# US 2013/0153825 A1 · Luminscent material for solid-state sources of white light

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- Number: US 2013/0153825 A1
- Document ID: US20130153825A1
- Status: Published application
- Kind: A1
- Application number: 13/820,632
- Filed: 2010-10-22
- Published: 2013-06-20
- Earliest claimed: 2010-10-22
- Inventors: Anatoly Vasilyevich Vishnyakov; Yaohui Chang; Ekaterina Analtolyevna Vishniakova
- Web page: https://patentgrep.com/patent/US20130153825A1

## CPC

- C09K 11/7774: {Aluminates}
- H10H 20/8512: {Wavelength conversion materials}
- Y02B 20/00: Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

## Abstract

A luminescent material, containing yttrium oxide, oxides of rare-earth metals, as well as aluminium, gallium and indium oxides in a ratio that produces compounds corresponding to the general formula: [(Y1-x-y-zCexΣ(Ln-1)yΣ(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, varying in the 0.001<x<0.15 range; Σ(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. Σ(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 aluminium sub-lattice. Their ranges are: 0<p<0.3 and 0<q<0.3. This invention also claims luminescent materials based on the following compounds: [(Y1-x-y-zCexΣ(Ln-1)yΣ(Ln-2)z]2.5(Al1-p-qGapInq)5O11.25 and [(Y1-x-y-zCexΣ(Ln-1)yΣ(Ln-2)z]1.67(Al1-p-qGapInq)5O10, as well as the material with (3-α) index varying between 1.67 and 0.20, and which is a of two-phases system: one phase has the composition: [(Y1-x-y-zCexΣ(Ln-1)yΣ(Ln-2)z]1.67(Al1-p-qGapInq)5O10 while the other phase is aluminium oxide Variations of the cation composition ensures the capability to vary the colour temperature of a solid source of white light based on blue-radiating light diodes from 2,500 to 15,000 K.

## Claims

### Claim at position 1

-15. (canceled)

### Claim 16

A luminescent material for solid sources of white light, based on blue-emission light diodes InGaN, wherein the material contains yttrium oxide, oxides of rare-earth metals as well as aluminium, gallium and indium oxides, wherein the material has the formula of:
[(Y1-x-y-zCexΣ0(Ln-1)yΣ(Ln-2)z]3-α(Al1-p-qGapInq)5O12-1.5α,
wherein α is a value in the range of 0.20≦α≦2.80 such that the stoichiometric index of oxygen varies in the range of 11.70≧O12-1.5.60 ≧7.80;
wherein x is the atomic fraction of cerium in the range of 0.001<x<0.15;
wherein Σ(Ln-1)y includes one or more lanthanides of the Gd, Tb, La, Lu and Sm group, constituting, together with yttrium and cerium, the basis of a cation sub-lattice;
wherein y varies in the range of 0<y<0.90;
wherein Σ(Ln-2)z includes one or more lanthanides of the Pr, Nd, Eu, Dy, Ho, Tm, Er and Yb group, which are dopants introduced into the cation sub-lattice in a concentrations 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 p varies in the range of 0<p<0.3 and q varies in the range of 0<q<0.3.

### Claim 17 (depends on 16)

The luminescent material according to claim 16, wherein the stoichiometric index (3-α) has the formula of:
[(Y1-x-y-zCexΣ0(Ln-1)yΣ(Ln-2)z]3-α(Al1-p-qGapInq)5O12-1.5α;
wherein the stoichiometric index varies in the range of 2.80≧(3-α)≧1.67, while the index of oxygen simultaneously changes within the range of 11.7≧O12-1.5α≧10.00.

### Claim 18 (depends on 16)

The luminescent material according to claim 16, based on a composition having the formula of:
[(Y1-x-y-zCexΣ(Ln-1)yΣ(Ln-2)z]2.5(Al1-p-qGapInq)5O11.25.

### Claim 19 (depends on 16)

The luminescent material according to claim 16, based on a composition having the formula of:
[(Y1-x-y-zCexΣ(Ln-1)yΣ(Ln-2)z]1.67(Al1-p-qGapInq)5O10.

### Claim 20 (depends on 16)

The luminescent material according to claim 16, wherein the stoichiometric index (3-α) changes from 1.67 to 0.20, and is a two-phases system, wherein one phase has a composition having the formula of:
[(Y1-x-y-zCexΣ(Ln-1)yΣ(Ln-2)z]1.67(Al1-p-qGapInq)5O10,
wherein the other phase is aluminium oxide.

