Phosphor for light sources, and associated light source
AssigneePatent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH
InventorsAndries Ellens, Franz Zwaschka
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Abstract
The phosphor according to the invention has the following composition: (RE1−x−yPrxCey)3(Al,Ga)5O12, where RE=Y, Sc, Tb, Gd, La and/or Lu; 0.00001<x<0.05; 0.01<y<0.2.
Claims29
Phosphor for excitation by a light-emitting radiation source, the emission from which lies in the short-wave optical spectral region between 420 and 490 nm, having a garnet structure A3B5O12, which is activated with Ce, the second component B representing at least one of the elements Al and Ga, wherein the first component A contains a rare earth RE selected from the group consisting of Y, Tb, La and/or Lu, with a proportion of at most 5 mol %, of A being replaced by praseodymium, praseodymium acting as second activator in addition to Ce according to the formula A3B5O12:
- (Ce,Pr).
A phosphor having the general formula:
- (RE1−x−yPrxCey)3(Al,Ga)5O12
- where
- RE=Y, Sc, Gd, Tb, La and/or Lu,
- 0.00005≦x≦0.05, and
- 0.03≦y≦0.1;
- and
- the phosphor having a broad band yellow emission and a narrow band red emission below 650 nm in response to excitation from a radiation source having an emission from 420 nm to 490 nm.
A phosphor having the general formula (Y0.959Ce0.04Pr0.001)3Al5O12.
Dependencies are inferred from the claim text.