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US 8,105,502 B2Granted
Luminescent material
AssigneeKabushiki Kaisha Toshiba
InventorsYumi Fukuda, Jun-ichi Tatami, Hironori Asai, Katsutoshi Komeya, Naotoshi Matsuda, Toru Wakihara, Keiko Albessard, Shoko Abe
Life of this patent
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Abstract
A luminescent material is provided, which includes a carbide oxynitride-based compound having a composition represented by formula 1: (M1−wRw)uAl1−xSi1+vOzNtCy formula 1 wherein M is at least one metal element excluding Si and Al, and R is a luminescent central element. w, u, x, v, z, t and y satisfy following relationships: 0.001<w<0.5; 0.66≦u≦1; 0.07≦x≦0.73; 0.06≦v≦0.84; 0.04≦z≦0.44; 2.7≦t≦3.1; and 0.019≦y≦0.13.
Claims15
A luminescent material comprising:
- a carbide oxynitride-based compound having a composition represented by formula 1:
- (M1−wRw)uAl1−xSi1+vOzNtCy formula 1
- wherein M is at least one metal element excluding Si and Al, R is a luminescent central element, w, u, x, v, z, t and y satisfy following relationships:
- 0.001<w<0.5;
- 0.66≦u≦1;
- 0.07×0.73;
- 0.06≦v≦0.84;
- 0.04≦z≦0.44;
- 2.7≦t≦3.1;
- and
- 0.019≦y≦0.13.
8 more elements
Dependencies are inferred from the claim text.