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US 2015/0083967 A1Published application
Phosphor, Method for Manufacturing same, and light-emitting device
AssigneesKoha Co., Ltd., National Institute for Materials Science
InventorsMakoto Watanabe, Daisuke Inomata, Kazuo Aoki, Kiyoshi Shimamura, Encarnacion Antonia Garcia Villora
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Abstract
A phosphor (and a method for manufacturing the same, and a light-emitting device that uses this phosphor) includes single crystals including YAG crystals as a mother crystal, the quantum efficiency of the phosphor at 25° C. being 92% or higher at an excitation light wavelength of 460 nm.
Claims18
A phosphor, comprising:
- single crystals comprising YAG crystals as a mother crystal,
- wherein the quantum efficiency of the phosphor at 25° C. is not less than 92% when an excitation light wavelength is 460 nm.
A phosphor, comprising:
- YAG crystals as a mother crystal,
- wherein reduction of fluorescence intensity of the phosphor is less than 3% when an excitation light wavelength is 460 nm and a temperature is increased from 25 to 100° C.
A phosphor, comprising:
- YAG crystals as a mother crystal,
- wherein variation of the full width at half maximum (FWHM) of fluorescence spectrum of the phosphor is not more than 1.5 nm when the excitation light wavelength is varied from 460 to 480 nm.
Dependencies are inferred from the claim text.