comprising a green-emitting phosphor selected from the group consisting of:{'sup': 2+', '1+, 'sub': y', '2−2y', '2', '2', '4', '2', '2', '4', '3, '(A1). (AM)(UO)(ZO)—xH, where M is NH, HO, Na, K, or a combination thereof; A is Fe, Co, Cu, Zn, Mg, Ca, Sr, Ba, Pb, or a combination thereof; Z is As, P, V or a combination thereof; 0≤y≤1 and 0≤x≤16;'}{'sup': '1+', 'sub': 2', '4', '2, '(A2). M(UO)(SO)(OH, F)—xHO, where M is K, Na, or a combination thereof; and 0≤x≤2;'}{'sup': 2+', '1+, 'sub': 2y', '4−4y', '2', '3', '3', '2, '(A3). (AM)(UO)(CO)—xHO, where M is Na, K, or a combination thereof; A is Mg, Ca, or a combination thereof; 0≤y≤1 and 0≤x≤18;'}{'sup': '2+', 'sub': 2', '4', '4', '2', '4', '2, '(A4). (A)(UO)(ZO)(OH, F)—xHO, where A is Ca, Pb, or a combination thereof; Z is As, P, or a combination thereof; and 0≤x≤7;'}{'sup': 2+', '1+, 'sub': y', '2−2y', '2', '6', '4', '6', '2, '(A5). (AM)(UO)O(OH, F)—xHO, where A is Ca, Ba, or a combination thereof; M is K; 0≤y≤1; and 0≤x≤8;'}{'sup': '1+', 'sub': 2', '2', '4', '2', '2, 'b': '4', '(A6). (M)(UO)(SO)—xHO, where M is NH, Na, or a combination thereof; and 0≤x≤3;'}{'sub': 2', '2', '4', '2', '2, '(A7). Al(UO)(ZO)(OH, F)—xHO, where Z is As, V, P, or a combination thereof; and 0≤x≤11;'}{'sup': 2+', '1+, 'sub': 2y', '4−4y', '2', '6', '4', '3', '10', '2, '(A8). (LM)(UO)(SO)(OH, F)—xHO, where L is Co, Ni, or a combination thereof; M is Na; 0≤y≤1 and 0≤x≤16;'}{'sup': '2+', 'sub': 2', '2', '3', '2', '4', '2', '2, '(A9). (A)(UO)O(PO)—xHO, where A is Ca, Pb, or a combination thereof; and 0≤x≤7;'}{'sup': 2+', '1+, 'sub': y', '2−2y', '2', '3', '3', '2', '2', '2', '3, '(A10). (AM)(UO)(SeO)O—xHO, where M is Ba, Na, or a combination thereof; A is HO; 0≤ ...

Подробнее
Номер записи: 71
02-02-2017 дата публикации

LIGHT BATTERY CONCERETE COMPOSITION AND METHOD OF SYNTHESIZING THE SAME

Номер: US20170029696A1
Автор: Barghlame Hadi, Hashempour Gavgani Hojjat
Принадлежит:

The various embodiments herein provide a light emitting concrete composition and a method of synthesizing a light emitting concrete structure. The light emitting concrete composition comprises light-emitting pigments. The light emitting pigments include a metallic powder, a sulphur powder and a plurality of resins, cement, sand, gravel and water. The method of synthesizing a light emitting concrete structure comprises preparing a slurry. The slurry is prepared by mixing sand, gravel, cement and water. Further, a light-emitting pigment mixture is prepared. The light emitting pigment mixture is prepared by mixing a metallic powder, a plurality of resins and a sulphur powder. The light-emitting pigment mixture is added to the slurry. The slurry is moulded by adding the slurry in moulds. The moulds are further kept at a temperature of 15-20° C. for at least 12-15 minutes. The slurry is cured at a temperature of less than 30° C. for 24 hours. 1. A light emitting concrete composition comprises:light-emitting pigments, wherein the light emitting pigments include a metallic powder, a sulphur powder and a plurality of resins;cement;sand;gravel; andwater.2. The concrete composition according to claim 1 , wherein the metallic powder is titanium powder.3. The concrete composition according to claim 1 , wherein the sulphur powder is selected from the group consisting of calcium sulphide claim 1 , zinc sulphide claim 1 , manganese sulphide or strontium sulphide.4. The concrete composition according to claim 1 , wherein the plurality of resin is one or more selected from the group consisting of furan claim 1 , furan epoxide claim 1 , polyester claim 1 , maleic polyester claim 1 , acrylate polyester claim 1 , epoxide claim 1 , phenol formaldehyde claim 1 , acetone formaldehyde claim 1 , carbamide claim 1 , acrylic resin claim 1 , vinyl monomers claim 1 , acrylate and methacrylate based binders claim 1 , vinyl esters claim 1 , monomers of vinyl series claim 1 , polyurethane claim 1 ...

Подробнее
Номер записи: 72
04-02-2016 дата публикации

Fluorescent substance and production method thereof

Номер: US20160032184A1
Автор: Kazuhiro Yagihashi, Masahide Daimon, Shuji Ohashi, Tsuneo Kusunoki, Yu Nomura
Принадлежит: Dexerials Corp

A fluorescent substance, represented by the following general formula (1): Ca 1-x (Se y S 1-y ):Eu x   (1) where y is a value in the range of 0.5 to 1, wherein an absolute value of a difference between an optimal value (nm) of an emission peak wavelength corresponding to the value of y, and a measured value (nm) of the emission peak wavelength is 5 nm or less, and wherein an absolute value of a difference between an optimal value (nm) of a full width at half maximum of emission corresponding to the value of y, and a measured value (nm) of the full width at half maximum of emission is 6 nm or less.

Подробнее
Номер записи: 73
17-02-2022 дата публикации

Converter System

Номер: US20220049159A1
Автор: KRAMES Michael, Van de Haar Marie Anne
Принадлежит:

The invention relates to a converter system, for instance for a light emitting device, comprising: a first material, which comprises, preferably essentially consists of an emitting material, emitting a color of interest, and is essentially free of sensitizer material, a second sensitizer material, which is essentially free of the first material and absorbs light (is excitable) in the wavelength range of interest and its emission spectrum overlaps at least partly with one or more excitation bands of the first material. 117-. (canceled)18. A converter system comprising:a first material, which comprises an emitting material, adapted to emit a color of interest, wherein the first material is essentially free of a sensitizer material; anda second sensitizer material, which is essentially free of the first material and is excitable in the wavelength range of interest and its emission spectrum overlaps at least partly with one or more excitation bands of the first material,wherein the emitting material of the first material comprises one or more of the ions of the group comprising Eu3+, Tb3+ and Mn4+, andwherein the second sensitizer material comprises one or more ions selected out of the group Eu2+, Pb2+, Bi3+ and Ce3+,wherein the emitting material and the second sensitizer material are disposed in different host lattices, andwherein the converter system is adapted to radiatively excite the second sensitizer material.19. The converter system according to claim 18 , wherein the first material and second sensitizer material are so arranged to each other to allow energy transfer from the second sensitizer material to the light emitting material in the first material.20. The converter system according to claim 18 , wherein the first material comprises a red emitting material.21. The converter system according to claim 18 , wherein the first material is provided as a nanophosphor.22. The converter system according to claim 18 , wherein the first material is provided as ...

