Phosphor for light sources and associated light source
OwnerFranz Kummer, Franz Zwaschka +3inventors
InventorsFranz Kummer, Franz Zwaschka, Andries Ellens, Alexandra Debray, Guenther Waitl
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Abstract
A phosphor for light sources, the emission from which lies in the short-wave optical spectral region, as a garnet structure A3B5O12. It is activated with Ce, the second component B representing at least one of the elements Al and Ga, and the first component A is terbium or terbium together with at least one of the elements Y, Gd, La and/or Lu. In a preferred embodiment, a phosphor having a garnet of structure (Tb1-x-yRExCey)3(Al,Ga)5O12, where RE=Y, Gd, La and/or Lu; 0≦x≦0.5−y; 0<y<0.1 is used.
Claims9
1-11. (canceled)
A process for producing an Al-containing Tb-garnet phosphor, a Ga-containing Tb-garnet phosphor, or a Ga,Al-containing Tb-garnet phosphor, the process comprising:
- (a) intimately mixing an oxide of cerium, an oxide of terbium or terbium and at least one of Y, Gd, La, and/or Lu, at least one oxide of Al and Ga, and at least one flux to form a mixture;
- and
- (b) firing the mixture in forming gas to form the phosphor.
Dependencies are inferred from the claim text.