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US 9,525,110 B2Granted
Phosphor, light emitting device and lighting apparatus
AssigneeDenka Company Limited
InventorsKeita Kobayashi, Yasuhito Fushii
Life of this patent
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Abstract
An object of the invention is to provide a phosphor that emits a light containing much red and green light components and a light-emitting device and a lighting apparatus comprising the phosphor that have favorable color rendering properties. An oxide nitride phosphor having a garnet structure represented by Formula [1]: AwAlxCy:Cez, in Formula [1], A=(Lua,Yb), a+b=1, 0<a<1, 0<b<1, C═(Oc,Nd), 10≦c+d≦16, 1.4≦c/d, 2≦w+z≦4, 4.0<x≦7.0); the molar ratio of Ce/A is ≧0.015 and the nitrogen content is 0.007 mass % or more.
Claims3
A phosphor having a garnet structure represented by General Formula:
- (Lua,Yb)wAlx(Oc,Nd)y:Cez, wherein
- a+b=1, 0<a<1, 0<b<1, 10≦(c+d)×y≦16, 1.4≦c/d, 2≦w+z≦4, and 4.0<x≦7.0;
- the molar ratio of Ce and (sum of Lu+Y) is 0.015≦Ce/(Lu+Y) and
- the nitrogen content is 0.007 mass % or more.
1 more element
Dependencies are inferred from the claim text.