Phosphor and Light-Emitting Device
AssigneeUbe Industries, Ltd.
InventorsJin Amagai, Kouichi Fukuda, Tatsunori Sakaguchi
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Abstract
Provided is a phosphor represented by a composition of the following formula (1), (Sra,Bab,Cac,Eux,M1d,M2e)SiOf.gMgO formula (1) (here, M1 represents at least one group 3 element selected from Lu and Sc, M2 represents an alkali metal element selected from Li, Na, and K, and 0<a≦2, 0<b≦2, 0≦c≦2, 0.0015≦d≦0.045, 0≦e≦0.06, 0<x≦0.1, 3.7≦f≦4.1, and 0≦g≦1 are satisfied). In addition, provided is a light-emitting device including the phosphor and a light source for irradiating the phosphor with excitation light to cause the phosphor to emit light.
Claims11
-5. (canceled)
A phosphor represented by a composition of the following formula (1), emitting green light having a peak wavelength within a range of 510 to 530 nm when the phosphor is excited with light having a wavelength of 400 nm,
- (Sra,Bab,Cac,Eux,M1d,M2e)SiOf.gMgO formula (1)
- where, M1 represents at least one Group 3 element selected from Lu and Sc, M2 represents an alkali metal element selected from Li, Na, and K, and subscripts a-e, x, f and g satisfy the following ranges:
- 0<a≦2, 0<b≦2, 0≦c≦2, 0.0015≦d≦0.045, 0≦e≦0.06, 0<x≦0.1, 3.7≦f≦4.1, and 0≦g≦1 are satisfied.
Dependencies are inferred from the claim text.