LIGHT EMITTING DEVICES WITH MIXED PHOSPHORS

摘要

The invention provides mixed phosphor compositions, and light emitting devices which use the phosphors. The compositions comprise a first component described by the formula: M1S<SUB>x</SUB>Se<SUB>y</SUB>:B1 and a second component that comprises a material described by the formula M2A<SUB>m </SUB>(S<SUB>p</SUB>Se<SUB>q</SUB>)<SUB>n</SUB>:B2, in which: M1 and M2 may be any metal species and B1 and B2 may be any activator, typically a metal species, with the remaining variables representing effective numerical values necessary for conferring electrical neutrality to the compositions. A phosphor mixture according to the invention may be produced by first preparing individual components, and then physically mixing the components, as in a mortar or ball mill.