### Claim 21

A luminescent material for solid-state sources of white light based on blue-emission InGaN diodes, which contains yttrium oxide, oxides of rare-earth metals, as well as aluminium oxide, wherein the material has the formula of:
[(Y1-x-y-zCexΣ(Ln-1)yΣ(Ln-2)z]3-αAl5O12-1.5α;
wherein α has a value changing within the range of 0.20≦α≦2.80 such that the stoichiometric index of oxygen varies in the range of 11.70≧O12-1.5α≧7.80;
wherein x is the atomic fraction of cerium, varying in the range of 0.001<x<0.15;
wherein Σ(Ln-1)y includes one or more lanthanides of the Gd, Tb, La, Lu and Sm group, which, together with yttrium and cerium, constitute the basis of a cation sub-lattice;
wherein y varies in the range of 0<y<0.90;
wherein Σ(Ln-2)z includes one or several lanthanides of the Pr, Nd, Eu, Dy, Ho, Tm, Er and Yb group, which are dopants introduced into the cation sub-lattice in concentrations in the range of 0.0001<z<0.01;
wherein x, y and z are present such that 1-x-y-z>0.

### Claim 22 (depends on 21)

The luminescent material as in claim 21, wherein the stoichiometric index (3-α) has the formula of:
[(Y1-x-y-zCexΣ(Ln-1)yΣ(Ln-2)z]3-αAl5O12-1.5α, wherein the stoichiometric index (3-α) varies in the range of 2.8≧(3-α)≧1.67, while the oxygen index varies in the range of 11.7≧O12-1.5α≧10.00.

### Claim 23 (depends on 21)

The luminescent material as in claim 21, based on a composition having the formula of:
[(Y1-x-y-zCexΣ(Ln-1)yΣ(Ln-2)z]2.50Al5O11.25.

### Claim 24 (depends on 21)

The luminescent material as in claim 21, based on a composition having the formula of:
[(Y1-x-y-zCexΣ(Ln-1)yΣ(Ln-2)z]1.67Al5O10.00.

### Claim 25

A luminescent material, having a stoichiometric index (3-α) index which varies in the range of 1.67 to 0.2 and which is a two-phases system, wherein one phase has the formula of:
[(Y1-x-y-zCexΣ(Ln-1)yΣ(Ln-2)z]1.67Al5O10.00;
wherein the other phase is aluminium oxide.

### Claim 26

A luminescent material for solid sources of white light based on blue-emitting light diodes InGaN, which contains oxides of yttrium and rare-earth metals as well as aluminium oxide, wherein the material has the formula of:
[(Y1-x-yCexΣ(Ln-1)y]3-αAl5O12-1.5α;
wherein α varies in the range of 0.20≦α≦2.80, such that the stoichiometric index of oxygen varies in the 11.7≧O12-1.5α≧7.80 range;
wherein x is the atomic fraction of cerium, which varies in the 0.001<x<0.15 range;
wherein Σ(Ln-1)y includes one or more lanthanides of the Gd, Tb, La, Lu and Sm group, which, together with yttrium and cerium, form the basis of a cation sub-lattice;
wherein y varies in the range of 0<y<0.90;
wherein x and y are present such that 1-x-y>0.

### Claim 27 (depends on 26)

The luminescent material according to claim 26, wherein the stoichiometric index (3-α) index has the formula of:
[(Y1-x-yCexΣ(Ln-1)y]3-αAl5O12-1.5α varying in the range of 2.80≧(3-α)≧1.67, while the index of oxygen varies in the range of 11.7≧O12-1.5α≧10.00.

### Claim 28 (depends on 26)

The luminescent material according to claim 26, based on a composition having the formula of:
[(Y1-x-yCexΣ(Ln-1)y]2.50Al5O11.25.

### Claim 29 (depends on 26)

The luminescent material according to claim 26, based on a composition having the formula of:
[(Y1-x-y-zCexΣ(Ln-1)y]1.67Al5O10.00.

### Claim 30 (depends on 26)

The luminescent material according to claim 26, wherein the stoichiometric index (3-α) of which varies in the range of 1.67 to 0.2 and which is a two-phases system, wherein one phase has the formula of:
[(Y1-x-y-zCexΣ(Ln-1)y]1.67Al5O10;
wherein the other phase is aluminium oxide.