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US 8,729,790 B2Granted
Coated phosphors and light emitting devices including the same
AssigneeCree, Inc.
InventorsHarry A. Seibel, II, Brian Thomas Collins
Life of this patent
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Abstract
Provided according to embodiments of the invention are method of coating a phosphor that include contacting the phosphor with a sol comprising at least one of silica, alumina, borate and a precursor thereof, to form a coating on the phosphor; and heating the phosphor. Also provided are phosphors that are coated with alumina, silica and/or borate, and light emitting devices that include such phosphors.
Claims9
A light emitting device, comprising:
- a solid state lighting source;
- a lens overlying the solid state lighting source;
- and a phosphor that is coated with alumina, silica and/or borate and is optically coupled to the solid state lighting source, wherein the phosphor has a du′v′ of less than 0.0015 after 840 hours at 85° C. and 85% relative humidity.
Dependencies are inferred from the claim text.