Phosphor and use thereof
First Claim
Patent Images
1. A phosphor containing a crystal phase having the chemical composition expressed by the general formula [1]:
-
(1−
a−
b)(Ln′
pMII′
1−
pMIII′
MIV′
N3).a(MIV′
(3n+2)/4NnO).b(AMIV′
2N3)
[1]wherein in the general formula [1], Ln′
is at least one metal element selected from the group consisting of lanthanoids, Mn, and Ti;
MnII′
represents one or more elements selected from the group consisting of divalent metal elements except the Ln′
element;
MIII′
represents one or more elements selected from the group consisting of trivalent metal elements;
MIV′
represents one or more elements selected from the group consisting of tetravalent metal elements;
A represents one or more monovalent metal elements selected from the group consisting of Li, Na, and K;
p satisfies 0<
p≦
0.2; and
a, b, and n satisfy 0≦
a, 0≦
b, a+b>
0, 0≦
n, and 0.002≦
(3n+2)a/4≦
0.9, andwhich is a mixture of a crystal phase having the chemical composition expressed by the general formula [1], a crystal phase having a crystal structure different from that of said crystal phase (hereinafter referred to as “
other crystal phase”
), and/or an amorphous phase, wherein the proportion of the crystal phase having the chemical composition expressed by the general formula [1] in the mixture is 20% by mass or more.
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Accused Products
Abstract
A phosphor which emits light having high brightness, serves as an excellent orange or red phosphor whose light brightness is less decreased when exposed to an excitation source contains a crystal phase having the chemical composition expressed by the general formula [1]:
(1−a−b)(Ln′pMII′1−pMIII′MIV′N3).a(MIV′(3n+2)/4NnO).b(AMIV′2N3) [1]
- wherein Ln′ represents a metal element selected from the group consisting of lanthanoids, Mn, and Ti; MnII′ represents a divalent metal element except the Ln′ element; MIII′ represents a trivalent metal element; MIV′ represents a tetravalent metal element; A represents a metal element selected from the group consisting of Li, Na, and K; 0<p≦0.2; 0≦a, 0≦b, a+b>0, 0≦n, and 0.002≦(3n+2)a/4≦0.9.
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Citations
42 Claims
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1. A phosphor containing a crystal phase having the chemical composition expressed by the general formula [1]:
-
(1−
a−
b)(Ln′
pMII′
1−
pMIII′
MIV′
N3).a(MIV′
(3n+2)/4NnO).b(AMIV′
2N3)
[1]wherein in the general formula [1], Ln′
is at least one metal element selected from the group consisting of lanthanoids, Mn, and Ti;
MnII′
represents one or more elements selected from the group consisting of divalent metal elements except the Ln′
element;
MIII′
represents one or more elements selected from the group consisting of trivalent metal elements;
MIV′
represents one or more elements selected from the group consisting of tetravalent metal elements;
A represents one or more monovalent metal elements selected from the group consisting of Li, Na, and K;
p satisfies 0<
p≦
0.2; and
a, b, and n satisfy 0≦
a, 0≦
b, a+b>
0, 0≦
n, and 0.002≦
(3n+2)a/4≦
0.9, andwhich is a mixture of a crystal phase having the chemical composition expressed by the general formula [1], a crystal phase having a crystal structure different from that of said crystal phase (hereinafter referred to as “
other crystal phase”
), and/or an amorphous phase, wherein the proportion of the crystal phase having the chemical composition expressed by the general formula [1] in the mixture is 20% by mass or more. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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10. A phosphor containing a crystal phase having the chemical composition expressed by the general formula [10]:
-
(EuyLn″
wMII1−
y−
wMIIIMIVN3)1−
x(MIV(3n+2)/4NnO)x
[10]wherein in the general formula [10], Ln″
is at least one metal element selected from the group consisting of lanthanoids except Eu, Mn, and Ti;
MII represents divalent metal elements including Mg, Ca, Sr, Ba, and Zn at a ratio of 90 mol % or more in total;
MIII represents trivalent metal elements including Al at a ratio of 80 mol % or more;
MIV represents tetravalent metal elements including Si at a ratio of 90 mol % or more;
y satisfies 0<
y≦
0.2;
w satisfies 0≦
w<
0.2;
x satisfies 0<
x≦
0.45;
n satisfies 0≦
n; and
n and x satisfy 0.002≦
(3n+2)x/4≦
0.9. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A phosphor containing a crystal phase having a chemical composition expressed by the general formula [21]:
-
(CeyLnzMII1−
y−
zMIIIMIVN3)1−
x(MIV(3n+2)/4NnO)x
[21]wherein in the general formula [21], Ln is at least one metal element selected from the group consisting of lanthanoids except Ce, Mn, and Ti;
MII represents divalent metal elements including Mg, Ca, Sr, Ba, and Zn at a ratio of 90 mol % or more in total;
MIII represents trivalent metal elements including Al at a ratio of 80 mol % or more;
MIV represents tetravalent metal elements including Si at a ratio of 90 mol % or more;
x satisfies 0<
x≦
0.45;
y satisfies 0<
y≦
0.2;
z satisfies 0≦
z≦
0.2;
n satisfies 0≦
n; and
n and x satisfy 0.002≦
(3n+2)x/4≦
0.9. - View Dependent Claims (19, 20, 21)
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-
22. A phosphor containing a crystal phase having a chemical composition expressed by the general formula [31]:
-
(EuyMII1−
yMIIIMIVN3)1−
(AMIV2N3)x′
[31]wherein in the general formula [31], MII represents divalent metal elements including Mg, Ca, Sr, Ba, and Zn at a ratio of 90 mol % or more in total;
MIII represents trivalent metal elements including Al at a ratio of 80 mol % or more;
MIV represents tetravalent metal elements including Si at a ratio of 90 mol % or more;
A represents one or more metal elements selected from the group consisting of Li, Na, and K;
x′
satisfies 0<
x′
<
0.5; and
y satisfies 0<
y≦
0.2. - View Dependent Claims (23, 24, 25)
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Specification