Phosphor

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PROBLEM TO BE SOLVED : To provide a phosphor capable of efficiently emitting visible light with a strong excitation band in an ultraviolet light region or a short-wavelength visible light region. SOLUTION : The phosphor is expressed by general formula M1O2-aM2O-bM3X2 : M4, where M1 represents at least one element selected from the group consisting of Si, Ge, Ti, Zr, and Sn; M2 represents at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; M3 represents at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; X represents at least one halogen element; M4 represents at least one element including Eu2+ as an essential element selected from the group consisting of rare earth elements and Mn; and a and b satisfy 0.1≤a≤1.3 and 0.1≤b≤0.25, respectively. COPYRIGHT : (C)2015, JPO&INPIT