The alkaline earths metal borate fluorescent substance which features that the alkaline earths

摘要

PROBLEM TO BE SOLVED: To provide a fluorescent substance of an alkaline earth metal borate capable of being efficiently exited by long wave-length ultraviolet rays, emitting green light, and having good light resistance; and to provide a light-emitting device having excellent light-emitting characteristics by using the fluorescent substance.;SOLUTION: The fluorescent substance of the alkaline earth metal borate contains calcium, boron, cerium, terbium and oxygen as basic constituent elements. The ratio of the mols of the boron to the mols of the calcium contained in the fluorescent substance is regulated so as to be ≥0.1 and ≤6.0. The fluorescent substance of the alkaline earth metal borate is efficiently exited by the long wave-length ultraviolet rays and emits the green light. The fluorescent substance of the alkaline earth metal borate has a high light-emitting luminance and the excellent light resistance. The light-emitting device using the substance has the high light-emitting efficiency and the excellent light-emitting characteristics.;COPYRIGHT: (C)2005,JPO&NCIPI