Luminescent material for solid-state sources of white light
First Claim
1. A luminescent material having the formula:
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[(Y1-x-y-zCex(Ln-1)y(Ln-2)z]3-α
(Al1-p-qGapInq)5O7.80-10.005,wherein α
is a value in the range of 0.20≦
α
≦
2.80wherein x is the atomic fraction of cerium in the range of 0.001<
x<
0.15;
wherein (Ln-1)y is defined as one or more of Gd, Tb, La, Lu and Sm;
wherein 0<
y<
0.90;
wherein (Ln-2)z is defined as one or more of Pr, Nd, Eu, Dy, Ho, Tm, Er and Yb, which are dopants introduced into a cation sub-lattice in the range of 0.0001<
z<
0.01;
wherein x, y and z are present such that 1-x-y-z>
0;
wherein p and q include atomic fractions of gallium and indium in an aluminium sub-lattice, wherein 0<
p<
0.3 and 0<
q<
0.3.
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Accused Products
Abstract
A luminescent material, containing yttrium oxide, oxides of rare-earth metals, as well as aluminum, gallium and indium oxides in a ratio that produces compounds corresponding to the general formula: [(Y1-x-y-zCex(Ln-1)y(Ln-2)z]3-α(Al1-p-qGapInq)5O12-1.5α, where α is a value varying within the 0.20≦α≦2.80 range; x is cerium atomic fraction, in the range of 0.001<x<0.15; (Ln-1)y is one or several lanthanides of the Gd, Tb, La, Lu and Sm, which, together with yttrium and cerium, form the basis of the “cation” sub-lattice, and 0≦y≦0.90. (Ln-2)z is one or several lanthanides of the Pr, Nd, Eu, Dy, Ho, Tm, Er and Yb group. They are dopants introduced into the “cation” sub-lattice at a rate of 0.0001<z<0.01; also x, y and z were selected in such a fashion that 1-x-y-z>0; p and q are atomic fractions of Ga and In in the aluminum sub-lattice. Their ranges are: 0<p<0.3 and 0<q<0.3.
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Citations
6 Claims
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1. A luminescent material having the formula:
-
[(Y1-x-y-zCex(Ln-1)y(Ln-2)z]3-α
(Al1-p-qGapInq)5O7.80-10.005,wherein α
is a value in the range of 0.20≦
α
≦
2.80wherein x is the atomic fraction of cerium in the range of 0.001<
x<
0.15;wherein (Ln-1)y is defined as one or more of Gd, Tb, La, Lu and Sm; wherein 0<
y<
0.90;wherein (Ln-2)z is defined as one or more of Pr, Nd, Eu, Dy, Ho, Tm, Er and Yb, which are dopants introduced into a cation sub-lattice in the range of 0.0001<
z<
0.01;wherein x, y and z are present such that 1-x-y-z>
0;wherein p and q include atomic fractions of gallium and indium in an aluminium sub-lattice, wherein 0<
p<
0.3 and 0<
q<
0.3. - View Dependent Claims (2)
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3. A luminescent material having the formula:
-
[(Y1-x-y-zCex(Ln-1)y(Ln-2)z]3-α
Al5O7.80-10.005;wherein α
is a value in the range of 0.20≦
α
≦
2.80;wherein x is the atomic fraction of cerium in the range of 0.001<
x<
0.15;wherein (Ln-1)y is defined as one or more of Gd, Tb, La, Lu and Sm; wherein 0<
y<
0.90;wherein (Ln-2)z is defined as one of Pr, Nd, Eu, Dy, Ho, Tm, Er and Yb, which are dopants introduced into a cation sub-lattice in the range of 0.0001<
z<
0.01;wherein x, y and z are present such that 1-x-y-z>
0. - View Dependent Claims (4)
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5. A luminescent material having the formula:
-
[(Y1-x-yCex(Ln-1)y]3-α
Al5O7.80-10.005;wherein α
is a value in the range of 0.20≦
α
≦
2.80;wherein x is the atomic fraction of cerium in the range of 0.001<
x<
0.15;wherein (Ln-1)y is defined as one or more of Gd, Tb, La, Lu and Sm; wherein 0<
y<
0.90;wherein 1-x-y>
0. - View Dependent Claims (6)
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Specification