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Oxycarbonitride phosphors and light emitting devices using the same

United States Patent

8,771,547
July 8, 2014
View the Complete Patent at the US Patent & Trademark Office
Disclosed herein is a novel family of oxycarbonitride phosphor compositions and light emitting devices incorporating the same. Within the sextant system of M--Al--Si--O--N--C--Ln and quintuplet system of M--Si--O--N--C--Ln (M=alkaline earth element, Ln=rare earth element), the phosphors are composed of either one single crystalline phase or two crystalline phases with high chemical and thermal stability. In certain embodiments, the disclosed phosphor of silicon oxycarbonitrides emits green light at wavelength between 530-550 nm. In further embodiments, the disclosed phosphor compositions emit blue-green to yellow light in a wavelength range of 450-650 nm under near-UV and blue light excitation.
Li; Yuanqiang (Plainsboro, NJ), Romanelli; Michael Dennis (North Plainfield, NJ), Tian; Yongchi (Princeton Junction, NJ)
Lightscape Materials, Inc. (Princeton, NJ)
13/ 950,354
20140159567
July 25, 2013
This invention was made with U.S. Government support under Department of Energy grant number DE-EE0003245. The U.S. Government may have certain rights in this invention.