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AssigneesShizuo Fujita, Yoichi Kawakami, Mitsuru Funato, Masafumi Harada, Sharp Kabushiki Kaisha
InventorsHajime Saito, Tatsuya Morioka, Shizuo Fujita, Yoichi Kawakami, Mitsuru Funato, Masafumi Harada
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A fluorescent material excellent in emission efficiency in white emission and a light-emitting apparatus employing this fluorescent material and having excellent color rendering are provided with a fluorescent material comprising a two-layer structure of a core of a particle size having a quantum effect and a shell covering this core in which the ground state energy of the core is in the range of 1.85 to 2.05 eV, the high order energy of the core is not in the ranges of 2.3 to 2.5 eV and 2.65 to 2.8 eV, or the ground state energy of the core is in the range of 2.3 to 2.5 eV, the high order energy of the core is not in the range of 2.65 to 2.8 eV an light-emitting apparatus employing these fluorescent materials.
A fluorescent material comprising a two-layer structure of a core of a particle size having a quantum effect and a shell covering said core, wherein
A light-emitting apparatus comprising a red fluorescent material and a green fluorescent material homogeneously dispersed in a medium for presenting white emission as a whole by absorbing blue excitation light with said red fluorescent material and said green fluorescent material and generating secondary light, wherein
Dependencies are inferred from the claim text.