| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluorescent substance to be excited by vacuum ultraviolet rays, extremely slightly causing the reduction of emission intensity caused by the thermal deterioration by paste firing or the vacuum ultraviolet deterioration by the irradiation with the vacuum ultraviolet rays. SOLUTION: The fluorescent substance to be excited by the vacuum ultraviolet rays contains Eu as an activator, at least one kind of an alkaline earth metal element selected from the group consisting of Ba, Sr and Ca, at least one kind of an element selected from the group consisting of Ti, Zr and Hf, and at least one kind of an element selected from Si and Ge. COPYRIGHT: (C)2006,JPO&NCIPI
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