ЛЮМИНЕСЦЕНТНЫЙ МАТЕРИАЛ С ИСПОЛЬЗОВАНИЕМ (Y, Gd)-СОДЕРЖАЩИХ НАНОЧАСТИЦ И СВЯЗАННЫХ С ПОВЕРХНОСТЬЮ ОРГАНИЧЕСКИХ ЛИГАНДОВ

Изобретение относится к материалам-преобразователям для флуоресцентных источников света. Предлагается люминесцентный материал для светоизлучающего прибора, включающий (Y,Gd)-содержащий материал наночастиц, связанный с по меньшей мере одной молекулой органического лиганда. Предлагается также светоизлучающий прибор, в частности светоизлучающий диод, включающий указанный люминесцентный материал, и система, включающая указанный люминесцентный материал и/или указанный светоизлучающий прибор. Предложенный люминесцентный материал обладает адаптацией к различным длинам волн испускания полупроводника и областям применения светоизлучающего диода. 3 н. и 7 з.п. ф-лы, 3 ил.

ТЕРМОЛЮМИНЕСЦЕНТНАЯ И СУПЕРПАРАМАГНИТНАЯ КОМПОЗИЦИОННАЯ ЧАСТИЦА И МАРКИРОВКА, СОДЕРЖАЩАЯ ЕЕ

Изобретение относится к композиционной частице. Описана композиционная частица для применения в маркировке, содержащая по меньшей мере одну суперпарамагнитную часть и по меньшей мере одну термолюминесцентную часть, при этом композиционная частица содержит (b) термолюминесцентную центральную часть (ядро), которая по меньшей мере частично окружена (а) суперпарамагнитным материалом. Также описаны множество композиционных частиц, маркировка, изделие, краска, способ снабжения изделия маркировкой, способ из идентификации и установления подлинности изделия, прибор для осуществления способа, способ маркировки объектов. Технический результат: улучшение защиты, надежности и предотвращение фальсификации или подделки товаров или ипредметов. 9 з. и 17 н.п. ф-лы, 9 ил.

ИСТОЧНИК СВЕТА СО СВЕТОИЗЛУЧАЮЩИМ ЭЛЕМЕНТОМ

Использование: в приборах на светодиодах, испускания синего и/или ультрафиолетового излучения. Технический результат изобретения: создание источника излучения, позволяющего получать излучение в ультрафиолетовой области или в области синего цвета (от 370 нм до 490 нм), способного создавать белый свет с повышенным коэффициентом полезного действия, обеспечения возможности регулирования в широком диапазоне световых температур. Сущность: Источник света со светоизлучающим элементом, который испускает излучение в первой спектральной области, и с люминофором, который происходит из группы ортосиликатов щелочно-земельных металлов и который поглощает часть излучения источника света и испускает излучение в другой спектральной области. Согласно данному изобретению люминофор представляет собой активированный двухвалентным европием ортосиликат щелочно-земельного металла следующего состава: (2-х-у) SrO · х(Ваu, Саv) O·(1-а-b-с-d) SiO2 · aP2O5 bAl2O3 cB2O3 dGeO2: yEu2+ и/или (2-х-у) ВаО · х(Sru, Саv) O ...

МНОГОФУНКЦИОНАЛЬНЫЙ АНТИСТОКСОВЫЙ ЛЮМИНОФОР С ДЛИТЕЛЬНЫМ ПОСЛЕСВЕЧЕНИЕМ НА ОСНОВЕ ОКСИСУЛЬФИДА ИТТРИЯ

Изобретение относится к химической промышленности и может быть использовано в производстве неорганических многофункциональных антистоксовых люминофоров на основе оксисульфида иттрия, которые могут применяться как для преобразования ИК-излучения в видимое свечение, для защиты ценных бумаг и документов, бланков строгой отчетности, знаков соответствия товаров и изделий, акцизных и идентификационных марок, банкнот, так и для изготовления систем аварийного и сигнального освещения, эвакуационных, пожарных, предупреждающих, указывающих светознаков, для указателей в шахтах, тоннелях, путепроводах, метро и переходах для информационно-указательных щитов на автострадах и декоративной косметики. Люминофор на основе оксисульфида иттрия, активированный ионами титана и коактивированный ионами магния, дополнительно содержит в катионной подрешетке трехвалентные ионы иттербия и эрбия и имеет химический состав, соответствующий следующей эмпирической формуле: (Y1-X-YYbxEry)2O2S:Ti0,12,Mg0,04, где 0,01<Х<0,05 ...

Германат редкоземельных элементов в наноаморфном состоянии

Изобретение может быть использовано в электронике. Германат редкоземельных элементов состава CaLaEuGeO, где 0,05≤х≤0,15, в наноаморфном состоянии используют в качестве люминофора белого цвета свечения. Предложенное изобретение позволяет расширить номенклатуру люминофоров белого свечения, используемых для визуализации света ультрафиолетового диапазона, рентгеновского и электронного излучения в системах светодиодов белого свечения и оптических дисплеях. Предложенный люминофор обладает хорошей термоустойчивостью. 3 пр.

ЦЕННЫЙ ДОКУМЕНТ, ЗАЩИЩЕННЫЙ ОТ ПОДДЕЛКИ, СПОСОБ ОПРЕДЕЛЕНИЯ ЕГО ПОДЛИННОСТИ

Изобретение относится к области защиты ценных документов от подделки и предназначено для приборного определения подлинности защищаемых полиграфических изделий, таких как все виды ценных документов. Технический результат - повышение уровня защищенности ценного документа. Ценный документ имеет маркировку, содержащую люминесцентное соединение, обладающее люминесценцией как антистоксовой, так и по закону Стокса, состава ! Ln1-X-Y-ZYbXErYСеZMeI CМеIV DР1-DО4+D/2-C, где: MeI - Li или Na, MeIV - W или Mo, Ln - Y, La, Gd, 0,1≤x≤0,9; 0,005≤y≤0,2; 0,0001≤z≤0,01; 0,001≤с≤0,1; 0,001≤d≤0,1; либо соединение состава: Ln2-X-Y-Z YbXErYCeZO2S, где Ln - Y, La, Gd, 0 Подробнее

СМЕШАННЫЙ ЛЮМИНОФОР С ЗЕЛЕНЫМ ИЗЛУЧЕНИЕМ И КАТОДНАЯ ЭЛЕКТРОННО-ЛУЧЕВАЯ ТРУБКА

Изобретение предназначено для электроники и может быть использовано при получении дисплеев персональных компьютеров. Смешанный люминофор содержит, мас. %: InBO3: Tb 40-90; ZnS:Cu, Au, Al или ZnS:Cu, Al остальное. Люминофор может дополнительно содержать Zn2SiO4:Mn в количестве 10-30% от общей массы, при этом содержание InBO3:Tb составляет 40-80 мас.%, ZnS:Cu, Au, Al или ZnS: Cu, Al остальное. В катодной электронно-лучевой трубке использован указанный смешанный люминофор. Яркость 85-97 отн.ед., координаты цветности близки к стандартным (х = 0,290, у = 0,600), время послесвечения 3-12 мс. Эти характеристики позволяют уменьшить мерцание люминофора при его высокой яркости и цветовой чистоте. 2 с. и 6 з.п. ф-лы, 1 табл.

РАЗРЯДНАЯ ЛАМПА С ДИЭЛЕКТРИЧЕСКИМ БАРЬЕРОМ С УЛУЧШЕННОЙ ЦВЕТОПЕРЕДАЧЕЙ И СВЕТИЛЬНИК ДЛЯ КИНОФОТОСЪЕМКИ С ТАКОЙ РАЗРЯДНОЙ ЛАМПОЙ С ДИЭЛЕКТРИЧЕСКИМ БАРЬЕРОМ

Изобретением является разрядная лампа с диэлектрическим барьером с многокомпонентным люминофором. Техническим результатом является создание лампы с улучшенной цветопередачей. Многокомпонентный люминофор содержит, по крайней мере, люминофорный компонент А - активированный церием иттриевый алюминат (Y3МэВ5O12:Ce) и люминофорный компонент В - активированный европием барий-магниевый алюминат (BaMgAl10O17:Eu). Для дальнейшего улучшения цветопередачи, а также согласования спектра излучения со спектральной светочувствительностью пленки многокомпонентный люминофор дополнительно факультативно содержит люминофорную компоненту С - активированный церием и марганцем гадолиний-магний-цинковый пентаборат (Gd(Zn, Mg)B5O10:(Ce, Mn) и/или люминофорную компоненту D - активированный европием стронциевый алюминат (Sr4Al14O25:Eu). 2 н. и 17 з.п. ф-лы, 6 ил.

БЕСЦВЕТНЫЙ ФОСФОРЕСЦИРУЮЩИЙ ЛЮМИНОФОР КРАСНОГО СВЕЧЕНИЯ

Изобретение относится к фосфоресцирующим люминофорам, в частности к бесцветным при дневном освещении люминофорам, находящим применение в средствах защиты ценных бумаг и документов от фальсификации, а также в качестве излучающих веществ в электролюминесцентных устройствах. Предложенный бесцветный фосфоресцирующий люминофор красного свечения Eu(L2)является продуктом реакции соединения европия(III) с [2-(аминокарбонил)фенокси]уксусной кислотой (HL2) и последующей вакуумной сушки в печи при остаточном давлении 20 Па. Указанный люминофор имеет максимумы фосфоресценции при 18636, 14360, 16180, 16860 сми обеспечивает значительную интенсивность красного свечения люминесценции и в 40,43 раза превышающую квантовую эффективность люминесценции по сравнению с известным бесцветным фосфоресцирующим люминофором красного свечения - соединением европия(III) с салициловой кислотой. 1 ил., 1 пр.

СИНТЕЗ НАНОЧАСТИЦ, СОДЕРЖАЩИХ ВАНАДАТ МЕТАЛЛА (III)

... 1. Способ получения наночастиц с диаметром менее 30 нм, содержащих ванадат металла(III), причем указанный способ включает в себя реакцию в реакционной среде реакционноспособного источника ванадата, растворимого или диспергируемого в реакционной среде, и реакционно-способной соли металла(III), растворимой или диспергируемой в реакционной среде, при нагревании, отличающийся тем, что реакционная среда содержит воду и по меньшей мере один полиол при объемном соотношении от 20/80 до 90/10. 2. Способ по п.1, в котором наночастицы, содержащие ванадат металла(III), представляют собой необязательно допированные наночастицы ванадата металла(III). 3. Способ по п.1, в котором наночастицы, содержащие ванадат металла(III), представляют собой необязательно допированные наночастицы смешанных кристаллов ванадата/фосфата металла (III), а реакционная среда дополнительно содержит реакционно-способный источник фосфата, растворимый или диспергируемый в реакционной среде. 4. Способ по любому из пп.1-3, причем ...

СПОСОБ ФОРМИРОВАНИЯ СВЕТОНАКОПИТЕЛЬНЫХ СИСТЕМ

... 1. Способ формирования светонакопительных систем на основе донорно-акцепторных соединений путем воздействия на них в процессе синтеза дифференцированным световым потоком. 2. Способ по п. 1, отличающийся тем, что в качестве донорно-акцепторных соединений используют разнолигандные анион-радикальные комплексы редкоземельных элементов. 3. Способ по пп. 1 и 2, отличающийся тем, что в качестве разнолигандных анион-радикальных комплексов редкоземельных элементов используют соединения тербия и/или диспрозия.

СЦИНТИЛЛЯЦИОННЫЙ МАТЕРИАЛ НА ОСНОВЕ АКТИВИРОВАННОГО КРИСТАЛЛА ЙОДИДА ЛИТИЯ

Использование: для регистрации и детектирования ядерных излучений. Технический результат изобретения: высокий световой выход и энергетическое разрешение при регистрации нейтронов и гамма-квантов. Сущность: в качестве активатора предлагаемый сцинтилляционный материал на основе активированного кристалла йодида лития содержит соединения европия, химически устойчивые к расплаву йодида лития, радиус анионов которых меньше радиуса аниона йода, при следующем соотношении компонентов, % мас.: соединения европия (в пересчете на европий) - 6.10-3-9.10-2, йодид лития - остальное. 1 з.п. ф-лы, 2 табл.

Фотолюминесцентный индикатор дозы ультрафиолетового излучения

Изобретение относится к области оптических измерений и касается фотолюминесцентного индикатора дозы ультрафиолетового излучения. Индикатор представляет собой пленку люминофора, расположенную между пластинами кварца. В качестве люминофора используют комплекс трис [1-(4-(4-пропилциклогексил)фенил)октан-1,3-дионо]-[1,10-фенантролин]тербия формулыТехнический результат заключается в повышении светопропускающей способности и интенсивности люминесценции и обеспечении возможности многократного измерения дозы ультрафиолетового излучения. 1 з.п. ф-лы, 4 ил.

Улучшенный гранатовый светосостав и технология для его приготовления, а также источник света

АКТИВИРОВАННЫЕ ЛЮМИНЕСЦЕНТНЫЕ СОСТАВЫ НА ОСНОВЕ Ce3+ ДЛЯ ПРИМЕНЕНИЯ В СИСТЕМАХ ФОРМИРОВАНИЯ ИЗОБРАЖЕНИЯ

СМЕШАННООКСИДНЫЕ МАТЕРИАЛЫ

ИНФРАКРАСНЫЙ ЛЮМИНОФОР НА ОСНОВЕ ОКСИСУЛЬФИДА ИТТРИЯ

Инфракрасный люминофор на основе оксисульфида иттрия, активированный трехвалентными ионами эрбия, отличающийся тем, что, с целью уменьшения видимой антистоксовой люминесценции и повышения стоксовой ИК-люминесценции в области 1.5-1.6 мкм при возбуждении лазерным излучением диапазона 0.90-0.98 мкм, он дополнительно содержит в катионной подрешетке оксисульфида иттрия трехвалентные ионы церия и имеет химический состав, соответствующий следующей эмпирической формуле: ! Y2-x-уErxCeуO2S, ! где х=0.20-0.45; 1·10-7≤у≤5·10-3.

СПОСОБ ПОЛУЧЕНИЯ СИЛИКАТНОГО ЛЮМИНОФОРА СИНЕГО ЦВЕТА СВЕЧЕНИЯ

Изобретение относится к химической промышленности и может быть использовано в производстве люминофоров для проекционных электровакуумных приборов (ЭВП). С целью увеличения яркости свечения и повышения стойкости люминофора к электронному облучению люминофор, соответствующий составу MMgSiOEu, где М - стронций и/или кальций, и/или барий, получают путем приготовления шихты с последующим ее прокаливанием в присутствии плавней в восстановительной атмосфере, охлаждением и промывкой дистиллированной водой при температуре 15-99С до удаления плавней.

СМЕСЬ ЛЮМИНОФОРОВ И СОДЕРЖАЩАЯ ЕЕ ФЛУОРЕСЦЕНТНАЯ ЛАМПА

... 1. Смесь люминофоров, состоящая из редкоземельного люминофора красного свечения, редкоземельного люминофора зеленого свечения и редкоземельного люминофора синего свечения, при этом размер 50% люминофоров составляет от примерно 12 до 15 мкм.2. Смесь люминофоров по п.1, при этом люминофор красного свечения представляет собой люминофор YOE, люминофор зеленого свечения представляет собой по меньшей мере один из люминофоров LAP, CAT или CBT, а люминофор синего свечения представляет собой по меньшей мере один из люминофоров BAM или SCAp.3. Смесь люминофоров по п.1, при этом люминофор красного свечения представляет собой люминофор YOE, люминофор зеленого свечения представляет собой люминофор LAP, а люминофор синего свечения представляет собой люминофор BAM.4. Флуоресцентная лампа, содержащая: электроды и стеклянную оболочку, имеющую люминофорное покрытие на внутренней поверхности, причем стеклянная оболочка герметично запаяна и содержит некоторое количество ртути и инертного газа, люминофорное ...

СМЕШАННЫЙ ЛЮМИНОФОР С ЗЕЛЕНЫМ ИЗЛУЧЕНИЕМ И КАТОДНАЯ ЭЛЕКТРОЛУЧЕВАЯ ТРУБКА, В КОТОРОЙ ОН ПРИМЕНЯЕТСЯ

Использование: получение экранов и дисплеев. Сущность изобретения: Смешаный люминофор с зеленым излучением получают путем смешивания InBOTb и люминофора, который выбирается из ZuS•Cu, Au, Al и ZuS• Cu, Al, и по желанию с ZuSiO•Mn. Катодная электроннолучевая трубка, полученная с этим люминофором, имеет следующие характеристики: яркость 90 - 101 отн.ед., цветовые координаты х = 0,265 - 0,314; у = 0,593 - 0,623; время послесвечения 3 - 12 мс.

