Phosphor, light emitting device using the same and method of manufacturing the phosphor
AssigneeNichia Corporation
InventorsShoji Hosokawa, Masatoshi Kameshima
Life of this patent
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Abstract
Provided are a phosphor which is capable of emitting green light of high luminance and in which unfavorable effects on other members has been reduced so as to be applicable to white light having excellent light emitting characteristics, a light emitting device using the phosphor, and a method for manufacturing the phosphor. The phosphor containing silicon, magnesium, and chlorine, and activated with europium and capable of emitting green light, in which the molar ratio of chlorine to magnesium is in a range of 1.0≦Cl/Mg≦1.9. Introduction of chlorine at such a composition ratio improves the light emitting characteristics and the amount of chlorine dissolved.
Claims11
1-14. (canceled)
A phosphor activated with europium and capable of absorbing near-ultraviolet light to blue light and emitting green light,
- wherein a substantial composition of the phosphor is represented by a general formula shown below in which x, y, z, a, and b are in the ranges as shown below:
- MxEuyMgSizOaXb
- wherein M is at least one selected from the group consisting of Ca, Sr, Ba, Zn, and Mn;
- X is at least one selected from the group consisting of F, Cl, Br. and I;
- 6.5≦x≦8.0;
- 0.01≦y≦2.0;
- 3.7≦z≦4.3;
- a=x+y+1+2z−b/2;
- and 1.0≦b≦1.9.
A phosphor activated with europium and capable of absorbing near-ultraviolet light to blue light and emitting green light,
- wherein a substantial composition of the phosphor is represented by a general formula shown below in which x, y, z, w, a, b and c are in the ranges as shown below:
- MxEuyMgSizAlwOaXbNc
- wherein M is at least one selected from the group consisting of Ca, Sr, Ba, Zn, and Mn;
- X is at least one selected from the group consisting of F, Cl, Br, and I;
- 6.5≦x≦8.0;
- 0.01≦y≦2.0;
- 3.7≦z≦4.3;
- 0<w≦0.5;
- a=x+y+1+2z+(3/2)w−b/2−(3/2)c;
- 1.0≦b≦1.9;
- and 0≦c≦3.0.
A phosphor activated with europium and capable of absorbing near-ultraviolet light to blue light and emitting green light,
- wherein a substantial composition of the phosphor is represented by a general formula shown below in which x, y, z, a, and b are in the ranges as shown below:
- CaxEuy(Mg,Mn)SizOaXb
- wherein X is at least one selected from the group consisting of F, Cl, Br, and I;
- 6.0≦x≦10.0;
- 0.01≦y≦2.0;
- 3.7≦z≦5.5;
- a=x+y+1+2z−b/2;
- and 0.80≦b≦1.9.
Dependencies are inferred from the claim text.