Red phosphor for LED based lighting
AssigneeLumination LLC
InventorsAnant Achyut Setlur, Alok Mani Srivastava, Holly Ann Comanzo
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Abstract
Disclosed are phosphor compositions having the formula (RE1-yCey)Mg2-xLixSi3-xPxO12, where RE is at least one of Sc, Lu, Gd, Y, and Tb, 0.0001<x<0.1 and 0.001<y<0.1. When combined with at least one additional phosphor and subjected to radiation from a blue or UV LED, these phosphors can provide white light sources with good color quality having high CRI over a large color temperature range. Also disclosed are blends of the above phosphors and additional phosphors.
Claims16
A lighting apparatus for emitting white light comprising:
- a light source emitting with a peak radiation at from about 250 nm to about 550 nm;
- and
- a phosphor composition radiationally coupled to the light source, the phosphor composition comprising (RE1-yCey)2CaMg2-xLixSi3-xPxO12, where RE is at least one of Sc, Lu, Gd, Y, and Tb, 0.0001<x<0.1 and 0.001<y<0.1.
A phosphor composition (RE1-yCey)2CaMg2-xLixSi3-xPxO12, where RE is at least one of Sc, Lu, Gd, Y, and Tb, 0.0001<x<0.1 and 0.001<y<0.1.
A phosphor blend including a first phosphor comprising (RE1-yCey)2CaMg2-xLixSi3-xPxO12, where RE is at least one of Sc, Lu, Gd, Y, and Tb, 0.0001<x<0.1 and 0.001<y<0.1;
- and at least one additional phosphor, wherein the phosphor blend is capable of emitting light suitable for use in general illumination when subjected to radiation emitted by a light source radiationally coupled to said phosphor blend, either alone or in combination with said radiation emitted by said light source.
Dependencies are inferred from the claim text.