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PROBLEM TO BE SOLVED : To provide a vacuum ultraviolet light-excited ultraviolet phosphor having a high light-emitting intensity and capable of outputting the ultraviolet light in a high efficiency. SOLUTION : This vacuum ultraviolet light-excited phosphor consists of gadolinium-activated rare earth aluminum-scandium borate expressed by general formula : (Y1-xGdX)Al3-yScy(BO3)4 (0
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