Oxynitride phosphor and light-emitting instrument
First Claim
1. An oxynitride fluorescent material, which contains as a main component a JEM phase represented by a general formula MA1(Si6−
- zAlz)N10−
zOz wherein M is one or two or more elements selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu.
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Accused Products
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 to contain as the primary constituent a JEM phase represented by a general formula MA1(Si6−zAlz)N10−zOz wherein M is one or two or more elements selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. For instance, this fluorescent material has a fluorescent spectrum maximum emission wavelength of 420 nm to 500 nm inclusive and an excitation spectrum maximum emission excitation wavelength of 250 nm to 400 nm inclusive.
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Citations
29 Claims
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1. An oxynitride fluorescent material, which contains as a main component a JEM phase represented by a general formula MA1(Si6−
- zAlz)N10−
zOz wherein M is one or two or more elements selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. - View Dependent Claims (2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
- zAlz)N10−
-
8. An oxynitride fluorescent material, which contains elements M, Si, Al, O and N where M is one or two or more elements selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Gd, Th, Dy, Ho, Er, Tm, Yb and Lu, and which has a composition represented by a compositional formula MaSibAlcOdNe where a=1, and satisfying all conditions:
b=(6−
z)×
f
(i)
c=(1+z)×
g
(ii)
d=z×
h
(iii)
e=(10−
z)×
i
(iv)
0.1≦
z≦
3
(v)
0.7≦
f≦
1.3
(vi)
0.7≦
g≦
3
(vii)
0.7≦
h≦
3
(viii)
0.7≦
i≦
1.3
(ix)- View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
Specification