METHOD FOR PRODUCING SILICATE PHOSPHOR
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United States of America Patent
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Aug 4, 2016
app pub date -
Sep 12, 2014
filing date -
Sep 13, 2013
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Abstract
A silicate phosphor produced by a method of firing in a reducing atmosphere a mixture comprising a silicon compound, a strontium compound and a barium compound in a ratio providing strontium barium silicate and a europium compound in the presence of two or more halide compounds selected from a group consisting of fluoride, chloride and bromide exhibits higher external quantum efficiency to a light in the wavelength region of ultraviolet light to blue light, as compared with a silicate phosphor produced by a method of firing in a reducing atmosphere the mixture in the presence of a single halide.
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