Phosphors, fabricating method thereof, and light emitting devices employing the same
AssigneeIndustrial Technology Research Institute
InventorsShian-Jy Wang, Shyue-Ming Jang, Yi-Chen Chiu, Wei-Jen Liu, Teng-Ming Chen, Chien-Hao Huang, Yao-Tsung Yeh
Life of this patent
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Abstract
The invention provides a phosphor emitting UV and visible light, which may be collocated with other phosphors to provide a white light illumination device, composed of (M1-xREx)9M′(PO4)7 or M9(M′1-yRE′y)(PO4)7 , wherein M is Mg, Ca, Sr, Ba, Zn or combinations thereof, M′ is Sc, Y, La, Gd, Al, Ga, In or combinations thereof, RE is Pr, Nd, Eu, Gd, Tb, Ce, Dy, Yb, Er, Sc, Mn, Zn or combinations thereof, RE′ is Pr, Nd, Gd, Tb, Ce, Dy, Yb, Er, Bi or combinations thereof, 0.001≦x≦0.8, and 0.001≦y<1.0.
Claims26
A phosphor, having a formula:
- (M1-xREx)9M′(PO4)7 or M9(M′1-yRE′y)(PO4)7
- wherein, M is Mg, Ca, Sr, Ba, Zn, or combinations thereof, M′ is Sc, Y, La, Gd, Al, Ga, In, or combinations thereof, RE is Pr, Nd, Eu, Gd, Tb, Ce, Dy, Yb, Er, Sc, Mn, Zn, or combinations thereof, RE′ is Pr, Nd, Gd, Tb, Ce, Dy, Yb, Er, Bi, or combinations thereof, 0.001≦x≦0.8, and 0.001≦y≦1.0.
A method for fabricating a phosphor, having a formula:
- (M1-xREx)9M′(PO4)7 or M9(M′1-yRE′y)(PO4)7
- wherein, M is Mg, Ca, Sr, Ba, Zn, or combinations thereof, M′ is Sc, Y, La, Gd, Al, Ga, In, or combinations thereof, RE is Pr, Nd, Eu, Gd, Tb, Ce, Dy, Yb, Er, Sc, Mn, Zn, or combinations thereof or combinations thereof, RE′ is Pr, Nd, Gd, Tb, Ce, Dy, Yb, Er, Bi, or combinations thereof, 0.001≦x≦0.8, and 0.001≦y≦1.0,
- comprising:
- mixing a mixture which comprises the following components:
- (1) M-containing oxide;
- (2) M′-containing oxide;
- (3) (NH4)2HPO4 or (NH4)H2PO4;
- and (4) RE-containing or RE′-containing oxide;
- and
- sintering the mixture.
Dependencies are inferred from the claim text.