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AssigneesSharp Kabushiki Kaisha, National Institute for Materials Science
InventorsKenichi Yoshimura, Kohsei Takahashi, Hiroshi Fukunaga, Naoto Hirosaki
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There is realized a light-emitting device that emits, with high efficiency, white light with excellent color rendering index. A light-emitting device (1) of the present invention is a light-emitting device (1) for emitting white light, including at least a light-emitting element (2) for emitting blue light, an orange fluorescent material (13) which absorbs the blue light so as to emit orange light, and a green fluorescent material (14) which absorbs the blue light so as to emit green light, the orange fluorescent material (13) being a Ce-activated CaAlSiN3 fluorescent material in a solid solution crystal form in which Ce and oxygen are dissolved in a crystal having a composition of cCaAlSiN3·(1−c)LiSi2N3 where 0.2≦c≦0.8, and the orange fluorescent material (13) containing 2 weight % or more of Ce.
A light-emitting device for emitting white light, comprising at least a light-emitting element for emitting blue light, an orange fluorescent material which absorbs the blue light so as to emit orange light, and a green fluorescent material which absorbs the blue light so as to emit green light,
Dependencies are inferred from the claim text.