Thiogallate phosphor and white light emitting device employing the same

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Excited by ultraviolet or blue light, than the relatively [...] thio which emits light a phosphor and is disclosure is white light emitting device. The phosphor the general formula is (A 1-x-y Eu x M IIIy) (B 2-y M II y) S 4 (stage, < 0.995 < y < x 0.005 < 0.9, 0, x+y < 1) is represented by. Wherein, A has barium (Ba), strontium (Sr) and calcium (Ca) selected from the group consisting of at least one element and, B aluminum (Al), gallium (Ga) and stirred and heated to prepare a gel (In) doorplate selected from the group consisting of at least one element and, M III the scandium (Sc), lanthanum (La), gadolinium (Gd) and lutetium (Lu) at least one selected from the group consisting of rare earth element and, M II the milligram, Zn and Be selected from the group consisting of is at least one element. The, AB 2 S 4 : Eu having the general structure thio [...] selected can be increase the light emitting efficiency.