Illumination System Comprising a Red-Emitting Ceramic Luminescence Converter
First Claim
1. Illumination system, comprising a radiation source and a monolithic ceramic luminescence converter comprising at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light;
- wherein said at least one phosphor is an europium(III)-activated rare earth metal sesquioxide of general formula (Y1-xREx)2-yO3;
(Eu1-aAa) wherein RE is selected from the group of gadolinium, scandium, and lutetium, A is selected from the group of bismuth, antimony, dysprosium, samarium, thulium, and erbium, 0≦
x<
1, 0.001≦
z≦
0.2; and
0≦
a<
1.
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Accused Products
Abstract
An illumination system, comprising a radiation source and a monolithic ceramic luminescence converter comprising at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light; wherein said at least one phosphor is an europium(III)-activated rare earth metal sesquioxide of general formula (YY-x-XEx)2-z(EU1-a-3Aa)z, wherein RE is selected from the group of gadolinium, scandium, and lutetium, A is selected from the group of bismuth, antimony, dysprosium, samarium, thulium, and erbium, 0≦x<1, 0.001≦z≦0.2; and 0≦a<1 can provide light sources having high luminosity and color-rendering index, especially in conjunction with a light emitting diode as a radiation source. The invention is also concerned with an amber to red-emitting a monolithic ceramic luminescence converter comprising an europium(III)-activated rare earth metal sesquioxide of general formula (Y1-x-REx)2-zO3:(Eu1-aAa)Z, wherein RE is selected from the group of gadolinium, scandium, and lutetium, A is selected from the group of dysprosium, samarium, thulium, and erbium, 0≦x<1, 0.001≦z≦; and 0≦a<1.
34 Citations
9 Claims
-
1. Illumination system, comprising a radiation source and a monolithic ceramic luminescence converter comprising at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light;
- wherein said at least one phosphor is an europium(III)-activated rare earth metal sesquioxide of general formula (Y1-xREx)2-yO3;
(Eu1-aAa) wherein RE is selected from the group of gadolinium, scandium, and lutetium, A is selected from the group of bismuth, antimony, dysprosium, samarium, thulium, and erbium, 0≦
x<
1, 0.001≦
z≦
0.2; and
0≦
a<
1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- wherein said at least one phosphor is an europium(III)-activated rare earth metal sesquioxide of general formula (Y1-xREx)2-yO3;
-
9. Monolithic ceramic luminescence converter comprising at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light;
- wherein said at least one phosphor is an europium(III)-activated rare earth metal sesquioxide of general formula (Y1-xREx)2-yO3;
(Eu1-aAa), wherein RE is selected from the group of gadolinium, scandium, and lutetium, A is selected from the group of dysprosium, samarium, thulium, and erbium, bismuth, antimony, dysprosium, samarium, thulium, and erbium, 0≦
x<
1, 0.001≦
z≦
0.2; and
0≦
a<
1.
- wherein said at least one phosphor is an europium(III)-activated rare earth metal sesquioxide of general formula (Y1-xREx)2-yO3;
Specification