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Alkaline and alkaline earth metal phosphate halides and phosphors

United States Patent

November 13, 2012
View the Complete Patent at the US Patent & Trademark Office
Compounds, phosphor materials and apparatus related to nacaphite family of materials are presented. Potassium and rubidium based nacaphite family compounds and phosphors designed by doping divalent rare earth elements in the sites of alkaline earth metals in the nacaphite material families are descried. An apparatus comprising the phosphors based on the nacaphite family materials are presented herein. The compounds presented is of formula A.sub.2B.sub.1-yR.sub.yPO.sub.4X where the elements A, B, R, X and suffix y are defined such that A is potassium, rubidium, or a combination of potassium and rubidium and B is calcium, strontium, barium, or a combination of any of calcium, strontium and barium. X is fluorine, chlorine, or a combination of fluorine and chlorine, R is europium, samarium, ytterbium, or a combination of any of europium, samarium, and ytterbium, and y ranges from 0 to about 0.1.
Lyons; Robert Joseph (Burnt Hills, NY), Setlur; Anant Achyut (Niskayuna, NY), Cleaver; Robert John (West Charlton, NY)
General Electric Company (Niskayuna, NY)
12/ 873,090
August 31, 2010
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT This invention was made with Government support under contract number DE-FC26-06NT42934 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.