Подробнее
Номер записи: 74
31-01-2019 дата публикации

REFLECTIVE ARTICLES COMPRISING A MICRO-CELLULAR STRUCTURE AND CHARACTERIZED BY IMPROVED (BLUE) LED AGING PERFORMANCE

Номер: US20190031850A1
Автор: MERCX Franciscus Petrus Maria, TER HORST Sascha Jan, VAN HEERBEEK Hendrikus Petrus Cornelis, VAN ZYL Andries Jakobus Petrus
Принадлежит:

Provided are articles having a cellular structure and also having improved aging performance under certain types of illumination. Also provided are methods of utilizing the disclosed articles. 1. An article , comprising:a region having a cellular structure comprising a plurality of cells,the plurality of cells having a number-average cross-sectional dimension in the range of from about 0.3 micrometers up to about 100 micrometers, and{'sup': '2', 'the article having a YI of less than 15 upon exposure for 100 hours to 35 kW/m'}2. The article of claim 1 , wherein the article has a YI according of less than 15 upon exposure for 200 hours to 35 kW/millumination having a peak centered at about 450 nm.3. The article of claim 1 , wherein the article has a YI according of less than 15 upon exposure for 300 hours to 35 kW/millumination having a peak centered at about 450 nm.4. The article of claim 1 , wherein the article is characterized as injection-molded.5. The article of claim 1 , wherein the region comprises an amount of phosphor.6. The article of claim 5 , wherein at least some of the phosphor resides on a surface of the article.7. The article of claim 1 , wherein the region comprises plastic claim 1 , metal claim 1 , glass claim 1 , carbon claim 1 , or any combination thereof.8. The article of claim 7 , wherein the plastic comprises a thermoplastic.9. The article of claim 8 , wherein the thermoplastic comprises polycarbonate.10. The article of claim 9 , wherein the plastic comprises a thermoset.11. The article of claim 1 , wherein the region comprises a nucleant.12. The article of claim 11 , wherein the nucleant comprises talc claim 11 , silica claim 11 , siloxane claim 11 , clay claim 11 , or any combination thereof.13. The article of claim 12 , wherein the nucleant comprises siloxane.14. The article of claim 1 , wherein the plurality of cells has a spatial density in the range of from 10cells/cmto 10cells/cm.15. The article of claim 1 , wherein the plurality of cells ...

Подробнее
Номер записи: 75
31-01-2019 дата публикации

Composition, color converting sheet and light-emitting diode device

Номер: US20190031954A1
Автор: Eiji Nishihara, Hiroshi Okura, Koutoku Ohmi, Stephan Dertinger, Tadashi Ishigaki
Принадлежит: Merck Patent GmBH

The present invention relates to a composition comprising a fluorescent material and a matrix material, a color conversion sheet and a light emitting diode device. The present invention further relates to the use of the composition in a color conversion sheet fabrication process, to the use of the color conversion sheet in optical devices or for agriculture purposes, and to the use of the fluorescent material and the matrix material in light emitting diode devices. Additionally, the invention relates to an optical device comprising the color conversion sheet and to a method for preparing the color conversion sheet and the optical device.

Подробнее
Номер записи: 76
31-01-2019 дата публикации

LIGHT EMITTING DEVICE

Номер: US20190035984A1
Автор: Ikeda Tadaaki, NAKABAYASHI Takuya
Принадлежит: NICHIA CORPORATION

A light emitting device is provided. The light emitting device includes a light emitting element, which emits blue light, and a light transmissive member having a first principal face bonded to the light emitting element and a second principal face opposite the first principal face. The light transmissive member has a light transmissive base material and wavelength conversion substances, which are contained in the base material and which absorb the light from the light emitting element and emit light. The wavelength conversion substances are localized in the base material towards the first principal face, and include a first phosphor which emits green to yellow light and a second phosphor which emits red light. The first phosphor is more localized towards the first principal face than the second phosphor. The second phosphor is a manganese-activated fluoride phosphor. 1. A method of producing a light emitting device comprising the steps of:preparing a wavelength conversion sheet by successively adhering together a first sheet including a base material and a first phosphor, a second sheet including a base material and a second phosphor, and a third sheet including a base material in this order;preparing a light transmissive member by cutting the wavelength conversion sheet into small pieces using an ultrasonic cutter;applying a light guide member on a light emitting device and placing the light transmissive member on the light emitting device via the light guide member;forming a cover member that embed the light emitting device, the light guide member and the light transmissive member; andexposing an upper face of the light transmissive member by grinding the cover member using a grinder.2. The method of producing the light emitting device according to claim 1 , further comprising the step of flip-chip mounting the light emitting device on an aggregate substrate before the applying and placing step.3. The method of producing the light emitting device according to ...

Подробнее
Номер записи: 77
09-02-2017 дата публикации

WHITE-LIGHT FLUORESCENT MATERIAL, AND MANUFACTURING METHOD AND USE THEREOF

Номер: US20170037310A1
Автор: CAO Zhanfeng, YAO Qi, ZHANG Wei
Принадлежит: BOE Technology Group Co., Ltd.

The present disclosure discloses a fluorescent material and a manufacturing method and use thereof. The fluorescent material comprises SnOdoped with Ag, wherein the molar ratio of Ag to SnOis 0.0014-0.007:1. The fluorescent material can emit fluorescent lights of two different colors which are complementary colors of each other, and the fluorescent material has a long service life. The fluorescent material is synthesized via a hydrothermal method under air atmosphere by using SnCl.5HO as a raw material. The method for manufacturing the fluorescent material is easy and simple, and significant economic and social benefits can be obtained when it is popularized and applied in the fields of illumination and display. The fluorescent material can be employed for manufacturing white-light fluorescent powder used in a white-light LED excitable by an ultraviolet-near ultraviolet LED diode chip. 1. A white-light fluorescent material , comprising SnOdoped with Ag wherein a molar ratio of Ag to SnOis 0.0014-0.007:1.2. The white-light fluorescent material according to claim 1 , wherein the molar ratio of Ag to SnOis 0.0014-0.0056:1.3. The white-light fluorescent material according to claim 1 , wherein the molar ratio of Ag to SnOis 0.0037-0.0056:1.4. The white-light fluorescent material according to claim 1 , wherein the white-light fluorescent material is nanoscale powder.5. A method for manufacturing the white-light fluorescent material according to claim 1 , comprising:{'sub': 4', '2, 'step 1, preparing a precursor by using SnCl.5HO as a raw material;'}step 2, dissolving NaOH and a surfactant in water and then mixing NaOH and the surfactant, and stirring at room temperature for 0.5-2 h, thus obtaining a mineralizer, wherein a mass ratio of NaOH to the surfactant is 1:1-1:1.5; and{'sub': 2', '2, 'step 3, mixing the precursor and the mineralizer and then stirring for homogenization, placing a resultant mixture into a hydrothermal reactor, reacting at 135-145□ for 12-18 h, ...