СЛОЖНЫЙ СИЛИКАТ РЕДКОЗЕМЕЛЬНЫХ ЭЛЕМЕНТОВ В НАНОАМОРФНОМ СОСТОЯНИИ

Сложный силикат редкоземельных элементов состава SrGdEuSiO(0,001≤x≤0,5) в наноаморфном состоянии в качестве люминофора красного свечения.

Фотолюминофор нейтрально-белого цвета свечения со структурой граната и светодиод на его основе

ФЛУОРЕСЦЕНТНАЯ КЕРАМИКА

... 1. Способ производства флуоресцентного керамического материала с использованием одноосного горячего прессования, указанный способ включает стадии a) выбора пигментного порошка Gd2O2S, легированного M, и M представляет собой, по меньшей мере, один элемент, выбранный из группы, состоящей из Eu, Tb, Yb, Dy, Sm, Ho, Ce и/или Pr, при этом размер зерен указанного порошка, используемого для горячего прессования, составляет от 1 до 20 мкм, и указанное горячее прессование осуществляется при температуре от 1000 до 1400°C; и/или давлении от 100 до 300 МПа; b) отжига на воздухе при температуре от 700 до 1200°C в течение периода времени от 0,5 до 30 ч. 2. Способ по п.1, где между стадией a) и стадией b) осуществляется дополнительная стадия c), при этом стадия c) включает отжиг флуоресцентного керамического материала в вакууме при температуре от 1000 до 1400°C в течение периода времени от 0,5 до 30 ч. 3. Способ по п.1 или 2, где на стадии a) нелегированный порошкообразный Gd2O2S с размером зерен от 1 ...

Способ получения катодолюминофоров

Bariumfluorohalide-Phosphor mit Kalziumionen auf der Oberfläche

New rare earth metal meta:borate-based silicate-borate phosphor

A novel silicate-borate phosphor is based on rare earth metal metaborates of formula (I). (Y, La)1xy-zCexGdyTbz(Mg, Zn, Cd)1pMnpB5q-s(Al, Ga)qXsO10 (I), where X = Si, Ge, P, Zr, V, Nb, Ta and/or W and (i) y = z = p = 0, x = 0.01 to 1.0, q = 0 to 1.0 and s = greater than 0 to 1.0; (ii) z = p = 0, x = 0.01 to 1-y, y = 0.02 to 0.80, q = 0 to 1.0 and s = greater than 0 to 1.0; (iii) p = 0, x = 0.01 to 1-y-z, y = 0 to 0.98, y+z = <= 0.99, z = 0.01 to 0.75, q = 0 to 1.0 and s = greater than 0 to 1.0; (iv) z = 0, x = 0.01 to 1-y, y = 0 to 0.99, p = 0.01 to 0.30, q = 0 to 1.0 and s = greater than 0 to 1.0; or (v) x = 0.01 to 1-y-z, y = 0 to 0.98, z = 0.01 to 0.75, x+z = <= 0.99, p = 0.01 to 0.30, q = 0 to 1.0 and s = greater than 0 to 1.0.

Niederdruckquecksilberentladungslampe

Röntgen-System mit verbesserter Bildqualität

Verfahren zur Herstellung von Lanthan-cer-und Terbiumkarbonat durch Kopräzipitation

Herstellung von Metallhalogenidephosphorpartikeln mit definierter Korngrössenverteilung mit verbesserter Pulverfliessfähigkeit

LEUCHTSTOFFLAMPE MIT REFLEKTOR UND DEREN ANWENDUNG

Verfahren zur Herstellung hoch-kristallisierter Oxidpulver

Mit Pigment überzogener roter Leuchtstoff und Verfahren zur Herstellung desselben.

Producing composite material from at least one phosphor and a polymer matrix useful for producing lighting means comprises synthesizing luminescent phosphor nanoparticles in ionic liquid, and polymerizing ionic liquid

Producing a composite material from at least one phosphor and a polymer matrix, comprises (a) carrying out microwave mediated in situ synthesis of luminescent phosphor nanoparticles in a polymerizable ionic liquid, and (b) polymerizing the polymerizable ionic liquid or (ai) evaporating the phosphor or a starting compound, (b1) gas phase depositing the phosphor as the luminescent nanoparticles in a polymerizable ionic liquid, and (c1) polymerizing the polymerizable ionic liquid. An independent claim is also included for the composite material produced by the above mentioned method.

Elektrolumineszente Leuchtstoff-Dünnschichten mit mehreren Koaktivator-Dotiersubstanzen

Beleuchtungseinheit mit mindestens einer LED als Lichtquelle

Lichtemittierende Vorrichtung und Diode

WELLENLÄNGENKONVERTIERENDE REAKTIONSHARZMASSE UND LEUCHTDIODENBAUELEMENT

Lichtaussendendes elektrisches Entladungsgefaess mit einem Luminophor

PHOSPHOR.

LICHTEMITTIERENDES BAUELEMENT MIT EINEM EU(II)-AKTIVIERTEN LEUCHTSTOFF

PHOSPHORESZIERENDE THERMOPLASTISCHE MASSE

Ladungskompensierte Nitridleuchtstoffe und deren Verwendung

Verwendung eines Leuchtstoffmaterials zum Emittieren von weißem Licht, umfassend: eine Lichtquelle, die Strahlung mit einem Peak bei 250 nm bis 550 nm emittiert, und ein Leuchtstoffmaterial, das mittels Strahlung mit der Lichtquelle verbunden ist, wobei das Leuchtstoffmaterial wenigstens eines von Ca1-a-bCeaEubAl1+aSi1-aN3, worin 0 < a ≤ 0,2, 0 ≤ b ≤ 0,2; Ca1-c-dCecEudAl1-c(Mg, Zn)cSiN3, worin 0 < c ≤ 0,2, 0 ≤ d ≤ 0,2; Ca1-2e-fCee(Li, Na)eEufAlSiN3, worin 0 < e ≤ 0,2, 0 ≤ f ≤ 0,2, e + f > 0; oder Ca1-g-h-iCeg(Li, Na)hEulAl1+g-hSi1-g+hN3, worin 0 ≤ g ≤ 0,2, 0 < h ≤ 0,4, 0 ≤ i ≤ 0,2, g + i > 0, umfasst.

Niederdruckquecksilberdampfentladungslampe.

Leuchtbauelement und Bildanzeige enthaltend ein fluoreszierendes Oxynitridmaterial

Ein Leuchtbauelement mit einer Emissionslichtquelle und einem fluoreszierenden Material, wobei das fluoreszierende Material ein fluoreszierendes Oxynitridmaterial ist, das als eine Hauptkomponente eine JEM-Phase enthält, die durch die allgemeine Formel MAI(Si6-zAlz)N10-zOz, wobei 0,1 ≤ z ≤ 3 ist, dargestellt ist, wobei- M La ist, wobei die JEM-Phase als ein Mutterkristall mit M1 als ein Lumineszenzzentrum vorliegt, wobei M1 ein oder zwei Elemente ist, die aus der Gruppe ausgewählt sind, die aus Ce, Eu und Tb besteht, mit M + M1 = 1, wobei das Verhältnis der Anzahl von Atomen von M1 und M 0,18 ≤ M1/M ≤ 10 beträgt, oder- M Ce ist.

Verfahren zur Nachbehandlung eines aktivierten Leuchtstoffes

Röntgenstrahlenverstärkerschirm sowie Leuchtstoffzusammensetzung.

Phosphormaterial und Plasma-Anzeigetafel

Verfahren zur Herstellung eines Silikatphosphors

PHOSPHOR UND DENSELBEN VERWENDENDER SCHIRM ZUM SPEICHERN EINES STRAHLUNGSBILDES.

Verfahren zur Herstellung Röntgenstrahlen verstärkender Tantalate-Phosphoren mit verbesserter Wirksamkeit.

Improved storage and recovery of inform-

The luminescent substance forming the imaging part of the method of DT 1499575 is supplied with a light scattering material, which does not absorb or only slightly absorbs excitation- or photo luminescent radiations. The scattering materials has a refractive index which is very much larger than that of the luminescent substances, and pref. consists of TiO2, BaSO4 or NaCl, but may also be gas bubbles.

Gadolinium phosphor used for digital radiography emits green luminescence when excited with radiation

A gadolinium phosphor has the formula: (Gd1-x-y-z, Tbx, Dyy, Cez)2O2S (where x = 1.2 x 10<-3> to 1.9 x 10<-2>; y = 5 x 10<-4> to 1.9 x 10<-2>; and z = 1 x 10<-8> to 8 x 10<-7>) and emits a green luminescence when excited with radiation. Independent claims are also included for the following: (i) a radiographic picture conversion screen comprising a carrier and a fluorescent layer produced from a mixture of a binder and the gadolinium phosphor; and (ii) a radiographic-forming device containing the radiographic picture conversion screen. Preferred Features: The phosphor contains 10-100 ppm zinc. The phosphor has an average particle size of 1-5 microns m.

Leuchtstoffe auf Basis Eu2+-(co-) dotierter Yttrium-Aluminium-Granat-Kristalle und deren Verwendung

Leuchtstoff, der einen mono- oder polykristallinen Yttrium-Aluminium-Granat (YAG) enthält, und der eine EU-Dotierung aufweist, charakterisiert durch die Formelbei der x einem Zahlenwert von größer 0 bis maximal 0.1, y einem Zahlenwert von 0 bis kleiner 1, z einem Zahlenwert von 0 bis kleiner 1 und w einem Zahlenwert von größer 0 bis 1-2x-y entspricht, M für Si und/oder Zr steht und RE die Elemente der Seltenerdmetalle bezeichnet.

Fluoreszenzpulver zum Herstellen von Weiß-Licht-Emittierenden-Dioden großer Helligkeit und Weiß-Licht-Emittierende Vorrichtung

Zusammensetzung eines Fluoreszenzmaterials, welches die Formel (YxTbyCez)Al5O12 hat, wobei x + y = 3, x, y 0, 0 < z < 0,5, wobei das (YxTby)Al5O12 ein Wirt desselben ist und Ce ein Aktivator desselben ist, und wobei mittels Einstellens der Metallkomponente des (YxTby)Al5O12 Wirts des Fluoreszenzmaterials ein Kristallfeld desselben moduliert werden kann, wodurch eine Wellenlänge von Licht, welches von dem Fluoreszenzmaterial emittiert wird, geändert wird.

New trivalent terbium activated rare earth metal borate phosphor

Rare earth metal borate phosphors (I) are new. A rare earth metal borate phosphor of formula (I) is new: x = 0.08 to 0.8; y = 0.05 to 0.25; x + y = 0.13 to 1.0. (Y1-x-yGdxTby)2O3.B2O3 (I).

METHOD OF PRODUCING LUMINESCENT SCREENS, LUMINESCENT SCREENS PRODUCED BY THIS METHOD AND CATHODE-RAY TUBES INCLUDING SUCH LUMINESCENT SCREENS

VERFAHREN ZUR HERSTELLUNG EINER LEUCHTSTOFFSCHICHT AUF EINEM SUBSTRAT.

LUMINESCENT SCREEN

Lichtquellesystem

Ein Lichtquellesystem, umfassend eine lichtemittierende Lichtquelle eine optische Leiterplatte; und eine Beschichtung, die farbumwandelndes Material enthält, wobei die Lichtquelle einen Nitridverbindungs-Halbleiter der Formel: IniGAjAlkN umfasst, in der i ≤ 0, j ≤ 0, k ≤ 0, und i+j+k = 1, dotiert mit verschiedenen Verunreinigungen, worin InGaN und GaN eingeschlossen sind, wobei der Halbleiter blaues Licht emittiert und ein Hauptemissionspeak des Halbleiters im Bereich von 400 nm bis 530 nm liegt, wobei die Beschichtung einen ersten Teils des von der Lichtquelle kommenden blauen Lichts durch Absorption filtert, einen zweiten Teil des von der Lichtquelle kommenden blauen Lichts aussendet, das absorbierte blaue Licht in ein anderes Licht größerer Wellenlänge konvertiert und dieses andere Licht mit dem ausgesendeten Teil des von der Lichtquelle kommenden blauen Lichts mischt, so dass eine Lichtkombination ausgestrahlt wird, wobei die optische Leiterplatte das von der Lichtquelle kommende Licht ...

PHOSPHOR, PROCESS FOR THE PREPARATION THEREOF AND A FLUORESCENT SCREEN HAVING THE PHOSPHOR

STANDARDLICHTQUELLE UND VERFAHREN ZU IHRER HERSTELLUNG

Hole-trap compensated scintillator material for computed tomography machine

Crystalline scintillator compsn. comprises Gd-Ga garnet of formula Gd3Ga5O12 having 0.05-1 wt.% of Cr as oxide to activate the scintillator to x-rays, and 0.2-0.255 wt.% Ce as a hole-trapping species, which reduces the afterglow while allowing the scintillator to withstand radiation without damage after receiving an initial radiation dose. Also claimed is a computed tomography machine having the solid state scintillator above (118) in which Cr substitutes for Ga and Ce for Gd.

PHOSPHOR, VERFAHREN ZUM SPEICHERN UND ZUM REPRODUZIEREN EINES STRAHLUNGSBILDES UND SCHIRM ZUM SPEICHERN EINES STRAHLUNGSBILDES MITTELS DIESES VERFAHRENS.

Mit Vakuum-UV-Strahlung anregbarer Licht emittierender Leuchtstoff

PHOSPHOR AND RADIATION IMAGE STORAGE PANEL EMPLOYING THE SAME

Neon-Gasentladungslampe zur Erzeugung von amberfarbenes Licht

ELEKTRISCHE ENTLADUNGSLAMPE

PHOTOSTIMULIERBARER PHOSPHOR

Verfahren zur Erhoehung der Ritzhaerte und Festigkeit von Glasgegenstaenden, insbesondere Glasflaschen

Verfahren zum Herstellen eines aus Erdalkalihalogenphosphat bestehenden,mit einwertigem Kupfer und dreiwertigem Terbium aktivierten Leuchtstoffs

Durch Vakuum-ultraviolett angeregtes grünes Phosphormaterial und eine dieses Material verwendende Vorrichtung

Diese Erfindung soll die Probleme mit herkömmlichen Phosphormaterialien überwinden, insbesondere soll sie die Probleme unzureichender Luminanz und Farbreinheit auf den Bildschirmen von Farbanzeigeeinheiten überwinden, wenn grüne Phosphormaterialien eine blaue oder rote Lichtemission aufweisen. Diese Erfindung soll Vakuum-ultraviolett angeregte grüne Phosphormaterialien bereitstellen, die Terbium-, Gadolinium-dotiertes Seltenerd-Aluminiumscandiumborat enthalten, das durch die folgende allgemeine Formel wiedergegeben wird: (Y¶1-x-y¶Gd¶x¶Tb¶y¶)Al¶3-z¶Sc¶z¶(BO¶3¶)¶4¶ (0 x < 0,5, 0 < y < 0,5, 0 < z 3). Die Phosphormaterialien dieser Erfindung können für lichtemittierende Vorrichtungen verwendet werden. Die Verwendung der Phosphormaterialien zusammen mit blauen Phosphormaterialien und roten Phosphormaterialien ermöglicht die Bildung weiß emittierender Vorrichtungen.

SZINTILLATIONSSUBSTANZEN (VARIANTEN)

Im Vakuum durch ultraviolettes Licht angeregte ultraviolette Phosphorzusammensetzung und diese verwendende lichtemittierende Vorrichtung

UV-emittierender Leuchtstoff und Lampe damit

Terbiumaktivierte Thoriumoxyd-Leuchtstoffe mit gruener Emission

Leuchtschirm

Inorganic scintillator

Preparation of sulphides and selenides

LUMINESCENT MATERIALS

... 1333835 Luminescent materials PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 19 April 1971 [21 April 1970 31 March 1971] 27230/71 Heading C4S A phosphor having an apatite structure is defined by the formula where X is Ca, Sr, Ba and/or Mg Y is La and/or Y A is Sb, Pb, Sn, Sn+Mn or Pb+Mn up to 50% of X may be replaced by Zn and/or Cd a+1À56=12+x : 2#x#0 : 4À5#y#0 4À5#p#0 : 4À5#(p+y) : 0À8#q#0À05 8#b/a#4/3 : when y=0 b/a#2 when z#a, a+b#8À66 when a#z, 10#a+b and when x=0 and 9#a+b then 1À5#y. A phosphor is prepared by firing twice at 1350‹ C. in N 2 containing 2% water a mixture of CaCO 3 , Y 2 O 3 , SiO 2 and Sb 2 O 3 . The carbonate may be replaced by the oxide or compounds which produce the oxide on heating. If Sn is present the firing atmosphere is reducing. The phosphors are used in 1.p. vapour discharge lamps. Phosphors of similar structure in which X is Zn and/or Cd, the activator is Eu and Tb and in which O is replaced by F are referred to.

