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The thiogallate phosphors which are well known for phosphors material for CRT or EL device were reported that have high luminescent properties at long-wavelength region. Among these phosphors, the samples with divalent europium doped CaGa2S4 were prepared by simple process under the reduction atmosphere (5% H2/ 95% N2) without toxic gas such as H2S or CS2. The prepared phosphor shows a higher luminescent efficiency (about 120%) than that of YAG:Ce phosphor. Consequently, this phosphor is possible to be applicable to white LED lamp because of the high luminescent efficiency.

Synthesis and Luminescent Characteristics of CaGa2S4:Eu2+Yellow Phosphor for Light Emitting Diode

Synthesis and Luminescent Characteristics of CaGa₂S₄:Eu²⁺Yellow Phosphor for Light Emitting Diode