Подробнее
Номер записи: 78
12-02-2015 дата публикации

INTERMETALLIC COMPOUNDS FOR RELEASING MERCURY

Номер: US20150041713A1
Автор: Emilsson Tryggvi I., GORDON Daniel J., Hansen Steven C.
Принадлежит: Advanced Lighting Technologies, Inc.

Materials, compounds, systems, and methods of dosing fluorescent lamps to reduce run-up time by improving mercury release rates. A pellet comprises a core and a coating on at least a portion of the surface of the core, the coating being formed from a powder of one or more intermetallic compounds comprising mercury. A method comprises providing a core and forming a coating on at least a portion of the surface of the core with a material comprising one or more intermetallic compounds comprising mercury and a metal selected from the group consisting of silver, copper, tin, zinc, bismuth, gold, platinum, palladium, nickel, manganese, and titanium. 1. A pellet comprising a core and a coating on at least a portion of the surface of said core , the coating being formed from a powder of one or more intermetallic compounds comprising mercury.2. The pellet of wherein said coating encapsulates said core.3. The pellet of wherein said powder comprises silver and mercury.4. The pellet of wherein the said powder comprises more than one form of mercury claim 3 , silver and mercury-silver compounds simultaneously.5. The pellet of wherein said powder comprises a silver and mercury compound in the form of AgHg.6. The pellet of wherein said powder further comprises liquid mercury or a saturated amalgam in the form of a liquid silver amalgam.7. The pellet of wherein said powder further comprises pure silver or a silver-mercury solid solution.8. The pellet of wherein said powder further comprises β-AgHg intermetallic compound.9. The pellet of wherein said powder further comprises α-AgHg solid solution.10. The pellet of wherein said powder further comprises any other form of mercury and any other form of silver within the silver mercury binary system.11. The pellet of wherein said powder further comprises one or more metals from the group consisting of copper claim 5 , tin claim 5 , zinc claim 5 , gold claim 5 , platinum claim 5 , palladium claim 5 , nickel claim 5 , manganese claim 5 , ...

Подробнее
Номер записи: 79
24-02-2022 дата публикации

InP-based NANOCLUSTER, AND METHOD OF PREPARING InP-based NANOPARTICLE

Номер: US20220056338A1
Автор: AGNES Anastasia, Bang Kyuhyun, JANG Eun Joo, JANG Hyo Sook, KIM Jeongmin, Kim Sungjee, Kim Yong Wook, Kwon Yong Ju, LEE Eunjae, MIN Jihyun, WON Yuho
Принадлежит:

The invention relates to InP-based nanoclusters that include indium and phosphorus and further include zinc, chlorine, or a combination thereof, and to a method of preparing the InP-based nanoparticles including heating the InP-based nanoclusters in the presence of zinc, chlorine, or a combination thereof. 1. InP-based nanoclusters comprising indium and phosphorus , and further comprising zinc , chlorine , or a combination thereof.2. The InP-based nanoclusters of comprising the zinc.3. The InP-based nanoclusters of exhibiting a maximum absorption peak at a wavelength of about 393 nanometers.4. The InP-based nanoclusters of claim 3 , wherein a half-width at half-maximum of the maximum emission peak is less than or equal to about 15 nanometers.5. The InP-based nanoclusters of exhibiting a maximum absorption peak at a wavelength of about 408 nanometers.6. The InP-based nanoclusters of claim 5 , wherein a half-width at half-maximum of the maximum emission peak is less than or equal to about 20 nanometers.7. The InP-based nanoclusters of exhibiting a maximum absorption peak at the wavelength of about 360 nanometers.8. The InP-based nanoclusters of claim 7 , wherein a half-width at half-maximum of the maximum emission peak is less than or equal to about 30 nanometers.9. The InP-based nanoclusters of claim 2 , wherein the zinc is present in an amount of about 10 mole percent to about 40 mole percent relative to moles of indium.10. The InP-based nanoclusters of comprising chlorine.11. The InP-based nanoclusters of exhibiting a maximum absorption peak at the wavelength of about 399 nanometers.12. The InP-based nanoclusters of claim 11 , wherein a half-width at half-maximum of the maximum emission peak is less than or equal to about 10 nanometers.13. The InP-based nanoclusters of exhibiting a maximum absorption peak at the wavelength of about 360 nanometers.14. The InP-based nanoclusters of comprising zinc and chlorine claim 1 , wherein the chlorine is present in an amount of ...

Подробнее
Номер записи: 80
24-02-2022 дата публикации

PHOSPHOR AND LIGHT-EMITTING EQUIPMENT USING PHOSPHOR

Номер: US20220056339A1
Автор: HIROSAKI Naoto, Ueda Kyota, Yamamoto Hajime
Принадлежит:

Phosphors include a CaAlSiNfamily crystal phase, wherein the CaAlSiNfamily crystal phase comprises at least one element selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb. 1. Light-emitting equipment , comprising at least one light source , the light source comprising at least one light-emitting source and a phosphor , wherein:the light-emitting source emits a light having a wavelength of 330 to 500 nm; andthe phosphor comprises an inorganic compound which is a composition containing at least M Element, A Element, D Element, E Element, and X Element;the M Element is one or two or more elements selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb;the A Element is one or two or more elements selected from the group consisting of divalent metal elements other than M Element;the D Element is one or two or more elements selected from the group consisting of tetravalent metal elements;the E Element is one or two or more elements selected from the group consisting of trivalent metal elements;the X Element is one or two or more elements selected from the group consisting of O, N, and F;the M Element comprises at least Eu;the A Element comprises at least Ca or at least Ca and Sr;the D Element comprises at least Si;the E Element comprises at least Al;the X Element comprises at least N; and {'br': None, 'sub': a', 'b', 'c', 'd', 'e, 'MADEX'}, 'the inorganic compound is a composition given bywhere:a+b=1;0.00001≤a≤0.1;0.5≤c≤1.8;0.5≤d≤1.8;0.8×(2/3+4/3×c+d)≤e; ande≤1.2×(2/3+4/3×c+d).2. The light-emitting equipment according to claim 1 , wherein the light-emitting source emits a light having a wavelength of 420 to 500 nm.3. The light-emitting equipment according to claim 2 , wherein the phosphor further comprises at least one of:a phosphor having an emission peak at a wavelength of 500 to 570 nm; anda phosphor having an emission peak at a wavelength of 550 to 600 nm.4. The light-emitting equipment according ...