LUMINESCENT MATERIAL

Improvements in and relating to calcium phosphate phosphors

... 695,175. Luminescent materials. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 17, 1951 [Oct. 26, 1950], No. 24250/51. Class 39(i) A small amount of a salt of an alkali metal, particularly sodium potassium or lithium, is added to improve the stability of luminescent calcium orthophosphate activated by manganese and trivalent cerium. The amount of alkali salt added is 0.001 to 0.05 mols. alkali oxide per mol. of CaO. The range for Na 2 O is 0.008-0.035 mols.; for Li 2 O 0.015-0.03 mols.; and for potassium 0.001- 0.05. The added salt may be a phosphate, sulphate, nitrate, carbonate or borate of sodium, potassium, lithium, rubidium, or caesium. The luminescent efficiency and required firing conditions for the various additions are described in the Specification.

Fluorescent phosphors

A phosphor comprises strontium aluminate activated by trivalent europium or trivalent terbium; the activator may be present as 0.01-0.1 mole as oxide per mole Al2O3. Up to 2 mole Y2O3 or La2O3 may also be present, together with fluxes such as NaF, KF, CaF2, LiOH, NaHCO3 or K2CO3, and alkaline earth metal fluorides and/or chlorides which may remain in the matrix. The phosphor may be prepared by grinding and firing at 2200 DEG F. for 1/2 hour two or three times. The europium phosphors are red-emissive, the terbium are green - emissive; the addition of ythrium improves brightness in response to low pressure mercury excitation (2537<\>rA), lanthanum improves the high pressure mercury vapour excitation (3130<\>rA).

Luminescent compositions

A terbium activated thorium oxyfluoride luminescent material is of a single-phase fluorite crystal structure, the proportions of Th and Tb cations and O and F anions being such that the maximum solubilities of terbium trifluoride and thorium tetrafluoride in thorium dioxide are not exceeded. Starting materials of thorium and terbium oxides and fluorides may be mixed and heated to at least 900 DEG C., preferably 1600 DEG C. in an inert atmosphere up to 20 atmospheres pressure for instance. The maximum solubility of TbF3 in ThO2 is given by Tb/(Th + Tb) = 0.05, the exact value varying with temperature and the F/Tb ratio, the single phase fluorite structure not being obtained above this, although new luminescent compositions can be obtained with higher proportions of Tb wherein a mixture occurs of the fluorite crystal structure diluted with compositions of other crystal structures; the practical lower limit is 0.0005. The practical range of F/Tb is 0.5 to 100, preferably 1 to 40 while for ...

Fluorescent phosphor composition

A luminescent material comprises strontium fluoroborate activated by europium preferably of the general formula This phosphor, with a broad U.V. excitation spectrum from about 2500 <\>rA to 3500 <\>rA with maximum about 3000 <\>rA has a narrow emission peak at about 3700 <\>rA and may be used in low-pressure mercury lamps for instance. In a method of preparation fine powders strontium nitrate, europium oxide and boric acid are dissolved in water at 80 DEG C. in the molecular proportions 0.5 Sr (NO3)2: 4H3BO3: 0.006Eu2O3. The slurry resulting from the addition of 1:1 mixture of acetone and ammonium hydroxide is cooled to below 20 DEG C., filtered and dried. 0.250 moles of SrF2 is thoroughly mixed with the precipitate and fired at 800 DEG C. for 40 mins. in an open quartz crucible in air or light oxidizing conditions followed by thorough mixing of 0.238 moles of SrF2 and firing at 890 DEG C. in an open quartz crucible under mild reducing conditions, for instance 10- ...

Improvements relating to x-ray sensitive luminescent materials

An X-ray sensitive luminescent material consists of terbium-activated lanthanum oxide, phosphate or silicate, wherein the luminescent material contains from 0.01 to 0.15, preferably 0.06 to 0.09 grm. atoms of terbium per grm. mol. of lanthanum compound. The material may be used in X-ray image intensifiers and in television transmission systems in conjunction with photocathodes. In examples of preparation the starting materials including La2O3, (NH4)2 HPO4, Tb4O7, La2O3, LaF3 and SiO2 are heated in air for 2 hours at temperatures from 600 DEG to 1200 DEG C., the reaction product pulverized and heated again in air for 2 hours at temperatures from 1150 DEG to 1400 DEG C. The product has a green emission with a sharp peak at 545 nm.

Improvements in or relating to Luminescent Compositions of Matter

... 1,175,573. Luminescent materials. WESTERN ELECTRIC CO. Inc. 21 March, 1967 [1 April, 1966], No. 13093/67. Heading C4S. [Also in Division H1] Aluminescent composition includes trivalent Yb and trivalent Tm in an amount, of the cations present, of at least 0.6% Yb ions and at least 0À01% of Tm. Cr may be present in amount 0.1 to 1.0% of the cations present. A preferred composition is (M a Yb b Tm c )-Me 5 O 12 , where M may be Y, Gd, Lu or mixtures thereof, Me may be trivalent Ga and/or Al alone or in combination with Cr in an amount 0.16 to 1À6 atom per cent of the Ga and/or A1 and a+b+c= 3, a is 0 to 2.949, preferably 1.3 to 2.87, b is 0.05 to 2.999, preferably 0.1 to 1.5 and c is 0À0008 to 1.0, preferably 0À01 to 0.6. The composition may be used in a laser and a tungsten lamp operating at 3000‹ K is a preferred pump source. Exemplary environments include ABO 4 , where A is Ca, Sr, Ba or Pb; B is Mo or W; MC 2 O 6 where M is Y, Gd, La or mixtures thereof and C may be Ti, Sn, Si, Ge, or ...

INTRAREDEXCITABLE RARE EARTH OXYFLUORIDE LUMINESCENT MATERIALS

Improvements in or relating to luminescent materials

... 697,938. Luminescent materials. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Oct. 18, 1951 [Oct. 21, 1950], No. 24331/51. Class 39(i) A luminescent material of short afterglow comprises a cerium actuated phosphate of the formula A B PO 4 where A is one or more of the metals sodium, potassium, caesium and rubidium and B is one or more of the metals calcium, strontium and barium. The cerium content is .01-5 mol. per cent, preferably 0.2 mol. per cent, in sodium barium phosphate. Specification 512,154 is referred to.

Red-luminous phosphor

A red-luminous phosphor [Y2OyS: Eu + (Zn, Cd) S:Ag] for use in color televisions is obtained by attaching a small amount of red-luminous pigment [(Zn1 Cd)S;Ag] to the surface of europium-activated red-luminous phosphor (Y2O2S:Eu), whereby the red-luminous phosphor having high luminosity and the color purity and color contrast improved is provided. ...

High lumen output flurorescent lamp with high color rendition

LUMINESCENT MATERIALS

... 1334124 Luminescent materials and uses thereof PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 19 April 1971 [25 March 1970] 24847/71 Heading C4S A method of manufacturing a luminescent oxysulphide, A 2-x B x O 2 S, wherein A is at least one of Y, Gd, La, B at least one element of A. No. 58 to 63 and 65 to 70 and 0À2>x> 0À0002, comprises preparing a polysulphide of at least one alkali metal (e.g. Na, K, Li) by adding an sulphur to aqueous solution containing at least 15% by wt. of the hydroxide(s) of the corresponding alkali metal(s), adding oxides of A and B to the polysulphide solution, and heating in the absence of air or without free access to same. The high polysulphide concentration present during heating improves the crystallization. An alumina crucible is normally used and the alkali metal hydroxide solution preferably contains at least 15% by wt. of the hydroxide and for an NaOH solution, preferably 25 molar. Optionally, between 1-5 to 2 grm. atoms of S per grm. molecule of the ...

Phosphor member, method of manufacturing phosphor member, and illuminating device

In the present invention, provided is a phosphor member capable of improving a yield and an extraction rate, in addition to high environmental tolerance, high heat resistance, high durability and a high color rendering property, by which variations of color and an amount of light are reduced, and also provided are a method of manufacturing the phosphor member and an illuminating device. Disclosed is a phosphor member prepared separately from an LED light source constituting a white illuminating device, wherein the phosphor member possesses phosphor particles and an inorganic layer having been subjected to coating and a heat treatment.

Non-radiatively pumped wavelength converter

A light source comprises an electroluminescent device that generates pump light and a wavelength converter that includes an absorbing element for absorbing at least some of the pump light. A first layer of light emitting elements is positioned proximate the absorbing element for non-radiative transfer of energy from the absorbing element to the light emitting elements. At least some of the light emitting elements are capable of emitting light having a wavelength longer than the wavelength of the pump light. In some embodiments the electroluminescent device is a light emitting diode (LED) that has a doped semiconductor layer positioned between the LED's active layer and the light emitting elements. The first doped semiconductor layer may have a thickness in excess of 20 nm. A second layer of light emitting elements may be positioned for non-radiative energy transfer from the first layer of light emitting elements.

Process for producing fluorescent substance and fluorescent substance produced thereby

The present invention provides a fluorescent substance excellent both in quantum efficiency and in temperature characteristics, and also provides a process for producing the fluorescent substance. This fluorescent substance is an oxynitride phosphor having a low paramagnetic defect density and comprising aluminum, silicon, either or both of oxygen and nitrogen, and a metal element M, provided that the metal element M is partly replaced with an emission center element R. That phosphor can be produced by the steps of: subjecting a mixture of starting materials to heat treatment under a nitrogen atmosphere so as to obtain an intermediate fired product, and then further subjecting the intermediate fired product to heat treatment under an atmosphere of nitrogen-hydrogen mixed gas.

Surface-modified silicate luminophores

A surface-modified silicate luminophore includes a silicate luminophore and a coating includes at least one of (a) a fluorinated coating including a fluorinated inorganic agent, a fluorinated organic agent, or a combination of fluorinated inorganic and organic agents, the fluorinated coating generating hydrophobic surface sites and (b) a combination of the fluorinated coating and at least one moisture barrier layer. The moisture barrier layer includes MgO, Al 2 O 3 , Y 2 O 3 , La 2 O 3 , Gd 2 O 3 , Lu 2 O 3 , and SiO 2 or the corresponding precursors, and the coating is disposed on the surface of the silicate luminophore.

Light emitting device and manufacturing method thereof

A light emitting device according to one embodiment includes a light emitting element that emits light having a wavelength of 250 nm to 500 nm and a fluorescent layer that is disposed on the light emitting element. The fluorescent layer includes a phosphor having a composition expressed by the following equation (1) and an average particle diameter of 12 μm or more. (M 1−x1 Eu x1 ) 3−y Si 13−z Al 3+z O 2+u N 21−w   (1) (In the equation ( 1 ), M is an element that is selected from IA group elements, IIA group elements, IIIA group elements, IIIB group elements except Al, rare-earth elements, and IVB group elements. x1, y, z, u, and w satisfy the following relationship. 0<x1<1, −0.1<y<0.3, −3<z≦1, −3<u−w≦1.5)

Full-color light-emitting material and preparation method thereof

A full-color light-emitting material and preparation method thereof are provided. A light-emitting material is following general formula compound (Y 1-x-y-z A x B y C z ) 2 GeO 5 , wherein 0<x≦0.05, 0<y≦0.15, 0<z≦0.15, x:y:z=1:1˜10:1˜10, A is one of Tm and Ce, B is one of Tb, Ho, Er and Dy, C is one of Eu, Pr and Sm. Preparation method is: grinding the raw material uniformly, then sintering the material at 1300˜1500 ° C. for 6˜24 h, cooling down the material to room temperature then getting the product. A full-color light-emitting material which can emit red-green-blue full-color light directly and be adapted for light-emitting device excited in ultraviolet zone without other doped material is provided. And a preparation method having simple process, stable product quality for full-color light-emitting materials is provided.

Light emitting device

A light emitting device according to one embodiment includes: a board; plural first light emitting units each including a first light emitting element and a first fluorescent layer formed on the first light emitting element having a green phosphor; plural second light emitting units each including a second light emitting element and a second fluorescent layer formed on the second light emitting element having a red phosphor; the second fluorescent layers and the first fluorescent layers being separated in a non-contact manner with gas interposed there between; and plural third light emitting units each including a third light emitting element and a resin layer formed on the third light emitting element having neither a green phosphor nor the red phosphor, the third light emitting units being disposed between the first light emitting units and the second light emitting units.

Red light-emitting flourescent substance and light-emitting device employing the same

The embodiment provides a red light-emitting fluorescent substance represented by the following formula (1): (M 1-x EC x ) a M 1 b AlO c N d   (1). In the formula (1), M is an element selected from the group consisting of IA group elements, IIA group elements, IIIA group elements, IIIB group elements, rare earth elements and IVA group elements; EC is an element selected from the group consisting of Eu, Ce, Mn, Tb, Yb, Dy, Sm, Tm, Pr, Nd, Pm, Ho, Er, Cr, Sn, Cu, Zn, As, Ag, Cd, Sb, Au, Hg, Tl, Pb, Bi and Fe; M 1 is different from M and is selected from the group consisting of tetravalent elements; and x, a, b, c and d are numbers satisfying the conditions of 0<x<0.2, 0.55<a<0.80, 2.10<b<3.90, 0<c≦0.25 and 4<d<5, respectively. This substance emits luminescence having a peak in the wavelength range of 620 to 670 nm when excited by light of 250 to 500 nm.

Phosphor particle group and light emitting apparatus using the same

Provided is a phosphor particle group of divalent europium-activated oxynitride green light emitting phosphor particles each of which is a β-type SiAlON substantially represented by a general formula: EuaSibAlcOdNe, where 0.005≦a≦0.4, b+c=12, d+e=16, wherein 60% or more of the phosphor particle group is composed of the phosphor particles in which a value obtained by dividing a longer particle diameter by a shorter particle diameter is greater than 1.0 and not greater than 3.0. A high-efficiency and stable light emitting apparatus using a β-type SiAlON, which includes a light converter using the phosphor particle group, and a phosphor particle group therefor are also provided.

Light-emitting device with a luminescent medium, corresponding lighting system comprising the light-emitting device and corresponding luminescent medium

The invention relates to a light emitting device ( 1 ) with high colour rendering comprising a wavelength converting member ( 2 ) with a luminescent medium for wavelength conversion of blue light and/or ultraviolet light ( 10 ) into red light and/or yellow and/or green light and a light source ( 3 ) emitting blue light ( 10 ) and/or ultraviolet light arranged to pump the luminescent medium, said luminescent medium essentially having a main phase of a solid state host material which is doped with Ce 3+ -ions. According to the invention the host material comprises ions of a further rare-earth material Ln, wherein the host material is selected such that the emission energy of the 5d-4f emission on Ce 3+ -ions is energetically higher than the absorption energy into an upper 4f n state of the further rare-earth material Ln, and wherein the light emission of wavelength converted light is caused by an intra-atomic 4f n -4f n transition within the ions of the further rare-earth material. The invention further relates to a corresponding lighting system comprising the light-emitting device and a corresponding luminescent medium.

Efficient led-based illumination modules with high color rendering index

An illumination module includes a light mixing cavity with an interior surface area and window that are physically separated from an LED. A portion of the window is coated with a first wavelength converting material and a portion of the interior surface area is coated with a second wavelength converting material. The window may be coated with LuAG:Ce. The window may also be coated with a third wavelength converting material with a peak emission wavelength between 615-655 nm where the spectral response of light emitted from the window is within 20% of a blackbody radiator at the same CCT. The LED may emit a light that is converted by the light mixing cavity with a color conversion efficiency ratio greater than 130 lm/W where the light mixing cavity includes two photo-luminescent materials with a peak emission wavelengths between 508-528 nm and 615-655 nm.

Green emitting material

The invention relates to an improved green emitting material of the form M I 3-x-y M II x Si 6-x Al x O 12 N 2 :Eu y , whereby M I is an earth alkali metal and M II is a rare earth metal or Lanthanum. This material can be made as a ceramic using a low temperature sintering step, resulting in a better and more uniform ceramic body.

Lamp for incandescent-like color quality

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.

Cerium and Europium Doped Phosphor Compositions and Light Emitting Devices Including the Same

Compounds of Formula I, which include both cerium and europium, may be useful as phosphors in solid state light emitting devices. Light emitting devices including such phosphors may emit warm white light.

