beta-TYPE SIALON PHOSPHOR, APPLICATION THEREOF, AND METHOD FOR PRODUCING beta-TYPE SIALON PHOSPHOR

摘要

PROBLEM TO BE SOLVED: To provide a light-emitting member having improved luminous efficiency (external quantum efficiency) of a β-type sialon phosphor for achieving higher luminance of a white light-emitting diode, a light-emitting device thereof, and a production method thereof.

SOLUTION: The β-type sialon phosphor includes β-type sialon represented by general formula Si6-zALzOzN8-z(02+as a light emitting center is formed and is excited with blue light, the β-type sialon phosphor has a peak in the wavelength range of 520-560 nm. The β-type sialon phosphor has average diffuse reflectance of 90% or more at a wavelength of 700-800 nm and diffuse reflectance of 85% or more at a fluorescence peak wavelength.

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