Phosphors containing oxides of alkaline-earth and group-IIIB metals and white-light sources incorporating same
First Claim
1. A phosphor comprising a material having a formula of AMgD10O17:
- Eu2+,Mn2+, wherein A is at least an alkaline-earth metal selected from the group consisting of Ba, Sr, Ca, and combinations thereof; and
D is at least a metal selected from the group consisting of Ga, In, and combinations thereof;
wherein Eu2+ ions are present in an amount from about 10 to about 50 atom percent of a combined quantity of A ions and europium ions, and Mn2+ ions are present in an amount from about 5 to about 30 atom percent of a combined quantity of magnesium ions and manganese ions.
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Accused Products
Abstract
A phosphor comprises a material having a formula of AMgD10O17:Eu2+,Mn2+, wherein A is at least an alkaline-earth metal selected from the group consisting of Ba, Sr, Ca, and combinations thereof; and D is at least a metal selected from the group consisting of Al, Ga, In, and combinations thereof; wherein Eu2+ ions are present in an amount from about 10 to about 50 atom percent of a combined quantity of A ions and europium ions, and Mn2+ ions are present in an amount from about 5 to about 30 atom percent of a combined quantity of magnesium ions and manganese ions. The phosphor is used alone or in conjunction with other phosphors to convert UV/blue radiation emitted by a source, such as an LED or a gas discharge device, to visible light.
112 Citations
32 Claims
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1. A phosphor comprising a material having a formula of AMgD10O17:
- Eu2+,Mn2+, wherein A is at least an alkaline-earth metal selected from the group consisting of Ba, Sr, Ca, and combinations thereof; and
D is at least a metal selected from the group consisting of Ga, In, and combinations thereof;
wherein Eu2+ ions are present in an amount from about 10 to about 50 atom percent of a combined quantity of A ions and europium ions, and Mn2+ ions are present in an amount from about 5 to about 30 atom percent of a combined quantity of magnesium ions and manganese ions. - View Dependent Claims (3, 4)
- Eu2+,Mn2+, wherein A is at least an alkaline-earth metal selected from the group consisting of Ba, Sr, Ca, and combinations thereof; and
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2. A phosphor comprising a material having a formula of AMgD10O17:
- Eu2+,Mn2+, wherein A is at least an alkaline-earth metal selected from the group consisting of Sr, Ca, and combinations thereof; and
D is at least a metal selected from the group consisting of Ga, In, and combinations thereof;
wherein Eu2+ ions are present in an amount from about 10 to about 50 atom percent of a combined quantity of A ions and europium ions, and Mn2+ ions are present in an amount from about 5 to about 30 atom percent of a combined quantity of magnesium ions and manganese ions.
- Eu2+,Mn2+, wherein A is at least an alkaline-earth metal selected from the group consisting of Sr, Ca, and combinations thereof; and
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5. A method for producing a phosphor, the method comprising:
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providing amounts of oxygen-containing compounds of magnesium;
europium;
manganese;
at least another alkaline-earth metal, which is selected from the group consisting of barium, strontium, calcium, and combinations thereof; and
at least a metal of Group III-B of the Periodic Table of the Elements, the metal of Group-IIIB being selected from the group consisting of Ga, In, and combinations thereof;mixing together the oxygen-containing compounds to form a mixture; and firing the mixture at a temperature between about 1000°
C. and about 1600°
C. under a reducing atmosphere for a sufficient period of time to convert the mixture to said phosphor having a formula of (A1−
aEua)(Mg1−
bMnb)D10O17;
wherein A is said at least another alkaline-earth metal, D is said at least a metal of Group-IIIB, 0.001<
a≦
0.5, and 0.001<
b≦
0.3. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A method for producing a phosphor, the method comprising:
-
providing a first solution that comprises compounds of magnesium;
europium;
manganese;
at least another alkaline-earth metal, which is selected from the group consisting of barium, strontium, and calcium; and
at least a Group-IIIB metal selected from the group consisting of Ga, In, and combinations thereof;providing a second solution, which comprises at least a compound that is capable of producing a precipitate when the first and second solutions are mixed together; mixing the first and second solutions to produce a precipitate containing magnesium, europium, manganese, said at least another alkaline-earth metal, and said at least a Group-IIIB metal; and firing the mixture under a reducing atmosphere at a temperature and for a sufficient period of time to convert the mixture to a phosphor having a formula of(A1−
aEua)(Mg1−
b Mnb)D10O17;
wherein A is said at least another alkaline-earth metal;
D is said at least a Group-IIIB metal;
0.001<
a≦
0.5, and 0.001<
b≦
0.3. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A phosphor blend comprising:
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a phosphor comprising a material having a formula of AMgD10O17;
Eu2+,Mn2+, wherein A is at least an alkaline-earth metal selected from the group consisting of Ba, Sr, Ca, and combinations thereof; and
D is at least a metal selected from the group consisting of Ga, In, and combinations thereof;
wherein Eu2+ ions are present in an amount from about 10 to about 50 atom percent of a combined quantity of A ions and europium ions, and Mn2+ ions are present in an amount from about 5 to about 30 atom percent of a combined quantity of magnesium ions and manganese ions; andat least another phosphor emitting a light color selected from the group consisting of blue, blue-green, green, yellow, yellow-orange, orange-red, and red. - View Dependent Claims (22, 23)
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24. A light source emitting visible light, the light source comprising:
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a radiation source that emits in a wavelength range from about 250 nm to about 480 nm; and a phosphor having a fonnula of (A1−
aEua)(Mg1−
bMnb)D10O17;
wherein A is at least an alkaline-earth metal other than Mg, D is at least a Group-IIIB consisting of Ga, In, and combinations thereof;
0.001<
a≦
0.5, and 0.001<
b ≦
0.3, which phosphor is disposed adjacent to the radiation source to receive the radiation and emit the visible light. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
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Specification