Liquid crystal display

A liquid crystal display including a backlight and a filter, the backlight including a light-emitting device having a light-emitting element emitting blue light, and a green phosphor and a red phosphor absorbing a part of primary light emitted from the light-emitting element and emitting first secondary light and second secondary light, respectively, the green phosphor being a β-type SiAlON phosphor containing Eu and Al dissolved in a crystal of a nitride or an oxynitride having a β-type Si 3 N 4 crystal structure, and the filter including filters for colors of red (R), green (G), blue (B) and yellow (Y), respectively, arranged in a plane for subpixels provided in each pixel of the liquid crystal display, which attains excellent color reproducibility (NTSC ratio) and high luminance, can be provided.

(oxy) nitride phosphor, white light-emitting device including the (oxy) nitride phosphor, method of preparing phosphor, and nitride phosphor prepared by the method

Provided is an (oxy)nitride phosphor, which is a compound represented by Formula 1 below: {M( 1-x) Eu x } a Si b O c N d   <Formula 1> wherein, M is an alkaline earth metal; and 0<x<1, 1.8<a<2.2, 4.5<b<5.5, 0≦c<8, 0<d≦8, and 0<c+d≦8. The (oxy)nitride phosphor produces red light suitable for use in UV-LED and blue-LED type white light-emitting devices and achieves good efficiency.

(halo)silicate-based phosphor and manufacturing method of the same

Disclosed are a (halo)silicate-based phosphor and a manufacturing method of the same. More particularly, the disclosed phosphor is a novel (halo)silicate-based phosphor manufactured by using a (halo)silicate-based host material containing an alkaline earth metal, and europium as an activator.

Light emitting device

The present invention provides a light emitting device, comprising a first light emitting diode for emitting light in an ultraviolet wavelength region; at least one phosphor arranged around the first light emitting diode and excited by the light emitted from the first light emitting diode to emit light having a peak wavelength longer than the wavelength of the light emitted from the first light emitting diode; and at least one second light emitting diode for emitting light having a wavelength different from the peak wavelength of the light emitted from the phosphor.

Luminophore composition for low pressure discharge lamps

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.

Phosphor and led light emitting device using the same

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.

Silicate phosphor, method of manufacturing silicate phosphor, and light-generating device having silicate phosphor

A silicate phosphor composition is provided having a γ-phase of an orthorhombic crystal structure whose space group is Pbnm 62, and whose composition is represented by the following chemical formula: Ca 2-x-y-z M x SiO 4 :y Ce 3+ ,z N(0≦ x <0.5,0< y ≦0.1,0≦ z <0.15) In the formula, M represents at least one member selected from the group consisting of Mg, Sr, Ba, Zn, Na, Al, Ga, Ge, P, As and Fe, and N represents at least one member selected from the group consisting of Eu 2+ , Mn 2+ , Tb 3+ , Yb 2+ and Tm 3+ . The silicate phosphor has a maximum absorbance for a wavelength of about 450 nm to about 475 nm corresponding to a main part of a blue excitation light, and has a great stability at a high temperature. As such the silicate phosphor may be used in combination with a blue light source to produce a white light.

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

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).

Silicate luminescent material and its preparation method

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.

Luminescent material

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.

Luminescent Particles, Methods and Light Emitting Devices Including the Same

A luminescent particle includes a luminescent compound that is configured to perform a photon down conversion on a portion of received light. The luminescent compound includes a host compound material and an activator material that is combined with the host compound material. The activator material is provided in a quantity that limits a conversion efficiency of the luminescent compound to limit a decrease in the decrease in luminous intensity of light emitted from the luminescent compound and thus provide a given color shift of the a combined emission wavelength from a non-excited state to a steady-state excited condition.

Red nitride phosphors

Provided according to embodiments of the invention are phosphor compositions that include Ca 1-x-y Sr x Eu y AlSiN 3 , wherein x is in a range of 0.50 to 0.99 and y is less than 0.013. Also provided according to embodiments of the invention are phosphor compositions that include Ca 1-x-y Sr x Eu y AlSiN 3 , wherein x is in a range of 0.70 to 0.99 and y is in a range of 0.001 and 0.025. Also provided are methods of making phosphors and light emitting devices that include a phosphor composition according to an embodiment of the invention.

Luminescent glass, producing method thereof and luminescent device

A luminescent glass comprises glass matrix. Said glass matrix comprises a glass part and a complex part of glass and fluorescent powder, which is embedded in said glass part. Said complex part of glass and fluorescent powder comprises glass material and fluorescent powder dispersed in said glass material. Said fluorescent powder is of cerium-doped yttrium aluminum garnet series. A method for producing the luminescent glass and a luminescent device comprising the luminescent glass are also provided. The luminescent glass and the luminescent device have good luminescence reliability, high luminescence stability and long service life. The method can be carried out at a relatively low temperature.

Light-emitting device

Disclosed is a light-emitting device that exhibits good color rendering and highly efficiently emits white light in an incandescent bulb color range. The semiconductor light-emitting device ( 1 ) of the present invention includes: a semiconductor light-emitting element ( 2 ) that emits blue light; a green phosphor ( 14 ) that absorbs the blue light and emits green light; and an orange phosphor ( 13 ) that absorbs the blue light and emits orange light. The orange phosphor ( 13 ) produces an emission spectrum having a peak at a wavelength of equal to or greater than 590 nm but equal to or less than 630 nm and having a full width at half maximum of 130 nm or greater at the peak, the full width at half maximum of the emission spectrum of the orange phosphor ( 13 ) being broader than a full width at half maximum of an emission spectrum of the green phosphor ( 14 ). The orange phosphor ( 13 ) exhibits an absorptance having a peak wavelength of 420 nm or greater. ABS(530) and ABS(MAX) satisfy a relation, ABS(530)/ABS(MAX)<0.60, where ABS(MAX) is an absorptance of the orange phosphor ( 13 ) at the peak wavelength thereof, and ABS(530) is an absorptance of the orange phosphor ( 13 ) at a wavelength of 530 nm.

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

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.

Light emitting device and method for producing the same

A light emitting device includes a light emitting element that emits primary light and a wavelength conversion unit that absorbs part of the primary light and emits secondary light. In the light emitting device, the wavelength conversion unit includes a plurality of types of phosphors that emit secondary light having wavelengths different from each other, and at least one of the phosphors is a covered phosphor covered with a surface film that reflects secondary light emitted from a phosphor other than the covered phosphor.

Phosphor and leds containing same

There is herein described a phosphor for use in white pc-LED applications. The phosphor has a composition represented by (Y 1-x-y Gd x Ce y ) 3 (Al 1-z Sc z ) 5 O 12 wherein 0<x≦0.3, 0<y≦0.04 and 0<z≦0.3. White pc-LEDs containing the phosphor exhibit less sensitivity to variations in the blue emission of LED dies than pc-LEDs containing conventional YAG:Ce and YGdAG:Ce phosphors. The phosphor may used in multiple pc-LED configurations including as a sintered ceramic converter or applied as a powder dispersed in a silicone encapsulant.

Light emitting device

A light emitting device is configured to achieve a white color by mixing light from respective phosphors. The light emitting device includes: a light emitting element for emitting ultraviolet or short-wavelength visible light having a peak wavelength in a wavelength range of 380 to 420 nm; a first phosphor excited by the ultraviolet or short-wavelength visible light to emit visible light having a peak wavelength in a wavelength range of 560 nm to 600 nm; a second phosphor excited by the ultraviolet or short-wavelength visible light to emit visible light having a complementary relationship with visible light emitted by the first phosphor; and a light transmitting member which is a light transmitting layer for covering the light emitting element, and has the first phosphor and the second phosphor dispersed therein.

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

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

LIGHT CONVERTING AND EMITTING DEVICE WITH SUPPRESSED DARK-LINE DEFECTS

Light emitting systems are described. Particularly, light emitting systems and light converting components utilized within these systems are described. The light emitting system and components are formed such that dark-line defects do not interfere with the light emitting system efficiency. 1. A wavelength converting stack of semiconductor layers , comprising:{'sub': 1', '2, 'at least one absorber layer absorbing light at a wavelength λ, but not light at a longer wavelength λ,'}{'sub': 1', '2, 'at least one potential well layer converting at least a portion of light of wavelength λinto light of wavelength λ, and'}{'sub': '1', 'a window layer substantially transparent to λ, wherein the window layer comprises beryllium.'}2. The wavelength converting stack of claim 1 , wherein the at least one absorber does not include beryllium.3. The wavelength converting stack of claim 1 , wherein the at least one potential well layer does not include beryllium.4. The wavelength converting stack of claim 1 , wherein no potential well in the stack comprises beryllium.5. The wavelength converting stack of claim 1 , wherein the at least one potential well comprises II-VI semiconductor material.6. The wavelength converting stack of claim 5 , wherein the II-V semiconductor material comprises Cd claim 5 , Mg claim 5 , Zn claim 5 , and Se.7. The wavelength converting stack of claim 6 , where the II-VI semiconductor material comprises Cd claim 6 , Mg claim 6 , Zn claim 6 , Se and Te.8. The wavelength converting stack of claim 1 , wherein the window layer is substantially transparent to light at wavelength λ.9. The wavelength converting stack of claim 1 , wherein the window layer substantially blocks free carriers from exiting the stack.10. The wavelength converting stack of claim 1 , wherein the window layer is made up of between about 2.5% and about 3.5% beryllium.11. A light emitting system comprising the wavelength converting stack of semiconductor layers of .12. A light emitting system ...

LUMINESCENT MATERIAL OF SILICATE AND PREPARING METHOD THEREOF

A luminescent material of silicate is provided. The luminescent material has a formula of LnSiO:Ce,Tb,Ag, wherein, Ln is one of Y, Gd, La and Lu, 0 Подробнее

SILICATE LUMINOUS MATERIAL AND PREPARATION METHOD THEREOF

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

YTTRIUM OXIDE PHOSPHOR AND PREPARATION METHOD THEREOF

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

Light emitting module and phosphor

A light emitting module includes a light emitting device that emits ultraviolet rays or short-wavelength visible light, a blue phosphor that is excited by the ultraviolet rays or the short-wavelength visible light to emit visible light. The blue phosphor is represented by a general formula of (Ca 1-x-y ,Sr x ,Eu y ) 5 (PO 4 ) 3 Cl, wherein 0.10<x<0.60, 0.002<y<0.060, and 0.02<y/(x+y)<0.17.

Semiconductor light-emitting device, semiconductor light-emitting system and illumination fixture

The present invention provides a semiconductor light-emitting device that emits light with a specific low correlated color temperature and with a high Ra, and a semiconductor light-emitting system provided with the semiconductor light-emitting device. This object is attained by the semiconductor light-emitting device having the below-described configuration. A semiconductor light-emitting device includes a LED chip as a semiconductor light-emitting element, and a phosphor emitting light using the LED chip as an excitation source, and emits light with a correlated color temperature equal to or higher than 1600 K and lower than 2400 K. The phosphor includes at least a green phosphor and a red phosphor. In the spectrum of light emitted from the semiconductor light-emitting device, the value of the peak intensity of the light emitted by the LED chip is less than 60% of the maximum peak intensity of the light emitted by the phosphor.

Intensifying screen for x-ray detector, x-ray detector, and x-ray inspection apparatus

In an embodiment, an X-ray detector has a transmissive fluorescence generating portion, and a reflective fluorescence generating portion. The transmissive and reflective fluorescence generating portions have at least one of an intensifying screen having a phosphor layer that contains praseodymium-activated gadolinium oxysulfide phosphor particles in which a ratio of particles having a particle diameter falling in ±30% of a center particle diameter is 45% by volume or more and their filling rate is 60% by volume or more, and an intensifying screen having a phosphor layer that contains europium-activated barium fluorochloride phosphor particles in which a ratio of particles having a particle diameter falling in ±30% of a center particle diameter is 45% by volume or more and their filling rate is 45% by volume or more.

Highly reliable photoluminescent materials having a thick and uniform titanium dioxide coating

Described herein are coated photoluminescent materials and methods for preparing such coated photoluminescent materials. More particularly, provided herein are phosphors coated with titanium dioxide, methods for preparing phosphors coated with titanium dioxide, and solid-state light emitting devices which include phosphors coated with titanium dioxide.

B-SIALON AND METHOD OF MANUFACTURING THEREOF, AND LIGHT-EMITTING DEVICE

β-SiAlON represented by a general formula SiAlONwith Eu dissolved therein, whose spin density corresponding to absorption g=2.00±0.02 at 25° C. obtained by the electron spin resonance method is equal to or lower than 6.0×10spins/g. A method of manufacturing the β-SiAlON includes: a mixing step of mixing β-SiAlON materials; a baking step of baking the β-SiAlON having undergone the mixing step; a heating step of increasing the ambient temperature of the materials having undergone the mixing step from 1500° C. to a baking temperature of the baking step at a rate equal to or lower than 2° C/min.; an annealing step of annealing the β-SiAlON having undergone the baking step; and an acid treatment step of acid-treating the β-SiAlON having undergone the annealing step. The objective of the present invention is to provide β-SiAlON capable of achieving high luminescent efficiency, a method of manufacturing the β-SiAlON, and a light-emitting device using the β-SiAlON. 1. β-SiAlON represented by a general formula SiAlONwith Eu dissolved therein in a form of solid solution , wherein spin density corresponding to absorption g=2.00±0.02 at 25° C. obtained by the electron spin resonance method is equal to or lower than 6.0×10spins/g.2. A method of manufacturing the β-SiAlON as set forth in claim 1 , comprising:a mixing step of mixing β-SiAlON materials;a heating step of heating the ambient temperature of the mixed materials from 1500° C. to a baking temperature at a rate equal to or lower than 2° C./rain.;a baking step of baking the mixed materials having undergone the heating step;an annealing step of annealing the β-SiAlON having undergone the baking step; andan acid treatment step of acid-treating the β-SiAlON having undergone the annealing step.3. A method of manufacturing β-SiAlON claim 1 , comprising:{'claim-ref': {'@idref': 'CLM-00002', 'claim 2'}, 'the mixing step, heating step, baking step, annealing step, and acid treatment step according to the β-SiAlON manufacturing ...

SURFACE-TREATED FLUORESCENT BODIES AND PROCESS FOR PRODUCTION OF SURFACE-TREATED FLUORESCENT BODIES

The present invention aims to provide a surface-treated phosphor having high dispersibility and capable of significantly enhancing moisture resistance without deteriorating the fluorescence properties, and a method for producing the surface-treated phosphor. The surface-treated phosphor includes: a phosphor body; and a surface treatment layer containing at least one specific element selected from elements of the third to sixth groups of the periodic table, and fluorine, the phosphor body having the surface treatment layer on the surface thereof, wherein, when a cross section of the surface treatment layer is subjected to a thickness-wise elemental distribution analysis by a combination of an electron microscopic analysis and an energy-dispersive X-ray element analysis, a peak indicating the maximum content of the specific element appears nearer to the surface than a peak indicating the maximum fluorine content. 1. A surface-treated phosphor comprising:a phosphor body; anda surface treatment layer containing at least one specific element selected from elements of the third to sixth groups of the periodic table, and fluorine,the phosphor body having the surface treatment layer on the surface thereof,wherein, when a cross section of the surface treatment layer is subjected to a thickness-wise elemental analysis by a combination of an electron microscopic analysis and an energy-dispersive X-ray element analysis, a peak indicating the maximum content of the specific element appears nearer to the surface than a peak indicating the maximum fluorine content.2. The surface-treated phosphor according to claim 1 ,wherein the surface treatment layer is a single layer, andfluorine is detected at the peak indicating the maximum content of the specific element in the thickness-wise elemental distribution analysis of the cross section of the surface treatment layer.3. The surface-treated phosphor according to claim 1 ,wherein the surface treatment layer includes a fluoride layer, ...

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

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 ...