Подробнее
Номер записи: 81
07-02-2019 дата публикации

METHOD FOR THE PREPARATION OF LITHIUM SILICATE GLASSES AND LITHIUM SILICATE GLASS CERAMICS

Номер: US20190039944A1
Автор: Bürke Harald, Höland Wolfram, Krolikowski Sebastian, Rampf Markus, Ritzberger Christian, Schweiger Marcel
Принадлежит:

The invention relates to a method for the preparation of a lithium silicate glass or a lithium silicate glass ceramic which comprise cerium ions and are suitable in particular for the preparation of dental restorations, the fluorescence properties of which largely correspond to those of natural teeth. 1. Method for the preparation of a lithium silicate glass , a lithium silicate glass with nuclei which are suitable for forming lithium metasilicate and/or lithium disilicate crystals , or a lithium silicate glass ceramic , which comprises a step in which a melt of a starting glass which comprises cerium ions is reacted with at least one reducing gas.2. Method according to claim 1 , wherein the gas comprises hydrogen or comprises hydrogen and nitrogen.3. Method according to claim 1 , in which the starting glass comprises up to 5.0 wt.-% alkaline earth metal oxide.4. Method according to claim 3 , wherein the alkaline earth metal oxide is CaO claim 3 , BaO claim 3 , MaO claim 3 , SrOor a mixture thereof.7. Method according to claim 1 , in which the starting glass furthermore comprises terbium ions.8. Method according to for the preparation of a lithium silicate glass with nuclei which are suitable for forming lithium metasilicate and/or lithium disilicate crystals.9. Method according to for the preparation of a lithium silicate glass ceramic which comprises lithium metasilicate as main crystal phase and/or comprises more than 10 vol.-% lithium metasilicate crystals.10. Method according to claim 9 , wherein the lithium metasilicate glass ceramic comprises more than 20 vol.-% lithium metasilicate crystals.11. Method according to for the preparation of a lithium silicate glass ceramic which comprises lithium disilicate as main crystal phase and/or comprises more than 10 vol.-% lithium disilicate crystals.12. Method according to claim 11 , wherein the lithium silicate glass ceramic comprises more than 20 vol.-% lithium disilicate crystals.13. Method according to claim 1 , in ...

Подробнее
Номер записи: 82
18-02-2021 дата публикации

SYNTHESIS OF LUMINESCENT 2D LAYERED MATERIALS USING AN AMINE-METAL COMPLEX AND A SLOW SULFUR-RELEASING PRECURSOR

Номер: US20210047561A1
Автор: DANIELS Steven
Принадлежит:

Methods of synthesizing transition metal dichalcogenide nanoparticles include forming a metal-amine complex, combining the metal-amine complex with a chalcogen source in at least one solvent to form a solution, heating the solution to a first temperature for a first period of time, and heating the solution to a second temperature that is higher than the first temperature for a second period of time. 1. A method of preparing a transition metal dichalcogenide (TMDC) nanoparticle , the method comprising:forming a metal-amine complex;combining the metal-amine complex with a chalcogen source in at least one solvent to form a solution;heating the solution to a first temperature for a first period of time; andheating the solution to a second temperature that is higher than the first temperature for a second period of time.2. The method of claim 1 , wherein the amine of the metal-amine complex is an unsaturated fatty amine.3. The method of claim 2 , wherein the unsaturated fatty amine is oleylamine.4. The method of claim 2 , wherein the unsaturated fatty amine is hexadecylamine.5. The method of claim 1 , wherein the metal of the metal-amine complex is a transition metal.6. The method of claim 1 , wherein the chalcogen source is an organo-chalcogen compound that supplies the chalcogen via the cleavage of a chalcogen-carbon bond.7. The method of claim 6 , wherein the organo-chalcogen compound is an alkyl thiol.8. The method of claim 7 , wherein the alkyl thiol is 1-dodecanethiol.9. The method of claim 6 , wherein the organo-chalcogen compound is an alkyl selenol.10. The method of claim 9 , wherein the alkyl selenol is octane selenol.11. The method of claim 1 , wherein the metal of the metal-amine complex is molybdenum.12. The method of claim 1 , wherein the metal of the metal-amine complex comprises a metal carbonyl.13. The method of claim 12 , wherein the metal carbonyl is molybdenum hexacarbonyl.14. The method of claim 1 , wherein the at least one solvent is a coordinating ...

Подробнее
Номер записи: 83
16-02-2017 дата публикации

PHOSPHOR

Номер: US20170044431A1
Автор: HSU Ming-Chi, Lin Chun Che, Liu Ai-Sen, Liu Ru-Shi, Wei Ling-Ling
Принадлежит:

A phosphor, having a general formula of K[SiGe]F:Mn. The phosphor is excited to emit a light having a first main emission peak with a first maximum emission intensity and a first dominant wavelength, wherein a relative emission intensity S of the light of the phosphor is constantly greater than 85% across an temperature of the phosphor between 300 K and 470 K during operation, wherein S=(I/I)*100%, Iand Iare the first maximum emission intensity when the temperature of the phosphor is at 300 K and T during operation respectively, and 300 K Подробнее

Номер записи: 84
15-02-2018 дата публикации

QUANTUM DOT ARTICLE WITH THIOL-ALKENE-EPOXY MATRIX

Номер: US20180044582A1
Автор: Pieper Joseph M., Qiu Zai-Ming
Принадлежит:

Described is a quantum dot film article comprising a quantum dot of a cured thiol-alkene-epoxy matrix. The matrix formulations resist ingress from water and/or oxygen, while also providing acceptable color stability upon aging. 1. A composition comprising quantum dots dispersed in a thiol-alkene-epoxy resin matrix , wherein the thiol-alkene-epoxy resin is derived from at least one polythiol , at least one polyalkene and at least one polyepoxy resin , wherein each has a functionality ≧2.24-. (canceled)5. The composition of wherein the polyalkene is of the formula:{'br': None, 'sup': 1', '10', '11, 'sub': 'x', 'R\ue8a0CR═CHR],'}where{'sup': '1', 'Ris a polyvalent (hetero)hydrocarbyl group,'}{'sup': 10', '11, 'sub': 1', '4, 'each of Rand Rare independently H or C-Calkyl;'}and x is ≧2.67-. (canceled)8. The composition of wherein the polythiol is of the formula:{'sup': 2', '2, 'sub': 'y', 'R(SH), where Ris (hetero)hydrocarbyl group having a valence of y, and y is ≧2.'}910-. (canceled)11. The composition of wherein said polythiol is obtained by esterification of a polyol with a terminally thiol-substituted carboxylic acid.13. (canceled)1516-. (canceled)17. The composition of claim 1 , wherein the stoichiometric molar ratio of thiol groups of the polythiol to alkene groups of the polyalkene plus the epoxy groups of the epoxy resin is from 0.75:1 to 1:0.75.187. The composition of claim wherein the ratio of alkene groups of the polyalkene and epoxy groups of the polyepoxide are from 95:5 to 5:95.19. The composition of wherein the quantum dots are core-shelled quantum dots stabilized by organic ligand.20. The composition of wherein the quantum dots are selected from CdSe/ZnS and InP/ZnS.21. The composition of claim 1 , wherein the weight ratio of quantum dots in thiol-alkene-epoxy matrix is 0.1% to 20%.22. (canceled)23. The composition of wherein the thiol-alkene-epoxy matrix has no (meth)acrylate or alkynyl groups.24. A quantum dot article comprising:a first barrier layer;a ...

