Rare earth metal and a transition metal is doped with phosphor of a type Ca1 + x Sr1-x GayIn2-ySzSe3

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PROBLEM TO BE SOLVED : To synthesize selective crystalline phases of various alloy systems that have higher quantum conversion efficiencies and performance characteristics suitable for device fabrication and operation. SOLUTION : There is disclosed energy down conversion phosphors represented by the chemical formula Ca1+xSr1-xGayIn2-ySzSe3-zF2 (wherein 0≤x≤1, 0≤y≤2, 0≤z≤3) doped with rare earth and/or transition metal elements is disclosed. Dopant impurities may be one or more species such as Eu, Ce, Mn, Ru, and/or mixtures thereof present as activators. The molar fractions x, y and z, the dopant species and the dopant concentration may be varied to tune the peak emission wavelength and/or the width of the emission peak. COPYRIGHT : (C)2012, JPO&INPIT