BORATE BASED RED LIGHT EMITTING MATERIAL AND PREPARATION METHOD THEREOF

A borate based red light emitting material is provided, which comprises a core and a shell covering the said core. Said core is nanometer metal particle, and the shell is fluorescent powder having the chemical formula of (YEuGd)BO, wherein Подробнее

RARE EARTH IONS DOPED ALKALI METAL SILICATE LUMINESCENT GLASS AND THE PREPARATION METHOD THEREOF

A preparation method of rare earth ions doped alkali metal silicate luminescent glass is provided. The steps involves: step 1, mixing the source compounds of cerium, terbium and alkali metals and putting the mixture into solvent to get a mixed solution; step 2, impregnating the nanometer micropores glass with the mixed solution obtained in step 1; step 3: calcining the impregnated nanometer micropores glass obtained in step 2 in a reducing atmosphere, cooling to room temperature, then obtaining the cerium and terbium co-doped alkali metal silicate luminescent glass. Besides, the rare earth ions doped alkali metal silicate luminescent glass prepared with aforesaid method is also provided. In the prepared luminescent glass, cerium ions can transmit absorbed energy to terbium ions under the excitation of UV light due to the co-doping of cerium ions. As a result, the said luminescent glass has higher luminous intensity than the glass only doped with terbium. 1. A preparation method of rare earth ions doped alkali metal silicate luminescent glass , comprising:step one: mixing the source compounds of cerium, terbium and alkali metal and dissolving them in a solvent to obtain a mixed solution;step two: submerging a nano-porous glass into the mixed solution obtained in step 1 for soaking;step three: sintering the soaked nano-porous glass obtained in step 2 in reductive atmosphere, then cooling to room temperature to obtain a cerium and terbium co-doped alkali metal silicate luminescent glass.2. The preparation method of claim 1 , wherein in step one the source compound of terbium is one or more selected from the group consisting of oxide claim 1 , nitrate claim 1 , chloride and acetate of terbium; the source compound of cerium is one or more selected from the group consisting of oxide claim 1 , nitrate claim 1 , chloride claim 1 , sulfate and acetate of cerium; the source compound of alkali metal is one or more selected from the group consisting of nitrate claim 1 , ...

Thermally induced flash synthesis of photoluminescent compositions

A process is disclosed for the production of persistent phosphors, comprising exposing particles of phosphor precursors for a short time to a heat source selected from a particle plasma and an open flame arising from the combustion of hydrocarbons. A process for coating a substrate with persistent phosphors is also disclosed, comprising directing a stream of phosphor precursor particles for a short time through the same types of heat source toward the substrate. Preferred phosphors are Strontium Aluminate-based doped with Dysprosium and Europium.

SEMICONDUCTOR NANOPARTICLE-BASED MATERIALS FOR USE IN LIGHT EMITTING DIODES, OPTOELECTRONIC DISPLAYS AND THE LIKE

A formulation incorporates nanoparticles, particularly quantum dot (QD) nanoparticles, into an optically clear medium (resin) to be used as a phosphor material in lighting and display applications, and as a down converting phosphor material in LEDs (light emitting diodes). The resin is compatible with QDs to allow high performance and stability of QD-based LEDs, lighting and display applications. 1. A formulation for use in the fabrication of a light emitting device , said formulation comprising or consisting essentially of:a population of semiconductor nanoparticles comprising or consisting essentially of ions from groups 13 and 15 of the Periodic Table, said nanoparticles being incorporated into an optically transparent poly(meth)acrylate encapsulation medium.2. A formulation according to claim 1 , wherein said poly(meth)acrylate encapsulation medium is derived from a (meth)acrylate monomer and a multivalent crosslinking compound.3. A formulation according to claim 2 , wherein said multivalent crosslinking compound is a trivalent crosslinking compound claim 2 , such as trimethylolpropanetrimethacrylate.4. A formulation according to claim 2 , wherein said (meth)acrylate monomer is laurylmethacrylate.5. A formulation according to claim 2 , wherein said monomer and crosslinking compound are reacted in the presence of a photoinitiator.6. A formulation according to claim 1 , wherein said poly(meth)acrylate is selected from the group consisting of polylauryl(meth)acrylate claim 1 , polystearyl(meth)acrylate claim 1 , polytrimethylsilyl (meth)acrylate claim 1 , polytrimethylsilyloxyalkyl(meth)acrylate claim 1 , polyglycidyl(meth)acrylate claim 1 , methyl(meth)acrylate claim 1 , and combinations thereof.7. A formulation according to claim 1 , wherein said poly(meth)acrylate is polylaurylmethacrylate.8. A formulation according to claim 1 , wherein said semiconductor nanoparticles contain one or more semiconductor materials selected from the group consisting of InP claim 1 ...

WAVELENGTH CONVERSION ELEMENT, LIGHT SOURCE, AND BACKLIGHT UNIT FOR LIQUID CRYSTALS

Provided is a wavelength conversion element that can prevent damage to the wavelength conversion element during the use of the light source and reduce the decrease in intensity of light emitted from the light source equipped with the wavelength conversion element during the use of the light source. The wavelength conversion element includes a wavelength conversion substrate and a reflective layer . The wavelength conversion substrate , upon incidence of excitation light L, absorbs part of the excitation light L to emit light of different wavelength from the excitation light L. The reflective layer is disposed on one surface of the wavelength conversion substrate . The reflective layer is made of a metal or an alloy. 1. A wavelength conversion element comprising:a wavelength conversion substrate that, upon incidence of excitation light, absorbs part of the excitation light to emit light of different wavelength from the excitation light; anda reflective layer disposed on one surface of the wavelength conversion substrate and made of a metal or an alloy.2. The wavelength conversion element according to claim 1 , further comprising a reflection suppression layer formed on the other surface of the wavelength conversion substrate to suppress the reflection of light entering the wavelength conversion substrate from the other surface thereof.3. The wavelength conversion element according to claim 2 , wherein the reflection suppression layer is formed of a stack including a low-refractive index layer of relatively low refractive index and a high-refractive index layer of relatively high refractive index alternately stacked.4. The wavelength conversion element according to claim 1 , wherein the reflective layer is made of a metal selected from the group consisting of Ag claim 1 , Al claim 1 , Au claim 1 , Pd claim 1 , and Ti or an alloy containing at least one metal selected from the group consisting of Ag claim 1 , Al claim 1 , Au claim 1 , Pd claim 1 , and Ti.5. The ...

White Light Emitting Glass-Ceramic and Production Method Thereof

A white light emitting glass-ceramic. The chemical formula of the glass-ceramic is aSiO.bAlO.cNaF.dCeF.nDyF.mAg, wherein a, b, c, d, n and m are, by mol part, 25-50, 15-30, 10-30, 10-25, 0.01-1 and 0.01-1, respectively, and a+b+c+d-100. A method for producing said glass-ceramic is also provided. Silver ion is doped in the glass-ceramic in the form of silver particles by means of sintering and reduction annealing treatment, and thus the luminescence properties of rare earth ion is improved. 1. A glass ceramic emitting white light , having a chemical formula of:{'br': None, 'i': a', '.b', '.c', 'd', '.n', '.m, 'sub': 2', '2', '3', '3', '3, 'SiOAlONaF.CeFDyFAg,'}wherein a, b, c, d, n and m represent molar parts, and the values of a, b, c, d, n and m are: a is 25˜50, b is 15˜30, c is 10˜30, d is 10˜25, n is 0.01˜1, m is 0.01˜1, and a+b+c+d=100.2. The glass ceramic emitting white light according to claim 1 , wherein the values of a claim 1 , b claim 1 , c claim 1 , d claim 1 , n and m are: a is 35˜50 claim 1 , b is 20˜30 claim 1 , c is 10˜20 claim 1 , d is 10˜20 claim 1 , n is 0.1˜1.3. The glass ceramic emitting white light according to claim 1 , wherein m is 0.01˜0.5.4. A method for producing a white light emitting glass ceramic claim 1 , comprising:{'sub': 2', '2', '3', '3', '3', '3', '2', '2', '3', '3', '3, 'providing raw materials SiO, AlO, NaF, CeF, DyFand AgNOin a stoichiometric ratio according to a chemical formula of aSiO.bAlO.cNaF.dCeF.nDyF.mAg, milling and mixing the raw materials to produce a mixed powder, wherein a, b, c, d, n and m represent molar parts, and the values of a, b, c, d, n and m are: a is 25˜50, b is 15˜30, c is 10˜30, d is 10˜25, n is 0.01˜1, m is 0.01˜1, and a+b+c+d=100;'}calcinating the mixed powder to produce a glass precursor; and {'br': None, 'i': a', '.b', '.c', 'd', '.n', '.m, 'sub': 2', '2', '3', '3', '3, 'SiOAlONaF.CeFDyFAg.'}, 'reductively annealing the glass precursor in a reductive atmosphere, and cooling to produce the white light ...

METHOD OF PRODUCING COATED PHOSPHOR, COATED PHOSPHOR AND WHITE LIGHT SOURCE

To provide a coated phosphor having good phosphor characteristics that can maintain light emitting characteristic for a long period of time. A mixing process is prepared in which a phosphor and aluminum alkoxide are mixed in a solvent so that the phosphor is coated with an aluminum oxide formed from the aluminum alkoxide, and the phosphor contains Group II element (M), europium (Eu), silicon (Si) and oxygen (O) in atomic weight ratios represented by the following composition formula (1): 2. The method of producing a coated phosphor according to claim 1 , wherein the phosphor and the aluminum alkoxide are mixed in a solvent so as to allow aluminum in the aluminum oxide to have an atomic weight ratio relative to the Group II element (atomic weight of aluminum/ atomic weight of Group II element) in the phosphor in a range from 0.10 to 0.29.3. The method of producing a coated phosphor according to claim 2 , wherein in the mixing step claim 2 , the phosphor and the aluminum alkoxide are mixed in the solvent at a temperature in a range from to 30 to 50° C.4. The method of producing a coated phosphor according to claim 2 , wherein in the mixing step claim 2 , the phosphor and the aluminum alkoxide are reacted with each other in the solvent for 30 to 90 minutes.7. The coated phosphor according to claim 6 , wherein aluminum in the aluminum oxide has an atomic weight ratio relative to the Group II element (atomic weight of aluminum/atomic weight of Group II element) in the phosphor in a range from 0.10 to 0.29. 1. Field of the InventionThe present invention relates to a method of producing a coated phosphor in which a phosphor is coated with a coating material, such a coated phosphor and a white light source.2. Description of the Related ArtIn an attempt to carry out a metal coating process on a phosphor having low moisture resistance, for example, Patent Literature 1 (JP-A No. 2007-23221) has proposed a technique (sol-gel method) which utilizes a hydrolysis reaction of metal ...

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

Embodiments include luminescent materials and associated production methods. The material includes a crystal borate having a first substitutable element, neodymium substituted for the first substitutable element at a first substitution percentage of at least about 20 percent, and ytterbium substituted for the first substitutable element at a second substitution percentage. The material also may include chromium substituted for a second substitutable element. 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 substitutable element;neodymium substituted for the substitutable element at a first substitution percentage of at least about 20 percent; andytterbium substituted for the substitutable element at a second substitution percentage.2. The luminescent material of claim 1 , wherein the borate has a formula MeXBO claim 1 , and wherein:Me is the substitutable element, which is selected from a group consisting of yttrium, lanthanum, gadolinium, lutetium, and a mixture thereof,X is an element selected from a group consisting of aluminum, scandium, and gallium,B is boron, andO is oxygen.3. The luminescent material of claim 2 , further comprising chromium substituted for X at a third substitution percentage up to 100 percent.4. The luminescent material of claim 1 , wherein the borate has the formula YAlBO claim 1 , where Y is the substitutable element yttrium claim 1 , Al is aluminum claim 1 ...

SILICATE FLUORESCENT MATERIAL AND PREPARATION METHOD THEREOF

A silicate fluorescent material is provided. The general chemical formula of the luminescent material is LnSiO:Tb, M, wherein Ln represents at least one of the elements selected from Y, Gd, La or Lu, M represents at least one of the nanoparticles selected from Ag, Au, Os, Ir, Pt, Ru, Rh or Pd, the mole ratio of Tb to Ln is greater than 0 but not greater than 0.25. The porous glass containing metal nanoparticles is prepared by introducing metal nano ions into the porous glass and extracting the uniformly dispersed metal nanoparticles from the porous glass via a chemical reduction method. A silicate fluorescent material with enhanced luminescence is obtained by substituting SiOwhich is the raw material in the process for preparing the silicate fluorescent material via the conventional high temperature solid phase sintering with the porous glass containing metal nanoparticles. The performance of the silicate fluorescent material is better and the light emitting efficiency of the silicate fluorescent material is higher compared with the conventional silicate fluorescent material. 2. A preparation method of the silicate fluorescent material according to claim 1 , comprising following steps:preparing an aqueous solution containing M ions;immersing a porous glass into the solution containing M ions;immersing the obtained porous glass into a reducing agent solution to obtain a porous glass containing M;{'sub': 2', '5, 'providing the porous glass containing M, a LnSiOraw material, and Tb source compounds according to the mole ratio of Tb to Ln of greater than 0 but less than or equal to 0.25, and grinding to obtain a mixture powder; and'}{'sub': 2', '5, 'sintering the mixture powder in reducing atmosphere, at a temperature of 1300° C. to 1600° C. for 1 to 8 hours, and then cooling to room temperature to obtain the silicate fluorescent material having the chemical formula of LnSiO:Tb, M.'}3. The preparation method of the silicate fluorescent material according to claim 2 , ...

WHITE LIGHT EMITTING DIODE (LED) LIGHTING DEVICE DRIVEN BY PULSE CURRENT

A white LED lighting device driven by a pulse current is provided, which consists of blue, violet or ultraviolet LED chips, blue afterglow luminescence materials A and yellow luminescence materials B. Wherein the weight ratio of the blue afterglow luminescence materials A to the yellow luminescence materials B is 10-70 wt %:30-90 wt %. The white LED lighting device drives the LED chips with a pulse current having a frequency of not less than 50 Hz. Because of using the afterglow luminescence materials, the light can be sustained when an excitation light source disappears, thereby eliminating the influence of LED light output fluctuation caused by current variation on the illumination. At the same time, the pulse current can keep the LED chips being at an intermittent work state, so as to overcome the problem of chip heating. 1. A white LED lighting device driven by a pulse current , characterized in thatthe white LED lighting device comprises blue, violet or ultraviolet LED chips and luminescence material, the luminescence material being a combination of blue afterglow luminescence material A and yellow luminescence material B, a the yellow luminescence material B being able to emit light under excitation of the blue, violet or ultraviolet LED chips and/or excitation of the blue afterglow material B,a weight ratio (A:B) between the blue afterglow luminescence material A and the yellow luminescence material B being 10˜70 wt %:30˜90 wt %,the white LED lighting device driving the LED chips with a pulse current having frequency of not less than 50 Hz.2. The white LED lighting device driven by a pulse current according to claim 1 , wherein a weight ratio (A:B) between the blue afterglow luminescence material A and the yellow luminescence material B is 20˜50 wt %:50˜80 wt %.3. The white LED lighting device driven by a pulse current according to claim 1 , wherein the blue claim 1 , violet or ultraviolet LED chips are internally packed chips in the white LED lighting device ...

ALUMINATE PHOSPHORS

The invention relates to compounds of the general formula (I) SrLuSiAlO:Ce(I) where x stands for a value from the range from 0.01 to 0.1 and a process for the preparation of these phosphors, and the use thereof as conversion phosphors or in lamps. 1. Compound of the formula I{'br': None, 'sub': 2-x', '4', '12, 'SrLuSiAlO:Cex\u2003\u2003(I)'}wherex stands for a value from the range from 0.01 to 0.15.2. Compound according to claim 1 , characterised in that x stands for a value from the range from 0.015 to 0.12 claim 1 , preferably from the range from 0.016 to 0.10.3. Process for the preparation of a compound according to claim 1 , comprising the following process steps:a) mixing of lutetium-, cerium-, aluminium-, strontium- and silicon-containing materials,b) addition of at least one further inorganic and/or organic substance,c) thermal aftertreatment of the cerium-activated compound.4. Process according to claim 3 , characterised in that the compounds are prepared by wet-chemical methods from inorganic and/or organic metal and/or rare-earth salts by means of sol-gel methods claim 3 , precipitation methods and/or drying methods claim 3 , preferably spray drying.5. Process according to claim 3 , characterised in that the inorganic or organic substances (process step b) are selected from the group of the ammonium halides claim 3 , alkaline-earth metal fluorides claim 3 , such as calcium fluoride claim 3 , strontium fluoride or barium fluoride claim 3 , borates claim 3 , boric acid claim 3 , carbonates claim 3 , preferably ammonium hydrogencarbonate claim 3 , alcoholates claim 3 , such as oxalates claim 3 , and/or silicic acid esters claim 3 , such as TEOS.6. Mixture comprising at least one compound of the formula I according to and at least one red-emitting phosphor.7. Mixture according to claim 6 , characterised in that said at least one red-emitting phosphor is selected from Ce-doped garnets claim 6 , Eu-doped thiogallates claim 6 , Eu-doped sulfoselenides and Eu- and ...

