Oxynitride fluorescent material and light-emitting device

Details Oxynitride fluorescent material and light-emitting device Oxynitride fluorescent material and light-emitting device

2011-08-30

2011-08-30

Koslow, Carol M (Department: 1734)

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

C257S098000, C313S503000, C313S486000, C313S582000, C313S583000, C313S487000, C313S468000

Reexamination Certificate

active

08007684

ABSTRACT:
The invention has for its object the provision of an oxynitride fluorescent material has higher emission luminance than conventional rare earth element-activated sialon fluorescent materials.To this end, an oxynitride fluorescent material is designed in such a way as comprising a JEM phase as a mother crystal and a luminescence center element M1. For instance, the luminescence center element M1is at least one kind of an element selected from Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu. And the JEM phase is expressed as a general formula MA1(Si6-zAlz) N10-zOz(where M indicates a metal element, 0.1≦z≦3).

REFERENCES:
patent: 7229573 (2007-06-01), Setlur et al.
patent: 7494606 (2009-02-01), Takahashi et al.
patent: 7611642 (2009-11-01), Takahashi et al.
patent: 2003/0094893 (2003-05-01), Ellens et al.
patent: 2003/0168643 (2003-09-01), Mitomo et al.

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