Phosphor, method for producing the same and light-emitting device using the same
First Claim
1. A phosphor which comprises a phosphor material having a composition represented by a general formula:
- M(0)aM(1)bM(2)x−
(vm+n)M(3)(vm+n)−
yOnNz−
n, whereinM(0) is one or more elements selected from Li, Na, Be, Mg, Ca, Sr, Ba, Sc, Y, La, Gd, and Lu;
M(1) Eu;
M(2) is one or more elements selected from Si, Ge, Sn, Ti, Hf and Zr;
M(3) is one or more elements selected from Be, B, Al, Ga, In, Tl and Zn;
O is oxygen;
N is nitrogen; and
an atomic ratio of M(0), M(1), M(2), M(3), O and N is adjusted to satisfy the following;
x, y and z satisfy 33≦
x≦
51, 8≦
y≦
12 and 36≦
z≦
56;
a and b satisfy 3≦
a+b≦
7 and 0.001≦
b≦
1.2;
m and n satisfy 0.8 ·
me≦
m≦
1.2 ·
me and 0≦
n≦
7 in which me=a+b; and
v satisfies v={a·
v(0)+b·
v(1)}/(a+b), wherein v(0) is a valence of M(0) ion and v(1) is a valence of M(1) ion, andwherein the phosphor emits 480 to 540-nm light.
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Abstract
The invention is a phosphor which includes a phosphor material having a composition represented by a general formula: M(0)aM(1)bM(2)x−(vm+n)M(3)(vm+n)−yOnNz−n, wherein M(0) is one or more elements selected from Li, Na, Be, Mg, Ca, Sr, Ba, Sc, Y, La, Gd and Lu; M(1) is one or more activators selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb; M(2) is one or more elements selected from Si, Ge, Sn, Ti, Hf and Zr; M(3) is one or more elements selected from Be, B, Al, Ga, In, Tl and Zn; O is oxygen; N is nitrogen; and an atomic ratio of M(0), M(1), M(2), M(3), O and N is adjusted to satisfy the following: x, y and z satisfy 33≦x≦51, 8≦y≦12 and 36≦z≦56; a and b satisfy 3≦a+b≦7 and 0.001≦b≦1.2; m and n satisfy 0.8·me≦m≦1.2·me and 0≦n≦7 in which me=a+b; and v satisfies v={a·v(0)+b·v(1)}/(a+b) (wherein v(0) is a valence of M(0) ion and v(1) is a valence of M(1) ion). The invention also relates to a method for producing the phosphor and a light-emitting device using the phosphor.
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Citations
14 Claims
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1. A phosphor which comprises a phosphor material having a composition represented by a general formula:
- M(0)aM(1)bM(2)x−
(vm+n)M(3)(vm+n)−
yOnNz−
n, whereinM(0) is one or more elements selected from Li, Na, Be, Mg, Ca, Sr, Ba, Sc, Y, La, Gd, and Lu; M(1) Eu; M(2) is one or more elements selected from Si, Ge, Sn, Ti, Hf and Zr; M(3) is one or more elements selected from Be, B, Al, Ga, In, Tl and Zn; O is oxygen; N is nitrogen; and an atomic ratio of M(0), M(1), M(2), M(3), O and N is adjusted to satisfy the following; x, y and z satisfy 33≦
x≦
51, 8≦
y≦
12 and 36≦
z≦
56;a and b satisfy 3≦
a+b≦
7 and 0.001≦
b≦
1.2;m and n satisfy 0.8 ·
me≦
m≦
1.2 ·
me and 0≦
n≦
7 in which me=a+b; andv satisfies v={a·
v(0)+b·
v(1)}/(a+b), wherein v(0) is a valence of M(0) ion and v(1) is a valence of M(1) ion, andwherein the phosphor emits 480 to 540-nm light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- M(0)aM(1)bM(2)x−
Specification