METHOD OF FORMING LIGHT CONVERTING LAYER, METHOD OF MANUFACTURING LIGHT CONVERTING MEMBER, AND METHOD OF MANUFACTURING LIGHT EMITTING DEVICE

Provided Is a method of forming a light converting layer capable of uniformly distributing fluorescent material particles, a method of manufacturing a light converting member capable of distributing fluorescent material particles, and a method of manufacturing a light emitting device capable of controlling color irregularities. The method of forming a light converting member comprising steps of, preparing fluorescent material particles, forming a bonding layer made of a resin on a base body; incorporating the fluorescent material particles in the bonding layer; and hardening the bonding layer. 1. A method of forming a light converting member comprising steps of:preparing fluorescent material particles;forming a bonding layer made of a resin on a base body;incorporating the fluorescent material particles in the bonding layer; andhardening the bonding layer.2. The method of forming a light converting layer according to claim 1 , wherein in the step of incorporating the fluorescent material particles in the bonding layer claim 1 , a maximum amount of fluorescent material particles is incorporated in the bonding layer.3. The method of forming a light converting layer according to further comprising claim 2 , after the step of incorporating the fluorescent material particles in the bonding layer claim 2 , a step of removing an excess amount of fluorescent material particles which are adhered on the bonding layer without being incorporated in the bonding layer.4. The method of forming a light converting layer according claim 1 , wherein in the step of incorporating the fluorescent material particles in the bonding layer claim 1 , the fluorescent material particles prepared in the preparing fluorescent material particles are circulated to be incorporated in the bonding layer.5. A method of manufacturing a light converting member comprising a step of forming a light converting layer according to the method of forming a light converting layer according to in which the base ...

METAL NANO PARTICLES DOPED WITH SILICATE LUMINESCENT MATERIALS AND PREPARATION METHODS THEREOF

Metal nano particles doped with silicate luminescent materials and preparation methods thereof are provided. The luminescent materials are represented by the general formula: (SrAEu)SiO:Dz@M, wherein A is one or two selected from alkaline-earth metal elements, D is F or Cl, @ is for coating, M is one or two selected from Ag, Au, Pt, Pd or Cu metal nano particles, 0≦x≦0.5, 0.001 Подробнее

Color Adjustable Luminescent Powder and Preparation Method Thereof

A color-adjustable luminescent powder is provided, the chemical general formula of which is (YGdEu)O·xZnAlO, wherein 0≦a≦0.99, 0≦b≦0.99, 0.01≦c≦0.08, provided that a+b+c=1 and a and b are not 0 simultaneously; x is the molar ratio between ZnAlO and (YGdEu)O, 0.01≦x≦0.20, and 0.001≦m≦0.05. A preparation method of the above luminescent powder is also provided, which comprises the following steps: adding an aqueous alcohol solution containing a complexing agent, and a surfactant to a mixed solution containing needed components to obtain a precursor solution, then aging the precursor solution, undergoing calcination treatment and cooling to obtain the said luminescent powder. 1. A color-adjustable fluorescent powder , wherein the color-adjustable fluorescent powder has a chemical formula of (YGdEu)O.xZnAlO , wherein 0≦a≦0.99 , 0≦b≦0.99 , 0.01≦c≦0.08 , and a+b+c=1 ,a and b are not simultaneously 0 , x is a molar ratio of ZnAlO to (YGdEu)O , 0.01≦x≦0.20 , and 0.001≦m≦0.05.2. A method for preparing a color-adjustable fluorescent powder , comprising the steps of:{'sup': 2+', '3+', '3+', '3+', '3+', '3+', '3+', '3+', '3+, 'sub': a', 'b', 'c', '2', '3, 'preparing a solution of Znand Al, and preparing a solution of Y, Eu and Gd or of Eu and Gd or of Y and Eu according to molar ratio of corresponding elements in a chemical formula of (YGdEu)O;'}{'sub': a', 'b', 'c', '2', '3', '(1-m)', 'm', '(1-m)', 'm', 'a', 'b', 'c', '2', '3, 'taking the above solutions according to corresponding molar ratio in a chemical formula of (YGdEu)O. xZnAlO, wherein 0≦a≦0.99, 0≦b≦0.99, 0.01≦c≦0.08, and a+b+c=1, a and b are not simultaneously 0, x is a molar ratio of ZnAlO to (YGdEu)O, 0.01≦x≦0.20, and 0.001≦m≦0.05; and adding an alcohol-water mixed solution contain a complexing agent, and a surfactant to give a precursor solution; and'}aging the precursor solution, calcinating, cooling and milling to give the color-adjustable fluorescent powder.3. The method for preparing a color-adjustable ...

Oxynitride-based phosphor and light emitting device including the same

There are provided an oxynitride-based phosphor and a light emitting device including the same, the oxynitride-based phosphor containing at least calcium (Ca), barium (Ba), silicon (Si), oxygen (O), and nitrogen (N) as host material components in a host material and having a rare-earth element dissolved in the host material as an activator, wherein the rare-earth element is at least one from a group consisting of manganese (Mn), cerium (Ce), praseodymium (Pr), neodymium (Nd), samarium (Sm), europium (Eu), gadolinium (Gd), dysprosium (Dy), terbium (Tb), holmium (Ho), erbium (Er), thulium (Tm), and ytterbium (Yb), and the host material has a monoclinic crystal structure in which a crystal lattice according to a peak of an X-ray powder diffraction pattern has values of a=7.076, b=23.888, c=4.827, α=y=90°, and β=109.110°.

Oxynitride luminescent material, preparation method thereof and illumination light source made from such material

A nitrogen oxide luminescence material, with chemical formula: M 1−y X 4−x Z 1+x O x N 7−x x: R y , in which M represents one or several alkali, alkaline earth, rare earth and transition metals. X represents Si with one or several of Si, Ge, B and Al. Z represents Al with one or several of Al, Ga, In. R represents one or several of luminescence center elements Eu, Ce, Tb, Yb, Sm, Pr and Dy. In the formula, 0≦x<0.5, 0<y<1.0. The luminescence material can be excited by ultraviolett, near ultraviolet or blue light, and emits yellow or red light with wavelength between 500-750 nm. With the ultraviolet, near ultraviolet or blue lights, and other types of luminescence materials, such as green fluorescent powder, a new white LED can be obtained. The luminescence material has a wider excitation spectrum range, and is efficient and stable. Preparation is simple, easy to mass-produce and pollution-free.

NIGHT VISION IMAGING SYSTEM (NVIS) COMPATIBLE LIGHT EMITTING DIODE

The present disclosure is directed to a LED assembly that is compatible for use with a night vision imaging system, Such LEDs may emit energy between 400 and 600 nm of the electromagnetic spectrum while limiting energy emissions between 600 and 1200 nanometers. Near infrared photochemistry is incorporated directly into the lens or encapsulant of an LED with an opaque package that limits transmission of visible and near infrared energy. 1. A method for making a night vision imaging system-compatible LED assembly , the method comprising the steps of:attaching a light emitting die onto an opaque package;incorporating near infrared absorbers into an encapsulant; andmolding the encapsulant onto the light emitting die.2. The method of claim 1 , wherein the step of incorporating near infrared absorbers includes near infrared absorbers comprising a metal dithiolene claim 1 , a rylene claim 1 , a porphyrin claim 1 , a phthatocyanine claim 1 , a naphthalocyanine claim 1 , or some combination thereof.3. The method of claim 1 , wherein the step of incorporating near infrared absorbers includes near infrared absorbers that substantially absorb energy between 600 and 1200 nanometers of the electromagnetic spectrum.4. A method for making a night vision imaging system compatible LED assembly claim 1 , the method comprising the steps of:attaching a light emitting die onto an opaque package;incorporating near infrared absorbers into a polymeric lens; andenclosing the light emitting die with the polymeric lens.5. The method of claim 4 , wherein the step of incorporating near infrared absorbers includes near infrared absorbers comprising a metal dithiolene claim 4 , a rylene claim 4 , a porphyrin claim 4 , a phthalocyanine claim 4 , a naphthalocyanine claim 4 , or some combination thereof.6. The method of claim 4 , wherein the step of incorporating near infrared absorbers includes near infrared absorbers that substantially absorb energy between 600 and 1200 nanometers of the ...

Silicon Nitride Powder for Siliconnitride Phosphor, CaAlSiN3 Phosphor Using Same, Sr2Si5N8 Phosphor Using Same, (Sr, Ca)AlSiN3 Phosphor Using Same, La3Si6N11Phosphor Using Same, and Methods for Producing the Phosphors

Provided are: a silicon nitride powder for siliconitride phosphors with higher luminance, which can be used for a fluorescent display tube (VFD), a field emission display (FED), a plasma display panel (PDP), a cathode ray tube (CRT), a light emitting diode (LED), and the like; a CaAlSiNphosphor, an SrSiNphosphor, an (Sr, Ca)AlSiNphosphor and an LaSiNphosphor, each using the silicon nitride powder; and methods for producing the phosphors. The present invention relates to a silicon nitride powder for siliconitride phosphors, which is characterized by being a crystalline silicon nitride powder that is used as a starting material for producing a siliconitride phosphor that includes silicon element and nitrogen element but does not contain oxygen element as a constitutent element, and which is characterized by having an oxygen content of 0.2% by weight to 0.9% by weight; a CaAlSiNphosphor, an SrSiNphosphor, an (Sr, Ca)AlSiNphosphor and an LaSiNphosphor, each using the silicon nitride powder; and methods for producing the phosphors. 112-. (canceled)13. A crystalline silicon nitride powder for siliconitride phosphors , which is used as a raw material for producing a siliconitride phosphor comprising a silicon element and a nitrogen element but no oxygen element as a constituent element , an oxygen content of said silicon nitride powder being 0.2% by weight to 0.8% by weight.14. The silicon nitride powder for the siliconitride phosphors according to claim 13 , wherein the silicon nitride powder has an average particle diameter of 1.0 μm to 12 μm.15. The silicon nitride powder for the siliconitride phosphors according to claim 13 , wherein the silicon nitride powder has a specific surface area of 0.2 m/g to 4.0 m/g.16. The silicon nitride powder for the siliconitride phosphors according to claim 13 , wherein the siliconitride phosphor is a CaAlSiNphosphor claim 13 , a SrSiNphosphor claim 13 , a (Sr claim 13 , Ca)AlSiNphosphor claim 13 , or a LaSiNphosphor.17. A method for ...

Green to Yellow Light-Emitting Aluminate Phosphors

A green and yellow emitting lutetium aluminate based photoluminescent material having the formula (LuGdCe)BAlOCwherein: B is one or more of Mg, Sr, Ca or Ba; C is F, Cl, Br or I; 0 Подробнее

Borate luminescent materials, preparation methods and uses thereof

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.

LUMINESCENT SUBSTANCE AND LIGHT SOURCE HAVING SUCH A LUMINESCENT SUBSTANCE

A blue to yellow emitting phosphor from the class of orthosilicates, which substantially has the structure EA2SiO4:D, wherein the phosphor comprises as component EA at least one of the elements EA=Sr, Ba, Ca or Mg alone or in combination, wherein the activating doping D consists of Eu and wherein a deficiency of SiO2 is introduced, such that a modified sub stoichiometric orthosilicate is present. 1. A blue to yellow emitting phosphor from the class of orthosilicates , which substantially has the structure EA2SiO4:D , wherein the phosphor comprises as component EA at least one of the elements EA=Sr , Ba , Ca or Mg alone or in combination , wherein the activating doping D consists of Eu and wherein a deficiency of SiO2 is introduced , such that a modified sub stoichiometric orthosilicate is present.2. The phosphor as claimed in claim 1 , wherein the orthosilicate is an orthosilicate stabilized with SE and N claim 1 , where SE=rare earth metal claim 1 , such that the stoichiometry corresponds to EA2 x aSExEUaSi1 yO4 x 2yNx.3. The phosphor as claimed in claim 1 , wherein SE=La or Y alone or in combination.4. The phosphor as claimed in claim 2 , wherein the proportion a of the Eu is between a=0.01 and 0.20.5. The phosphor as claimed in claim 1 , wherein EA contains Sr and/or Ba with at least 66 mol % claim 1 , in particular with a Ca proportion of a maximum of 5 mol % and in particular with an Mg proportion of a maximum of 30 mol %.6. The phosphor as claimed in claim 1 , wherein the proportion x is between 0.003 and 0.02.7. The phosphor as claimed in claim 1 , wherein the factor y crucial for the deficiency is in the range of 0 Подробнее

Yttrium aluminum garnet phosphor, method for preparing the same, and light-emitting diode containing the same

The present invention relates to yttrium aluminum garnet phosphor, a method of preparing the same and a light-emitting diode containing the same. The yttrium aluminum garnet phosphor of the present invention is represented by the following formula (I): 206. The yttrium aluminum garnet phosphor material of claim 1 , wherein 0.06≦b≦..306. The yttrium aluminum garnet phosphor material of claim 1 , wherein 0.2≦b≦..4. The yttrium aluminum garnet phosphor material of claim 1 , wherein M is at least one selected from the group consisting of cerium claim 1 , terbium claim 1 , and europium.5. The yttrium aluminum garnet phosphor material of claim 1 , wherein M is Ce.6. The yttrium aluminum garnet phosphor material of claim 1 , which is an yttrium aluminum garnet phosphor ceramic plate.7. A method of manufacturing an yttrium aluminum garnet phosphor material claim 1 , comprising:(A) providing a precursor powder that includes yttrium, aluminum and a metal, where the metal is at least one selected from the group consisting of Ce, Dy, Gd, Eu, Tb, La, Pr, Nd and Sm;(B) pre-sintering the precursor powder to obtain a phosphor precursor;(C) adding a silicon precursor in the phosphor precursor; and(D) sintering a mixture of the silicon precursor and the phosphor precursor to obtain the yttrium aluminum garnet phosphor material.8. The method of claim 7 , wherein the phosphor precursor is prepared by a process including chemical co-precipitation method claim 7 , solid state reaction method claim 7 , sol-gel method claim 7 , spray pyrolysis method claim 7 , combustion method claim 7 , hydrothermal synthesis claim 7 , sintering method or microwave-assisted combustion method.9. The method of claim 7 , wherein the step (A) is performed by providing and mixing an aluminum precursor claim 7 , an yttrium precursor and a metal precursor to form the precursor powder.10. The method of claim 9 , wherein the aluminum precursor is aluminum nitrate or aluminum oxide claim 9 , the yttrium precursor ...

LIGHT EMITTING DEVICE

According to one embodiment, a light emitting device includes a semiconductor light emitting element, a mounting member, a first wavelength conversion layer, and a first transparent layer. The semiconductor light emitting element emits a first light. The semiconductor light emitting element is placed on the mounting member. The first wavelength conversion layer is provided between the semiconductor light emitting element and the mounting member in contact with the mounting member. The first wavelength conversion layer absorbs the first light and emits a second light having a wavelength longer than a wavelength of the first light. The first transparent layer is provided between the semiconductor light emitting element and the first wavelength conversion layer in contact with the semiconductor light emitting element and the first wavelength conversion layer. The first transparent layer is transparent to the first light and the second light. 1. A light emitting device , comprising:a semiconductor light emitting element to emit a first light;a mounting member, the semiconductor light emitting element being placed on the mounting member;a first wavelength conversion layer provided between the semiconductor light emitting element and the mounting member in contact with the mounting member, the first wavelength conversion layer absorbing the first light and emitting a second light having a wavelength longer than a wavelength of the first light; anda first transparent layer provided between the semiconductor light emitting element and the first wavelength conversion layer in contact with the semiconductor light emitting element and the first wavelength conversion layer, the first transparent layer being transparent to the first light and the second light,an absolute value of a difference of a refractive index of a portion of the semiconductor light emitting element contacting the first transparent layer and a refractive index of the first transparent layer is larger than an ...

Phosphor and light emitting device

The present invention provides a phosphor emitting green fluorescence when being effectively excited by excitation light in a wavelength range from blue light to near-ultraviolet light, having an emission intensity that does not vary significantly with variation in the wavelength of the excitation light, and being manufactured easily. The phosphor includes a chemical structure represented by the following general formula (A): A(M 1-a-x Eu a Mn x )L(Si 1-b Geb) 2 O 7   , (A), where A is one or more elements selected from Li, Na, and K, M is one or more elements selected from Mg, Ca, Sr, Ba, and Zn, L is one or more elements selected from Ga, Al, Sc, Y, La, Gd, and Lu, a is a numerical value satisfying 0.001≦a≦0.3, b is a numerical value satisfying 0≦b≦0.5, and x is a numerical value satisfying 0≦x≦0.2.