Подробнее
Номер записи: 85
06-02-2020 дата публикации

Light emitting device, method of manufacturing same and display device including same

Номер: US20200044173A1
Автор: Eun Joo Jang, Jeong Hee Lee, Oul CHO, Tae Ho Kim, Won Sik Yoon
Принадлежит: SAMSUNG ELECTRONICS CO LTD

A light emitting device includes: a first electrode and a second electrode facing each other, an emissive layer disposed between the first electrode and the second electrode and including a quantum dot, an electron auxiliary layer disposed between the emissive layer and the second electrode and including a plurality of nanoparticles, and a polymer layer between a portion of the second electrode and the electron auxiliary layer, wherein the nanoparticles include a metal oxide including zinc, wherein the second electrode has a first surface facing a surface of the electron auxiliary layer and a second surface opposite to the first surface, and the polymer layer is disposed on a portion of the second surface and a portion of the surface of the electron auxiliary layer, and wherein the polymer layer includes a polymerization product of a thiol compound and an unsaturated compound having at least two carbon-carbon unsaturated bonds.

Подробнее
Номер записи: 86
18-02-2016 дата публикации

Phosphor and led light emitting device using the same

Номер: US20160049558A1
Автор: Hajime Takeuchi, Katsutoshi Nakagawa, Ryo Sakai, Tsutomu Ishii, Yasuhiro Shirakawa, Yasumasa Ooya, Yoshitaka Funayama, Yumi Ito
Принадлежит: Toshiba Corp, Toshiba Materials Co Ltd

An LED light emitting device is provided that has high color rendering properties and is excellent color uniformity and, at the same time, can realize even luminescence unattainable by conventional techniques. A phosphor having a composition represented by formula: (Sr 2-X-Y-Z-ω Ba X Mg Y Mn Z Eu ω )SiO 4 wherein x, y, z, and ω are respectively coefficients satisfying 0.1<x<1, 0<y<0.5, 0<z<0.1, y>z, and 0.01<ω<0.2 is provided. The phosphor is used in combination with ultraviolet and blue light emitting diodes having a luminescence peak wavelength of 360 to 470 nm to form an LED light emitting device.

Подробнее
Номер записи: 87
08-05-2014 дата публикации

BRIGHTNESS OF CE-TB CONTAINING PHOSPHOR AT REDUCED Tb WEIGHT PERCENTAGE

Номер: US20140124703A1
Автор: Chau Chung-Nin
Принадлежит:

A phosphor material having reduced Tb content is disclosed, together with methods for preparing and using the same. 1. A composition comprising one or more phosphor materials comprising (LaCeTb)POand a rare earth phosphate , a metal phosphate , a metal oxide , or a combination thereof.2. The composition of claim 1 , wherein the one or more phosphor materials comprises a green-emitting component.3. The composition of claim 1 , comprising wherein the rare earth phosphate comprises LaPO claim 1 , GdPO claim 1 , LuPO claim 1 , (LaGd)PO claim 1 , or YPO claim 1 , or a combination thereof.4. The composition of claim 1 , wherein the rare earth phosphate comprises GdPO.5. The composition of claim 1 , wherein the metal phosphate comprises BiPO claim 1 , AlPO claim 1 , or a combination thereof.6. The composition of claim 1 , wherein the metal oxide comprises AlO claim 1 , YO claim 1 , LaO claim 1 , TaO claim 1 , NbO claim 1 , GdO claim 1 , or a combination thereof.7. The composition of claim 1 , having a reduced Tb content and an equivalent brightness claim 1 , as compared to a comparable phosphor material not comprising a rare earth phosphate claim 1 , metal phosphate claim 1 , or metal oxide.8. The composition of claim 1 , wherein all or a portion of the one or more phosphor materials have an average particle size of from about 2 μm to about 16 μm.9. A lamp assembly comprising the composition of .10. The lamp assembly of claim 17 , being a fluorescent lamp assembly claim 17 , a compact fluorescent lamp assembly claim 17 , or a combination thereof.11. The composition of claim 1 , wherein the composition comprises (LaGdCeTb)PO; wherein:a. 0.2 Подробнее

Номер записи: 88
08-05-2014 дата публикации

BRIGHTNESS OF Y2O3:EU AT REDUCED EU WEIGHT PERCENTAGE

Номер: US20140124704A1
Автор: Chau Chung-Nin
Принадлежит:

A yttrium europium oxide phosphor material having reduced Eu content is disclosed, together with methods for preparing and using the same. 1. A method for preparing a phosphor material , the method comprising contacting GdPOwith a co-precipitate of (YEu)O , (YEu)(CO) , (YEu)(CO) , or a combination thereof.2. The method of claim 1 , wherein GdPOis contacted with (YEu)O.3. The method of claim 2 , wherein the (YEu)Ois prepared from a solution of (YEu)Cl claim 2 , a nitrate claim 2 , or a combination thereof claim 2 , with oxalic acid claim 2 , ammonium bicarbonate claim 2 , or a combination thereof.4. The method of claim 1 , wherein GdPOis contacted with (YEu)(CO).5. The method of claim 4 , wherein the (YEu)(CO)is prepared from a solution of (YEu)Cl claim 4 , a nitrate claim 4 , or a combination thereof claim 4 , with HCO:xHO.6. The method of claim 1 , wherein GdPOis contacted with (YEu)(CO).7. The method of claim 6 , wherein the (YEu)(CO)is prepared from a solution of (YEu)Cl claim 6 , a nitrate claim 6 , or a combination thereof claim 6 , with (NH)HCO:xHO.8. The method of claim 1 , wherein the resulting phosphor material is fired at a temperature of at least about 900° C.9. The method of claim 8 , prior to firing claim 8 , the resulting phosphor material is optionally filtered and/or dried.10. The method of claim 8 , wherein after firing at a temperature of about 900° C. claim 8 , the resulting phosphor material can be contacted with a flux and fired at a temperature of about 1 claim 8 ,280° C. for a period of time sufficient to produce a composition having a desired particle size.11. The method of claim 1 , wherein the GdPOhas an average particle size of from about 0.2 μm to about 7 μm.12. The method of claim 1 , wherein the GdPOhas an average particle size of from about 2 μm to about 4 μm.13. A phosphor material prepared by the methods of .14. A YOE phosphor material having a reduced Eu content claim 1 , while maintaining a comparable brightness loss to a ...

