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PHOSPHOR MATERIAL AND LIGHT-EMITTING DEVICE

2025-06-21 01:531080下载
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PROBLEM TO BE SOLVED : To provide a phosphor material having high conversion efficiency, in which temperature dependence of luminance is high at high temperature.SOLUTION : A phosphor material according to an embodiment has a main component represented by A2-v-w-x-yBvLnwEuxSmyM2-zDzO8, where A is at least one element selected from the group consisting of alkaline-earth metal elements; B is at least one element selected from the group consisting of alkali metal elements; Ln is at least one element selected from the group consisting of rare-earth elements other than Eu and Sm; M is at least one element selected from the group consisting of W and Mo; D is at least one element selected from the group consisting of Nb and Ta; and v, w, x, y, and z satisfy 0≤v≤0.5, 0.15≤x+y≤0.7, 0≤y≤0.05, 0
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