LUMINSCENT MATERIAL FOR SOLID-STATE SOURCES OF WHITE LIGHT

A luminescent material, containing yttrium oxide, oxides of rare-earth metals, as well as aluminium, gallium and indium oxides in a ratio that produces compounds corresponding to the general formula: 115.-. (canceled)16. A luminescent material for solid sources of white light , based on blue-emission light diodes InGaN , wherein the material contains yttrium oxide , oxides of rare-earth metals as well as aluminium , gallium and indium oxides , wherein the material has the formula of:{'br': None, 'sub': 1-x-y-z', 'x', '0', 'y', 'z', '3-α', '1-p-q', 'p', 'q', '5', '12-1.5α, '[(YCeΣ(Ln-1)Σ(Ln-2)](AlGaIn)O,'}{'sub': '12-1.5.60', 'wherein α is a value in the range of 0.20≦α≦2.80 such that the stoichiometric index of oxygen varies in the range of 11.70≧O≧7.80;'}wherein x is the atomic fraction of cerium in the range of 0.0010;wherein p and q include atomic fractions of gallium and indium in an aluminium sub-lattice, wherein p varies in the range of 0 Подробнее

RED FLUORESCENT MATERIAL, METHOD FOR PRODUCING RED FLUORESCENT MATERIAL, WHITE LIGHT SOURCE, ILLUMINATING DEVICE, AND LIQUID CRYSTAL DISPLAY

[Problems to Be Solved] 1. A red fluorescent material containing an element A , europium (Eu) , silicon (Si) , carbon (C) , oxygen (O) , and nitrogen (N) , at an atomic ratio of the following composition formula (1):{'br': None, 'i': 'A', 'sub': (m-x)', 'x', '(9-y)', 'y', 'n', '[12-2 (n-m)/3 ], '[Eu][SiC]ON'}wherein the element A is an group 2 element including at least calcium (Ca) and strontium (Sr); andm, x, y, and n satisfy 3 Подробнее

Thermoluminescent phosphor and method of producing the same

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.

SURFACE-TREATED FLUORESCENT MATERIAL AND PROCESS FOR PRODUCING SURFACE-TREATED FLUORESCENT MATERIAL

Provided are a surface treated phosphor having high dispersibility and remarkably improved moisture resistance without degradation in fluorescence properties, and a method of producing the surface treated phosphor. 1. A surface treated phosphor comprising:a phosphor matrix including an alkaline earth metal and silicon; anda surface treatment layer including an alkaline earth metal, silicon, and a specific element belonging to groups 4 to 6 of the periodic table,wherein, when element distribution of the surface treatment layer in the thickness direction viewed in cross-section is determined by electron microscopy and energy dispersive X-ray spectroscopy coupled with the electron microscopy, the position representing the maximum peak of a specific element content is located closer to the surface than the position representing the maximum peak of a silicon content and [{'br': None, '[Formula 1]'}, {'br': None, 'sub': 1', '2, 'S Подробнее

Method of manufacturing light-emitting device and apparatus for manufacturing light-emitting device

A method of manufacturing a light-emitting device which includes a light-emitting source by applying, onto the light-emitting source, a fluorescent resin which includes fluorescent particles and is stored in and discharged from an applicator, the method includes: measuring a first concentration which is a concentration of the fluorescent particles included in the fluorescent resin discharged from the applicator; and applying, onto the light-emitting source, the fluorescent resin in an application amount determined based on the first concentration which has been measured and reference data which indicates a relationship between a concentration of the fluorescent particles and an application amount of the fluorescent resin that enables the light-emitting device to have constant chromaticity.

GREEN LIGHT-EMITTING SILICATE PHOSPHOR

A green light-emitting silicate phosphor comprising Eu-activated strontium barium silicate which has a crystal phase of magnesium oxide or a merwinite crystal phase and contains 0.15 to 0.90 mol of magnesium per one mol of silicon gives a light emission stable at elevated temperatures. 1. A green light-emitting silicate phosphor comprising Eu-activated strontium barium silicate which contains a crystal phase of magnesium oxide or a merwinite crystal phase.2. The green light-emitting silicate phosphor of claim 1 , which contains 0.15 to 0.90 mol of magnesium per one mol of silicon.3. The green light-emitting silicate phosphor of claim 1 , which contains both of a crystal phase of magnesium oxide and a merwinite crystal phase.4. The green light-emitting silicate phosphor of claim 1 , which has the crystal phase of magnesium oxide and gives an X-ray diffraction pattern given by utilizing CuKa ray of an angle 0 of incidence in which a relative strength of a diffraction peak attributed to the crystal phase of magnesium oxide in the region of 42.8° to 43.1° in terms of 20 is in the range of 0.02 to 0.20 per 1 of a strength of diffraction peak attributed to crystal phase of the strontium barium silicate in the region of 31.3° to 31.6° in terms of 20.5. The green light-emitting silicate phosphor of claim 1 , which has the merwinite crystal phase and gives an x-ray diffraction pattern given by utilizing CuKa ray of an angle 0 of incidence in which a relative strength of a diffraction peak attributed to the merwinite crystal phase in the region of 32.4° to 32.7° in terms of 20 is in the range of 0.02 to 0.50 per 1 of a strength of diffraction peak attributed to crystal phase of the strontium barium silicate in the region of 31.3° to 31.6° in terms of 28.6. The green light-emitting silicate phosphor of claim 2 , which is produced by calcining a powdery mixture comprising a powdery strontium compound claim 2 , a powdery barium compound claim 2 , a powdery silicon compound and a ...

ENCAPSULATING SHEET, PRODUCING METHOD OF OPTICAL SEMICONDUCTOR DEVICE, OPTICAL SEMICONDUCTOR DEVICE, AND LIGHTING DEVICE

An encapsulating sheet, encapsulating an optical semiconductor element, includes a first layer which contains a phosphor and a second layer which contains a phosphor, is laminated on the first layer, and encapsulates the optical semiconductor element. The ratio of the volume of the phosphor in the first layer to that of the phosphor in the second layer is 90:10 to 55:45. 1. An encapsulating sheet , encapsulating an optical semiconductor element , comprising:a first layer which contains a phosphor anda second layer which contains a phosphor, is laminated on the first layer, and encapsulates the optical semiconductor element, whereinthe ratio of the volume of the phosphor in the first layer to that of the phosphor in the second layer is 90:10 to 55:45.2. The encapsulating sheet according to claim 1 , whereinthe first layer and the second layer contain a silicone resin.3. The encapsulating sheet according to claim 1 , wherein{'sub': 2', '4, 'the phosphor contained in the first layer and the phosphor contained in the second layer are (Sr, Ba)SiO:Eu.'}4. The encapsulating sheet according to claim 1 , whereinthe total amount of the phosphor contained in the first layer and the phosphor contained in the second layer is adjusted to be 0.32 to 0.37 of CIE-y in a total luminous flux measurement when the optical semiconductor element which is encapsulated is allowed to emit light.5. A method for producing an optical semiconductor device comprising the steps of:preparing an encapsulating sheet comprises:a first layer which contains a phosphor anda second layer which contains a phosphor, is laminated on the first layer, and encapsulates the optical semiconductor element, andthe ratio of the volume of the phosphor in the first layer to that of the phosphor in the second layer is 90:10 to 55:45,allowing the encapsulating sheet to be opposed to the optical semiconductor element so that the second layer faces the optical semiconductor element, andpressing at least one of the ...

METHOD FOR PREPARING A ß-SIAION PHOSPHOR

There is provided a method for preparing a β-SiAlON phosphor capable of be controlled to show characteristics such as high brightness and desired particle size distribution. The method for preparing a β-SiAlON phosphor represented by Formula: Si (6-x) Al x O y N (8-y) :Ln z (wherein, Ln is a rare earth element, and the following requirements are satisfied: 0<x≦4.2, 0<y≦4.2, and 0<z≦1.0) includes: mixing starting materials to prepare a raw material mixture; and heating the raw material mixture in a nitrogen-containing atmospheric gas, wherein the starting materials includes a host raw material including a silicon raw material including metallic silicon, and at least one aluminum raw material selected from the group consisting of metallic aluminum and aluminum compound, and at least activator raw material selected from the rare earth elements for activating the host raw material.

Red and Green Fluorosulfide phosphor, Preparation Method and White-Light Emitting Diodes Thereof

Novel red and green fluorosulfide phosphors have a chemical formula of (A 1-x-y Ce x B y )SF, wherein A and B are both trivalent metal ions, 0<x≦0.1, and 0≦y≦1. A is a rare earth metal, B is a rare earth metal or a group 13 metal. A preparation method of the fluorosulfide and white-light emitting diode application thereof are also disclosed.

LUMINESCENT MATERIAL AND A PROCESS OF FORMING THE SAME

A luminescent material can be formed by a process using a vacancy-filling agent that includes vacancy-filling atoms. In an embodiment, the process can include forming a mixture of a constituent corresponding to the luminescent material and the vacancy-filling agent. The process can further include forming the luminescent material from the mixture, wherein the luminescent material includes at least some of the vacancy-filling atoms from the vacancy-filling agent. In another embodiment, the process can include melting a constituent corresponding to the luminescent material to form a melt and adding a vacancy-filling agent into the melt. The process can also include forming the luminescent material from the melt, wherein the luminescent material includes at least some of the vacancy-filling atoms from the vacancy-filling agent. The luminescent material may have one or more improved performance properties as compared to a corresponding base material of the luminescent material. 1. A process comprising: a constituent corresponding to a luminescent material; and', 'a vacancy-filling agent that includes vacancy-filling atoms; and, 'forming a mixture offorming the luminescent material from the mixture, wherein the luminescent material includes at least some of the vacancy-filling atoms from the vacancy-filling agent.2. A process comprising:melting a constituent corresponding to a luminescent material to form a melt;adding a vacancy-filling agent into the melt; andforming the luminescent material from the melt, wherein the luminescent material includes at least some of the vacancy-filling atoms from the vacancy-filling agent.3. The process of claim 1 , wherein the vacancy-filling agent further comprises other atoms that include an element different from an element of the vacancy-filling atoms claim 1 , and forming the luminescent material is performed such that substantially none of the other atoms from the vacancy-filling agent is incorporated into a matrix of the ...

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

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 ...

LIGHT-EMITTING DIES INCORPORATING WAVELENGTH-CONVERSION MATERIALS AND RELATED METHODS

In accordance with certain embodiments, semiconductor dies are embedded within polymeric binder to form, e.g., freestanding white light-emitting dies and/or composite wafers containing multiple light-emitting dies embedded in a single volume of binder. 1148.-. (canceled)149. A composite wafer comprising:a solid volume of a polymeric binder having a first surface and a second surface opposite the first surface;suspended within the binder, a plurality of semiconductor dies each having a first face, a second face opposite the first face, and at least one sidewall spanning the first and second faces; anddisposed on the first face of each semiconductor die, at least two spaced-apart contacts each having a free terminal end (i) not covered by the binder and (ii) available for electrical connection.150. The composite wafer of claim 149 , wherein at least portions of the contacts of the semiconductor dies protrude from the binder.151. The composite wafer of claim 149 , wherein at least a portion of each said sidewall of each of the semiconductor dies protrudes from the first surface of the binder.152. The composite wafer of claim 149 , wherein the binder comprises at least one of silicone or epoxy.153. The composite wafer of claim 149 , wherein the binder contains a wavelength-conversion material therein.154. The composite wafer of claim 153 , wherein the wavelength material comprises at least one of a phosphor or quantum dots.155. The composite wafer of claim 149 , wherein each semiconductor die comprises a light-emitting element.156. The composite wafer of claim 155 , wherein the binder is transparent to a wavelength of light emitted by the semiconductor dies.157. The composite wafer of claim 155 , wherein each semiconductor die comprises a bare-die light-emitting diode.158. The composite wafer of claim 155 , wherein each semiconductor die comprises a semiconductor material comprising at least one of GaAs claim 155 , AlAs claim 155 , InAs claim 155 , GaP claim 155 , AlP ...

MN-ACTIVATED PHOSPHORS

The invention relates to compounds of the general formula (I): LuAAlScO:MnCa, where A stands for Y, Gd or Tb, x stands for a value from the range from 0 to 2.90, y stands for a value from the range from 0 to 0.50, z stands for a value from the range from 0.005 to 0.05, and to a process for the preparation of these phosphors and to the use thereof as conversion phosphors or in lamps. 1. Compound of the formula I{'br': None, 'sub': 3-x-z', 'x', '5-y-z', 'y', '12', 'z', 'z, 'LuAAlScCO:MnCa\u2003\u2003(I)'}whereA stands for Y, Gd or Tbx stands for a value from the range from 0 to 2.90y stands for a value from the range from 0 to 0.50z stands for a value from the range from 0.005 to 0.05.2. Compound according to claim 1 , characterised in that x stands for a value from the range from 0 to 2.0 claim 1 , preferably from the range from 0.10 to 0.90.3. Compound according to claim 1 , characterised in that y stands for a value from the range from 0.10 to 0.45 claim 1 , preferably from the range from 0.20 to 0.40.4. Process for the preparation of a compound according to comprising the following process steps:a) mixing of lutetium-, scandium-, calcium-, aluminium-, manganese-, yttrium-, terbium- and/or gadolinium-containing materials,b) addition of at least one further inorganic and/or organic substance,c) thermal treatment of the mixture.5. Process according to claim 4 , characterised in that the inorganic or organic substances (process step b) are selected from the group of the ammonium halides claim 4 , alkaline-earth metal fluorides claim 4 , such as calcium fluoride claim 4 , strontium fluoride or barium fluoride claim 4 , alkaline-earth or alkali-metal borates claim 4 , boric acid claim 4 , alkaline-earth or alkali-metal carbonates or ammonium hydrogencarbonate claim 4 , citric acid claim 4 , alcoholates claim 4 , as well as oxalates and/or silicates claim 4 , such as claim 4 , for example claim 4 , TEOS.6. Process according to claim 4 , characterised in that the thermal ...

BLUE-LIGHT-EMITTING PHOSPHOR AND LIGHT-EMITTING DEVICE EQUIPPED WITH THE BLUE-LIGHT-EMITTING PHOSPHOR

A blue light-emitting phosphor having an elemental formula of SrMgSiO:Eu(wherein x represents a value in the range of 0.008 to 0.110), a merwinite crystal structure and a crystal lattice strain of 0.080% or less as determined from an X-ray diffraction pattern at diffraction angle 2θ of 20-130° by the Le Bail method, wherein the X-ray diffraction pattern is determined using a CuKα ray having an incident angle of θ, is used advantageously as a blue light-emitting material for a light-emitting device which comprises a semiconductor light-emitting element capable of emitting a light having a wavelength of 350-430 nm upon application of an electrical current, such as a white light-emitting LED lamp, and a blue light-emitting material capable of emitting a blue light upon excitation with a light emitted by the semiconductor light-emitting element. 1. A blue light-emitting phosphor for the use as a blue light-emitting material to be placed in a light-emitting device which comprises a semiconductor element emitting a light in the wavelength region of 350 to 430 nm by applying electric energy and a blue light-emitting material emitting a blue light when excited with the light emitted by the semiconductor element , which has an elemental formula of SrMgSiO:Euin which x is a value in the range of 0.008 to 0.110 , a merwinite crystal structure , and a crystal lattice strain of 0.080% or less , the crystal lattice strain being determined from an X-ray diffraction pattern in the region of 20 to 130° in terms of a diffraction angle 2θ by the Le Bail method , the X-ray diffraction pattern being obtained using CuKα ray having an incident angle of θ.2. The blue light-emitting phosphor of claim 1 , in which the crystal lattice strain is in the range of 0.025 to 0.080%.3. A light-emitting device comprising a semiconductor element emitting a light in the wavelength region of 350 to 430 nm by applying electric energy and a blue light-emitting material emitting a blue light when excited ...

Luminescent material and light emitting device comprising such luminescent material

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.

Novel Long Decay Phosphors

The present invention relates to long decay phosphors comprising rare earth activated strontium aluminates and methods for producing them. The phosphors comprise a matrix of the formula SrAlOcomprising europium as an activator and a further rare earth element as a co-activator, wherein the molar ratio of Al/Sr in the starting materials is in the range of 3.1 to less than 3.5 and the ratio of Eu/Sr is in the range of 0.0015 to 0.01. The process for the preparation of a phosphor comprises the steps of milling the starting materials for the synthesis of the phosphor, the starting materials comprising a boron compound selected from boric acid, boric oxide or a borate salt in an amount such that the B/Sr molar ratio is between 0.1 and to 0.3, treating the milled composition with heat, grinding the block material which is obtained through the heat treatment, ball-milling the crushed material, sieving the material, and washing the material with an aqueous solution. 115-. (canceled)16. A phosphor comprising:{'sub': 4', '14', '25, '(a) a matrix of the formula SrAlO, made from starting materials,'}(b) boron,(c) europium as an activator, and wherein the molar ratio of Al/Sr in the starting materials is in the range of 3.1 to less than 3.5 and', 'the ratio of Eu/Sr is in the range of 0.0015 to 0.01., '(d) a further rare earth element as a co-activator,'}17. The phosphor according to claim 16 , wherein the further rare earth element is dysprosium.18. The phosphor according to claim 17 , wherein the amount of dysprosium is such that the molar ratio Dy/Sr in the starting materials is in the range of 0.005 to 0.02.19. The phosphor according to claim 16 , wherein the amount of boron is such that the ratio B/Sr in the starting materials is in the range of 0.1 to 0.3.20. The phosphor according to claim 16 , whereinthe range of the molar ratio of Al/Sr is 3.1 to 3.45,the range of the molar ratio of Eu/Sr is 0.0015 to 0.01,the range of the molar ratio of B/Sr is 0.1 to 0.3 andthe range ...

