23-01-2014 дата публикации
Номер: US20140021855A1
Принадлежит:
A phosphor and a light emitting device including the phosphor may be provided that emits light having a peak wavelength between a green wavelength band and a yellow wavelength band, has a crystal structure of which the chemical formula is MSiNO, M=CaSrEu(x+y+z=1), and has a triclinic system crystal structure in which, when molar ratios of Ca, Sr and Eu are x, y and z respectively, x+y+z=1 and when the x, y and z are represented by a triangular projection, the x, y and z are distributed on the lines and at the inside of an area formed by connecting five points of (0.45, 0.55, 0), (0.75, 0.25, 0), (0.75, 0, 0.25), (0.5, 0, 0.5) and (0.45, 0.05, 0.5) by a solid line on a triangular diagram. 1. A phosphor which emits light having a peak wavelength between a green wavelength band and a yellow wavelength band , has a crystal structure of which the chemical formula is MSiNO , M=CaSrEu(x+y+z=1) , and has a triclinic system crystal structure in which , when molar ratios of Ca , Sr and Eu are x , y and z respectively , x+y+z=1 and when the x , y and z are represented by a triangular projection , the x , y and z are distributed on the lines and at the inside of an area formed by connecting five points of (0.45 , 0.55 , 0) , (0.75 , 0.25 , 0) , (0.75 , 0 , 0.25) , (0.5 , 0 , 0.5) and (0.45 , 0.05 , 0.5) by a solid line on a triangular diagram.2. The phosphor of claim 1 , wherein claim 1 , when x claim 1 , i.e. claim 1 , the molar ratio of Ca claim 1 , y claim 1 , i.e. claim 1 , the molar ratio of Sr and z claim 1 , i.e. claim 1 , the molar ratio of Eu are represented on a triangular diagram (x claim 1 , y claim 1 , z) claim 1 , the x claim 1 , y and z are located on the lines and at the inside of an area formed by connecting points of A (0.45 claim 1 , 0.55 claim 1 , 0) claim 1 , B (0.75 claim 1 , 0.25 claim 1 , 0) claim 1 , C (0.7 claim 1 , 0 claim 1 , 0.3) and D (0.5 claim 1 , 0 claim 1 , 0.5) as vertices.3. The phosphor of claim 1 , wherein claim 1 , when x claim 1 , i.e. ...
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