Подробнее
Номер записи: 89
03-03-2022 дата публикации

Systems and Methods for Quantum Dot on Nanoplatelet Heterostructures with Tunable Emission in the Shortwave Infrared

Номер: US20220064531A1
Автор: Caram Justin, Tenney Stephanie
Принадлежит: The Regents of the University of California

Many embodiments implement quantum confined nanoplatelets (NPLs) that can be induced to emit bright and tunable infrared emission from attached quantum dot (QD). Some embodiments provide mesoscale NPLs with a largest dimension of greater than 1 micron. Certain embodiments provide methods for growing mesoscale NPLs and QD on mesoscale NPLs heterostructures. Several embodiments provide near unity energy transfer from NPLs to QDs, which can quench NPL emission and emit with high quantum yield through the shortwave infrared. The QD defect emission can be kinetically tunable, enabling controlled mid-gap emission from NPLs.

Подробнее
Номер записи: 90
16-02-2017 дата публикации

LIGHT EMITTING DEVICE AND LED LIGHT BULB

Номер: US20170048941A1
Автор: Fujii Toshitaka, Inoue Tomohiko, Kondo Hiroyasu, NAKAGAWA Atsuji, Shirakawa Yasuhiro, TSUDA Ryoji, Yamakawa Masahiko
Принадлежит:

A light emitting device includes: a first white light source which includes N pieces of first white light emitting diodes and emits a first white light; and a second white light source which includes M pieces of second white light emitting diodes and a first resistance element electrically connected in series to the second white light emitting diodes and having a first resistance value, is electrically connected in parallel to the first white light source, and emits a second white light, the light emitting device emitting a mixed white light of the first white light and the second white light. The drive voltage of the first white light source is higher than a drive voltage of the second white light source, and a color temperature of the mixed white light is higher as a total luminous flux of the mixed white light is higher. 1. A light emitting device comprising:a first white light source, including N pieces is a natural number equal to or more than 2) of first white light emitting diodes electrically connected in series to one another in a forward direction, and emitting a first white light having a first color temperature; anda second white light source, including M pieces (M is a natural number less than N) of second white light emitting diodes electrically connected in series to one another in a forward direction and a first resistance element electrically connected in series to the second white light emitting diodes and having a first resistance value, the second white light source being electrically connected in parallel to the first white light source, and emitting a second white light having a second color temperature lower than the first color temperature,the device emitting a mixed white light of the first white light and the second white light,wherein a drive voltage of the first white light source is higher than a drive voltage of the second white light source, andwherein a color temperature of the mixed white light is higher as a total luminous flux of ...

Подробнее
Номер записи: 91
26-02-2015 дата публикации

PHOSPHOR AND LIGHT-EMITTING DEVICE

Номер: US20150054010A1
Автор: Emoto Hideyuku, Fushii Yasuhito, Ichikawa Kohki, Kobayashi Keita, Yamada Suzuya
Принадлежит: DENKI KAGAKU KOGYO KABUSHIKI KAISHA

A high-brightness phosphor having high-temperature characteristics and long-term reliability, and a white light-emitting device using this phosphor are provided. The phosphor contains a silicate phosphor (A) having a peak wavelength of at least 525 nm but not higher than 535 nm and fluorescence intensity of at least 250% but not higher than 270%; an oxynitride phosphor (B) having a peak wavelength of at least 540 nm but not higher than 545 nm and fluorescence intensity of at least 260% but not higher than 280%; and an nitride phosphor (C) having a peak wavelength of at least 615 nm but not higher than 625 nm, wherein the amount of the silicate phosphor (A) is at least 20% but not higher than 35% by mass, the amount of the oxynitride phosphor (B) is at least 50% but not higher than 70% by mass, and the amount of the nitride phosphor (C) is at least 10% but not higher than 20% by mass. 1. A phosphor , comprising: a silicate phosphor (A) having a peak wavelength at least 525 nm but not higher than 535 nm and fluorescence intensity at least 250% but not higher than 270%;an oxynitride phosphor (B) having a peak wavelength at least 540 nm but not higher than 545 nm and fluorescence intensity at least 260% but not higher than 280%; andan nitride phosphor (C) having a peak wavelength at least 615 nm but not higher than 625 nm,wherein, the amount of the silicate phosphor (A) is at least 20% but not higher than 35% by mass; the amount of the oxynitride phosphor (B) is at least 50% but not higher than 70% by mass; and the amount of the nitride phosphor (C) is at least 10% but not higher than 20% by mass.2. The phosphor as set forth in claim 1 , wherein assuming the amount of the silicate phosphor (A) and that of the oxynitride phosphor (B) are a and b claim 1 , thereof the ratio satisfies 1.5≦b/a≦3.5.3. The phosphor as set forth in claim 1 , wherein assuming the amount of the silicate phosphor (A) claim 1 , that of the oxynitride phosphors (B) and that of the nitride phosphor ...

Подробнее
Номер записи: 92
25-02-2016 дата публикации

Multi-Luminescent Security Element and Value or Security Product Containing Said Security Element

Номер: US20160053169A1
Автор: KRÜGER Per, KUNATH Christian, MOMBRÉE Alexander, VON CZAPIEWSKI Christoph
Принадлежит:

In order to increase the security of value or security documents , a multi-luminescent security element is provided which contains at least one first luminescence means and at least one second luminescence means . The first luminescence means can be excited under first excitation conditions Sp- for the purpose of luminescence, and the second luminescence means can be excited under second excitation conditions Sp- for the purpose of luminescence, said second excitation conditions Sp- differing from the first excitation conditions Sp-. The multi-luminescent security element is additionally equipped with at least one absorber means which prevents an excitation of the at least one first luminescence means under the second excitation conditions Sp- for the purpose of luminescence. 140051015202140060051021. Multi-luminescent security element () , containing at least one first luminescence means () , which can be excited to luminescence under first excitation conditions (Sp-) , and at least one second luminescence means () , which can be excited to luminescence under second excitation conditions (Sp-) , which differ from the first excitation conditions (Sp-) , characterized in that , in the multi-luminescent security element () , in addition , at least one absorber means () is contained , which prevents an excitation to luminescence of the at least one first luminescence means () under the second excitation conditions (Sp-) , but not under the first excitation conditions (Sp-).2400400430440430510440520. Multi-luminescent security element () according to claim 1 , characterized in that the security element () comprises at least two element areas ( claim 1 , ) spatially separate from one another claim 1 , wherein claim 1 , in a first element area () claim 1 , the at least one first luminescence means () is contained claim 1 , and wherein claim 1 , in a second element area () claim 1 , the at least one second luminescence means () is contained.3400430600490600. Multi- ...