Solid state white light emitter and display using same

A light emitting assembly comprising a solid state device coupleable with a power supply constructed and arranged to power the solid state device to emit from the solid state device a first, relatively shorter wavelength radiation, and a down-converting luminophoric medium arranged in receiving relationship to said first, relatively shorter wavelength radiation, and which in exposure to said first, relatively shorter wavelength radiation, is excited to responsively emit second, relatively longer wavelength radiation. In a specific embodiment, monochromatic blue or UV light output from a light-emitting diode is down-converted to white light by packaging the diode with fluorescent organic and/or inorganic fluorescers and phosphors in a polymeric matrix.

LIGHT-EMITTING DEVICE

There is realized a light-emitting device that emits, with high efficiency, white light with excellent color rendering index in a lamp color region. A light-emitting device () of the present invention is a light-emitting device () for emitting white light in a lamp color region, including at least a light-emitting element () for emitting blue light, an orange fluorescent material () which absorbs the blue light so as to emit orange light, and a red fluorescent material () which absorbs the blue light so as to emit red light, the orange fluorescent material () being a Ce-activated CaAlSiNfluorescent material in a solid solution crystal form in which Ce and oxygen are dissolved in a crystal having a composition of cCaAlSiN.(1−c)LiSiNwhere 0.2≦c≦0.8. 1. A light-emitting device for emitting white light in a lamp color region , comprising at least a light-emitting element for emitting blue light , an orange fluorescent material which absorbs the blue light so as to emit orange light , and a red fluorescent material which absorbs the blue light so as to emit red light , the orange fluorescent material being a Ce-activated CaAlSiNfluorescent material in a solid solution crystal form in which Ce and oxygen are dissolved in a crystal having a composition of cCaAlSiN.(1−c)LiSiNwhere 0.2≦c≦0.8.2. The light-emitting device as set forth in claim 1 , wherein a weight ratio of the red fluorescent material to a fluorescent material other than the red fluorescent material is less than 0.2.3. The light-emitting device as set forth in claim 1 , wherein full width at half maximum of emission spectrum of the orange fluorescent material is not less than 130 nm.4. The light-emitting device as set forth in claim 1 , wherein the orange fluorescent material contains Li in a range of not less than 1.4 weight % and not more than 4 weight %.5. The light-emitting device as set forth in claim 1 , wherein the red fluorescent material is an Eu-activated nitride fluorescent material or an oxynitride ...

Carbidonitride phosphors and LED lighting devices using the same

A red phosphor is provided. Also provided is a lighting apparatus containing a red phosphor.

White-Light LED Red Phosphor and Method of Manufacturing the Same

A white-light LED red phosphor and method of manufacturing the same are provided. The luminescent materials are represented by the general formula: Ca 1-y-m-e-r Y y M m X x-p P p Z z N n :Eu e , R f , wherein M is at least one selected from Sr, Ba, Sc, Li, Na and K; X is at least one selected from B, Al and Ga, and Al must be contained; Z is at least one selected from Si, V and Nb, and Si must be contained; R is at least one selected from Dy, Er, Tm and Lu, and Dy must be contained; 0.001≦y≦0.2, 0.001≦m≦0.2, 0.5≦x,z≦1.5, 0.001≦p≦0.1, 2≦n≦4, 0.001≦e≦0.2 and 0.001≦r≦0.1. The phosphor according to the present invention has features such as good chemical stability, high luminous efficiency, and good anti-luminous attenuation performance, etc.

Light-emitting device

Disclosed is a light-emitting device ( 1 ) including a light-emitting element ( 2 ) emitting primary light, and a light converter ( 3 ) absorbing a part of the primary light emitted from the light-emitting element ( 2 ) and emitting secondary light having a longer wavelength than the primary light. The light converter ( 3 ) contains a green light-emitting phosphor ( 4 ) and a red light-emitting phosphor ( 5 ). The green light-emitting phosphor ( 4 ) is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: Eu a Si b Al c O d N e and a divalent europium-activated silicate phosphor substantially represented by the following formula: 2(Ba 1-f-g MI f Eu g )O.SiO 2 , while the red light-emitting phosphor ( 5 ) is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII 2 (MIII 1-h Mn h )F 6 and/or MIV(MIII 1-h Mn h )F 6 . Consequently, the light-emitting device ( 1 ) has excellent color gamut (NTSC ratio).

HALO-SILICATE LUMINESCENT MATERIALS AND PREPARATION METHODS THEREOF

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

LIGHT EMITTING DIODE COMPONENT COMPRISING POLYSILAZANE BONDING LAYER

In one embodiment, a semiconductor component, such as a wavelength converter wafer, is described wherein the wavelength converter is bonded to an adjacent inorganic component with a cured bonding layer comprising polysilazane polymer. The wavelength converter may be a multilayer semiconductor wavelength converter or an inorganic matrix comprising embedded phosphor particles. In another embodiment, the semiconductor component is a pump LED component bonded to an adjacent component with a cured bonding layer comprising polysilazane polymer. The adjacent component may the described wavelength converter(s) or another component comprised of inorganic material(s) such as a lens or a prism. Also described are methods of making semiconductor components such as wavelength converters and LED's. 1. A semiconductor component comprising a wavelength converter bonded to an adjacent inorganic component with a cured bonding layer comprising a polysilazane polymer.2. The semiconductor component of wherein the wavelength converter is a multilayer semiconductor wavelength converter or an inorganic matrix comprising embedded phosphor particles.3. The semiconductor component of wherein the wavelength converter is a multilayer semiconductor wavelength converter comprising II-VI semiconductor material.4. The semiconductor component of wherein the multilayer semiconductor wavelength converter absorbs a portion of blue light to produce longer wavelengths.5. The semiconductor component of wherein the bonding layer further comprises up to 10 wt-% of free-radically polymerizable monomer.6. The semiconductor component of wherein the free-radically polymerizable monomer is a (meth)acrylate monomer.7. The semiconductor component of wherein the (meth)acrylate monomer is a multi-(meth)acrylate monomer comprising at least three (meth)acrylate groups.8. The semiconductor component of wherein the adjacent component is a cover sheet.9. A light emitting diode (LED) claim 1 , comprising:a pump LED ...

Luminescent material

According to one embodiment, the luminescent material emits light having an luminescence peak within a wavelength range of 550 to 590 nm when excited with light having an emission peak in a wavelength range of 250 to 520 nm. The luminescent material has a composition represented by the following formula 1. (Sr 1-x Eu x ) a Si b AlO c N d   formula 1 wherein x, a, b, c and d satisfy following condition: 0<x≦0.16, 0.50≦a≦0.70, 2.0≦b≦2.5 0.45≦c≦1.2, 3.5≦d≦4.5, and 3.6≦d/c≦8.0.

Doped sapphire as substrate and light converter for light emitting diode

Described is a material composition comprising a crystalline sapphire material doped with two or more dopants, wherein when a primary radiation comprising blue light is propagated through the crystalline material at least a portion of the primary radiation is converted into a first secondary radiation and a second secondary radiation that is emitted from the crystalline material, wherein the first secondary radiation comprises green light and the second secondary radiation comprises red light, and wherein the primary radiation, first secondary radiation and second secondary radiation when combined produce white light. Also described are LED devices employing the material composition as a light transmissive substrate.

LUMINESCENT MATERIAL

According to one embodiment, the luminescent material shows a luminescence peak in a wavelength range of 570 to 670 nm when excited with light having an emission peak in a wavelength range of 250 to 520 nm. The luminescent material includes a host material having a crystal structure substantially same as the crystal structure of SrSiAlON. The host material is activated by Eu, and includes Sr and Ca to satisfy a relationship of 0.008≦M/(M+M)≦0.114, where Mis a number of moles of Ca and Mis a number of moles of Sr. 1. A luminescent material which exhibits a luminescence peak in a wavelength range of 570 to 670 nm when excited with light having an emission peak in a wavelength range of 250 to 520 nm , the luminescent material comprising a host material having a crystal structure substantially same as the crystal structure of SrSiAlON , the host material being activated by Eu , and the host material comprising Sr and Ca to satisfy a relationship of 0.008≦M/(M+M)≦0.114 , where Mis a number of moles of Ca and Mis a number of moles of Sr.2. The luminescent material according to claim 1 , wherein the X-ray diffraction pattern of the luminescent material has peaks at any ten diffraction angles (2θ) of 15.1±0.1° claim 1 , 23.0±0.1° claim 1 , 24.9±0.15° claim 1 , 25.7±0.2° claim 1 , 26.0±0.15° claim 1 , 29.4±0.1° claim 1 , 31.0±0.1° claim 1 , 31.7±0.15° claim 1 , 33.1±0.15° claim 1 , 33.6±0.15° claim 1 , 34.0±0.15° claim 1 , 34.4±0.2° claim 1 , 35.2±0.25° claim 1 , 36.1±0.1° claim 1 , 36.6±0.15° claim 1 , 37.3±0.2° claim 1 , 40.6±0.2° and 56.6±0.25°.3. The luminescent material according to claim 1 , wherein the luminescent material has a composition represented by the compositional formula 1:{'br': None, 'sub': 1-p', 'p', '1-x', 'x', 'A', 'B', 'C', 'D, '[(SrCa)Eu]SiAlON\u2003\u2003compositional formula 1'}wherein p, x, A, B, C and D satisfy following conditions:0.008≦p≦0.114, 0≦x≦0.4, 0.55≦A≦0.8,2≦B≦3, 0 Подробнее

Nitride-Based Red-Emitting Phosphors in RGB (Red-Green-Blue) Lighting Systems

Embodiments of the present invention are directed to nitride-based, red-emitting phosphors in red, green, and blue (RGB) lighting systems, which in turn may be used in backlighting displays and warm white-light applications. In particular embodiments, the red-emitting phosphor is based on CaAlSiNtype compounds activated with divalent europium. In one embodiment, the nitride-based, red emitting compound contains a solid solution of calcium and strontium compounds (Ca,Sr)AlSiN:Eu, wherein the impurity oxygen content is less than about 2 percent by weight. In another embodiment, the (Ca,Sr)AlSiN:Eucompounds further contains a halogen in an amount ranging from about zero to about 2 atomic percent, where the halogen may be fluorine (F), chlorine (Cl), or any combination thereof. In one embodiment at least half of the halogen is distributed on 2-fold coordinated nitrogen (N2) sites relative to 3-fold coordinated nitrogen (N3) sites. 1. A nitride-based , red emitting compound of the type (Ca ,Sr)AlSiN:Eu , wherein the impurity oxygen content is less than about 2 percent by weight.2. A nitride-based , red emitting compound of the type (Ca ,Sr)AlSiN:Eu , further comprising a halogen whose content ranges from greater than about zero to about 2 atomic percent.3. The compound of claim 2 , wherein the halogen is selected from the group consisting of F and Cl.4. The compound of claim 2 , wherein at least half of the halogen is distributed on 2-fold coordinated nitrogen (N2) sites relative to 3-fold coordinated nitrogen (N3) sites.5. An RGB lighting system for use in a white LED or backlighting display application claim 2 , the RGB lighting system comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the nitride-based, red-emitting phosphor according to ,'}a green phosphor, anda blue LED emitting in a wavelength ranging from about 400 nm to about 550 nm.6. An RGB lighting system for use in a white LED or backlighting display application claim 2 , the RGB lighting system ...

PHOSPHOR AND PRODUCTION METHOD THEREOF, PHOSPHOR-CONTAINING COMPOSITION, LIGHT EMITTING DEVICE, ILLUMINATING DEVICE, DISPLAY, AND NITROGEN-CONTAINING COMPOUND

To provide a new phosphor of which fluorescence contains much red light component and has a large full width at half maximum, the crystal phase represented by the formula [I] is included in the phosphor. 1. A phosphor comprising a crystal phase represented by formula [I] ,{'br': None, 'sub': 3−x−y−z+w2', 'z', '1.5x+y−w2', '6−w1−w2', 'W1+w2', 'y+w1', '11−y−w1, 'RMASiAlON\u2003\u2003[I]'}wherein,R represents at least one kind of a rare-earth element selected from the group consisting of La, Gd, Lu, Y and Sc,M represents at least one kind of a metal element selected from the group consisting of Ce, Eu, Mn, Yb, Pr and Tb,A represents at least one kind of a bivalent metal element selected from the group consisting of Ba, Sr, Ca, Mg and Zn, and [{'br': None, 'i': '−x−y−z+w', '(1/7)≦(32)/6<(1/2),'}, {'br': None, 'i': 'x+y−w', '0≦(1.52)/6<(9/2),'}, {'br': None, 'i': 'x=', '0'}, {'br': None, 'i': '≦y<', '02,'}, {'br': None, 'i': ' Подробнее

Red-Emitting Nitride-Based Phosphors

A red-emitting phosphor comprises a nitride-based composition represented by the chemical formula MM′SiAlN:RE, wherein: M is at least one monovalent, divalent or trivalent metal with valence v; M′ is at least one of Mg, Ca, Sr, Ba, and Zn; and RE is at least one of Eu, Ce, Tb, Pr, and Mn; wherein x satisfies 0.1≦x<0.4, and wherein the phosphor has the general crystalline structure M′SiN:RE, Al substitutes for Si within the crystalline structure, and M is located substantially at interstitial sites. Furthermore, the phosphor is configured such that 1,000 hours of aging at 85° C. and 85% humidity results in a deviation in chromaticity coordinates CIE Δx and Δy of less than about 0.03. Furthermore, the phosphor absorbs radiation in the UV and blue and emits light with a photoluminescence peak wavelength within the range from about 620 to 650 nm. 1. A red-emitting phosphor with a nitride-based composition comprising:an element M, wherein M is at least one of Li, Na, K, Sc, Ca, Mg, Sr, Ba and Y;an element M′, wherein M′ is at least one of Mg, Ca, Sr, Ba, and Zn;silicon;aluminum;nitrogen; andan element RE, wherein RE is at least one of Eu, Ce, Tb, Pr and Mn;{'sub': 2', '5', '8, 'wherein said red-emitting phosphor has the general crystalline structure of M′SiN:RE with M and Al incorporated therein, and wherein said red-emitting phosphor is configured such that the change in chromaticity coordinates CIE Δx and CIE Δy after 1,000 hours of aging at about 85° C. and about 85% relative humidity is less than or equal to about 0.03 for each coordinate.'}2. The red-emitting phosphor of claim 1 , wherein M is Ca.3. The red-emitting phosphor of claim 1 , wherein M′ is Sr.4. The red-emitting phosphor of claim 1 , wherein said red-emitting phosphor consists of Ca claim 1 , Sr claim 1 , Si claim 1 , Al claim 1 , N and Eu.5. The red-emitting phosphor of claim 1 , wherein M is located within said general crystalline structure substantially at the interstitial sites and Al substitutes for ...

White light emitting device

A white light emitting device of an embodiment includes: a light emitting element having a peak wavelength in a wavelength range from 430 to 470 nm both inclusive, a first fluorescent material formed over the light emitting element, and emitting light having a first peak wavelength of 530 to 580 nm both inclusive and having a first half width, and a second fluorescent material formed over the light emitting element, and emitting light having a second peak wavelength that is longer than the first peak wavelength and ranges from 570 to 620 nm both inclusive, and having a second half width that is 100 nm or less and is equal to or narrower than the first half width.

Luminescent material

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.

Phosphors and method for producing thereof

The present embodiments provide a europium-activated oxynitride phosphor and a production method thereof. This phosphor emits red luminescence having a peak at 630 nm or longer and can be produced by use of inexpensive oxides as raw materials containing alkaline earth metals such as strontium. The oxynitride phosphor is activated by a divalent europium and represented by the formula (1): (M 1-x Eu x )Al a Si b O c N d C e   (1). In the formula, M is an alkaline earth metal, and x, a, b, c, d and e are numbers satisfying the conditions of 0<x<0.2, 1.3≦a≦1.8, 3.5≦b≦4, 0.1≦c≦0.3, 6.7≦d≦7.2 and 0.01≦3≦0.1, respectively.