Подробнее
Номер записи: 93
25-02-2016 дата публикации

PROCESS OF FORMING PHOSPHOR PARTICLES WITH CORE SHELL STRUCTURES

Номер: US20160053171A1
Автор: Beers William Winder, Camardello Samuel Joseph, COHEN William Erwin, Comanzo Holly Ann, Porob Digamber Gurudas, Srivastava Alok Mani
Принадлежит:

Processes for producing particles of rare earth-containing phosphor materials, in which the particles have a core-shell structure and the shell has a lower rare earth content than the core. Such a process may include contacting a core particle with a precursor comprising Na(La,Ce,Tb)POto form a mixture, and then heating the mixture to a temperature sufficient to decompose the Na(La,Ce,Tb)POto evolve and melt an NaPOflux and initiate deposition of a (La,Ce,Tb)POshell on each core particle in the presence of the molten NaPOflux. 1. A process of producing a phosphor particle that comprises a core surrounded by a shell that absorbs ultraviolet photons to emit green-spectrum light , the process comprising:{'sub': 2', '7, 'contacting a core particle with a precursor comprising Na(La,Ce,Tb)POto form a mixture; and'}{'sub': 2', '7', '3', '4', '3, 'heating the mixture to a temperature sufficient to decompose the Na(La,Ce,Tb)POto evolve and melt an NaPOflux and initiate deposition of a (La,Ce,Tb)POshell on each core particle in the presence of the molten NaPOflux.'}2. The process according to claim 1 , wherein the process does not comprise an addition of a separate flux material into the mixture.3. The process according to claim 1 , wherein the precursor consists of Na(La claim 1 ,Ce claim 1 ,Tb)PO.4. The process according to claim 1 , wherein the shell contains at least one of LnPO:Tb and LnPO:Ce claim 1 ,Tb.5. The process according to claim 1 , wherein the shell consists of LnPO:Tb and/or LnPO:Ce claim 1 ,Tb.6. The process according to claim 5 , wherein Ln is chosen from the group consisting of cerium claim 5 , terbium claim 5 , lanthanum claim 5 , and combinations thereof.7. The process according to claim 1 , wherein the core particle contains at least one of LaPO claim 1 , AlO claim 1 , YO claim 1 , and GdO.8. The process according to claim 1 , wherein the core particle consists of LaPO claim 1 , AlO claim 1 , YO claim 1 , Or GdO.9. The process according to claim 1 , ...

Подробнее
Номер записи: 94
25-02-2021 дата публикации

FLUORESCENT NANOCOMPOSITE AND A METHOD OF DETECTING ANTIMONY IONS

Номер: US20210054269A1
Автор: Al-Ghamdi Ahmed Abdullah Salem, Al-Turki Yusuf Abdulaziz, Elsayed Waleed Elsayed Mahmoud
Принадлежит: KING ABDULAZIZ UNIVERSITY

A fluorescent nanocomposite which includes a thallium doped gadolinium chalcogenide having formula TlGdY, wherein x is 0.01 to 0.1, and Y is selected from the group consisting of S, Se, or Te, and a benzothiazolium salt bound to a surface of the thallium doped gadolinium chalcogenide. A method of detecting antimony ions in a fluid sample whereby the fluid sample is contacted with the fluorescent nanocomposite to form a mixture, and a fluorescence emission profile of the mixture is measured to determine a presence or absence of antimony ions in the fluid sample, wherein a reduction in intensity of a fluorescence emissions peak associated with the fluorescent nanocomposite indicates the presence of antimony ions in the fluid sample. 2. The fluorescent nanocomposite of claim 1 , wherein x is 0.04 to 0.06 and Y is S.3. The fluorescent nanocomposite of claim 1 , wherein the thallium doped gadolinium chalcogenide is TlGdS.4. he fluorescent nanocomposite of claim 1 , wherein the thallium doped gadolinium chalcogenide is in the form of core-type quantum dots having an average particle size of 3 to 7 nm.5. The fluorescent nanocomposite of claim 1 , wherein the thallium doped gadolinium chalcogenide is present in an amount of 14 to 35 wt. % claim 1 , based on a total weight of the fluorescent nanocomposite.6. The fluorescent nanocomposite of claim 1 , wherein:{'sup': '1', 'Ris a methyl, ethyl, or benzyl,'}{'sup': 2', '3, 'Rand Rare independently a methyl, an ethyl, or a 2-cyanoethyl, and'}{'sup': 4', '5, 'Rand Rare independently a hydrogen or a methyl.'}8. The fluorescent nanocomposite of claim 1 , wherein a weight ratio of the benzothiazolium salt of formula I to the thallium doped gadolinium chalcogenide is 1.95:1 to 6.0:1.9. The fluorescent nanocomposite of claim 1 , wherein the benzothiazolium salt of formula I is present in an amount of 65 to 86 wt. % claim 1 , based on a total weight of the fluorescent nanocomposite.10. The fluorescent nanocomposite of claim 1 , which ...

Подробнее
Номер записи: 95
25-02-2021 дата публикации

Semiconductor nanoparticles and core/shell semiconductor nanoparticles

Номер: US20210054273A1
Автор: Ryosuke Motoyoshi, Takafumi Moriyama
Принадлежит: Shoei Chemical Inc

An object of the present invention is to provide semiconductor nanoparticles having high quantum efficiency (QY) and a narrow full width at half maximum (FWHM). Semiconductor nanoparticles according to an embodiment of the present invention are semiconductor nanoparticles including at least, In, P, Zn and S, wherein the semiconductor nanoparticles include the components other than In in the following ranges: 0.50 to 0.95 for P, 0.30 to 1.00 for Zn, 0.10 to 0.50 for S, and 0 to 0.30 for halogen, in terms of molar ratio with respect to In.

Подробнее
Номер записи: 96
14-02-2019 дата публикации

METHOD FOR DETERMINING KINETIC PROFILES IN DRUG DISCOVERY

Номер: US20190049441A1
Автор: ALFONSO SAN-SEGUNDO Ana Patricia, CORRIONERO PÉREZ Ana
Принадлежит:

The present invention relates to a reliable, robust and sensitive platform aimed to analyze the massive kinetic profile of new molecules against its main target and also against other potential targets. Thus, the present invention relates to a method for calculating the kinetic profile of a compound of interest against a target protein or polyprotein wherein it is not needed to predetermine the Kvalue of the compound of interest against the target protein or polyprotein before starting the assay. The present invention also discloses the use of said method in a high-throughput system for developing a Binding Kinetic Profiling assay of multiple compounds of interest against a unique target, or a 1. Method for calculating the kinetic profile of a compound of interest against a target protein or polyprotein , which comprises the following steps: (i) a first molecule at a first concentration of between 1-500 nM,', '(ii) said target protein or polyprotein at a second concentration of between 0.5-50 nM, and', '(iii) a third molecule at a saturation concentration for the target protein or polyprotein of (ii), wherein said first molecule has affinity for said target protein or polyprotein and is labeled with a first fluorescent molecule, and said target protein or polyprotein is bonded to between 0.5-5 nM of an antibody labeled with a second fluorescent molecule; or said target protein or polyprotein is labeled with said second fluorescent molecule,', 'wherein said first fluorescent molecule is an acceptor fluorophore and said second fluorescent molecule is a donor fluorophore, and', 'wherein the third molecule is an inhibitor of the target protein or polyprotein which competes for the same binding sites of the target with the first molecule;, 'a. Mixing simultaneously in a well of a microplate (i) said first molecule at said first concentration,', '(ii) said target protein or polyprotein at said second concentration, and', '(iii) a compound of interest at a third ...

Подробнее
Номер записи: 97
13-02-2020 дата публикации

A PROCESS FOR THE SYNTHESIS OF AIR STABLE METAL SULPHIDE QUANTUM DOTS

Номер: US20200048543A1
Автор: BERA Abhjit, PRASAD Bhagavatula Lakshmi Vara
Принадлежит:

The present invention discloses a process for the preparation of metal sulphide quantum dots by using a very low cost sulphur precursor as a sulphur source. The metal sulphide quantum dots finds application in optical devices selected from photovoltaic cells, photodetectors and light-emission devices. 1. A process for the preparation of metal sulphide QDs comprising the steps of:a) reacting a metal salt with a ligand in a solvent followed by heating at a temperature ranging from 90 to 95° C. under a vacuum for a period ranging from 1 to 2 h to afford a metal oleate or a metal amine solution;b) preparing a dithiocarbamic acid solution by mixing octyl dithiocarbamic acid with a ligand and a solvent to form a mixture followed by injecting said mixture to the metal oleate or metal amine solution of step (a) to obtain a dithiocarbamic solution;c) injecting acetone to the dithiocarbamic solution of step (b) as an anti-solvent to obtain a precipitate, followed by collecting particles of precipitate by centrifugation to obtain metal sulfide QDs; andd) dispersing said metal sulfide QDs in a non-polar solvent to obtain colloidal quantum dots.2. The process as claimed in claim 1 , wherein said metal is selected from the group consisting of Lead (Pb) claim 1 , Cadmium (Cd) claim 1 , Manganese (Mn) claim 1 , Zinc (Zn) claim 1 , Copper (Cu) and Tin (Sn).3. The process as claimed in claim 1 , wherein said salt of the metal is selected from the group consisting of an oxide salt claim 1 , an acetate salt and a halide salts.4. The process as claimed in claim 1 , wherein said ligand is selected from the group consisting of oleic acid and oleyl amine.5. The process as claimed in claim 1 , wherein said solvent of step (a) and (b) is 1-octadecene.6. The process as claimed in claim 1 , wherein said non-polar solvent of step (d) is selected from tie group consisting of toluene claim 1 , chloroform claim 1 , hexane or octane.7. The process as claimed in claim 1 , wherein said metal sulfides ...

Подробнее
Номер записи: 98
13-02-2020 дата публикации

Process of Manufacturing a Conversion Element, Conversion Element and Light Emitting Device Comprising the Conversion Element

Номер: US20200048547A1
Автор: Avallon James, Kundaliya Darshan, Lawson Kathleen A., Serre Jeffery J.
Принадлежит:

A method of manufacturing a conversion element is disclosed. A precursor material is selected from one or more of lutetium, aluminum and a rare-earth element. The precursor material is mixed with a binder and a solvent to obtain a slurry. A green body is formed from the slurry and the green body is sintered to obtain the conversion element. The sintering is performed at a temperature of more than 1720° C. 1. A method of manufacturing a conversion element , the method comprising:providing a precursor material, the precursor material comprising a material selected from the group consisting of lutetium, aluminum and a rare-earth element,mixing the precursor material with a binder and a solvent to obtain a slurry;forming a green body from the slurry; andsintering the green body to obtain the conversion element, wherein the sintering is performed at a temperature of more than 1720° C.2. The method according to claim 1 , wherein sintering is performed at a temperature of less than 1780° C.3. The method according to claim 1 , wherein providing the precursor material comprises providing a first precursor material comprising lutetium claim 1 , a second precursor material comprising aluminum and a third precursor material comprising a rare-earth element.4. The method according to claim 3 , wherein the first precursor material is LuO claim 3 , the second precursor material is AlOand the third precursor material is CeO.5. The method according to claim 1 , wherein mixing the precursor material with the binder and the solvent comprises ball milling.6. The method according to claim 1 , wherein the green body comprises a green tape and the green tape is formed from the slurry via tape casting.7. The method according to claim 1 , further comprising structuring a surface of the green body prior to sintering the green body.8. The method according to claim 7 , wherein the structuring comprises forming grooves with a depth between 10 μm and 40 μm.9. The method according to claim 1 , ...

Подробнее
Номер записи: 99
13-02-2020 дата публикации

LIGHT EMITTING DEVICE AND PHOSPHOR

Номер: US20200048549A1
Автор: HONG Byungchul
Принадлежит: MITSUBISHI CHEMICAL CORPORATION

An object of the present invention is to provide an infrared light-emitting phosphor which emits light in a wavelength range where the sensitivity of a detector is high by combination with a semiconductor light-emitting element that emits light in the visible light region, and to provide an infrared light-emitting device using the infrared light-emitting phosphor. The object can be achieved with a light-emitting device including a semiconductor light-emitting element that emits ultraviolet light or visible light and a phosphor that absorbs ultraviolet light or visible light emitted from the semiconductor light-emitting element and emits light in the infrared region, wherein an emission peak wavelength in the infrared region of the phosphor emitting in the infrared region is from 750 to 1,050 nm, and the half width of an emission peak waveform is more than 50 nm. 1. A light-emitting device comprising:a semiconductor light-emitting element that emits ultraviolet light or visible light; anda phosphor that absorbs ultraviolet light or visible light emitted from the semiconductor light-emitting element and emits light in the infrared region,wherein an emission peak wavelength in the infrared region of the phosphor emitting in the infrared region is from 750 to 1,050 nm, and the half width of an emission peak waveform is more than 50 nm.2. The light-emitting device according to claim 1 ,wherein the phosphor that emits light in the infrared region consists of a phosphor having an afterglow time which is the time taken for the emission peak intensity to fall to 1/10 of the initial emission peak intensity of 10 ms or less.3. The light-emitting device according to claim 1 ,wherein the phosphor that emits light in the infrared region consists of a phosphor having a reflectance at a wavelength from 700 to 850 nm of 80% or more.4. The light-emitting device according to claim 3 ,wherein the phosphor that emits light in the infrared region has a reflectance at a wavelength from ...

Подробнее
Номер записи: 100