β-SIALON FLUORESCENT MATERIAL, PRODUCTION METHOD THEREFOR, AND LIGHT EMITTING DEVICE

摘要

This β-sialon fluorescent material satisfies 2.5 Y/X wherein X is the photoelectron intensity at a bonding energy of 103.5 eV in an X-ray photoelectron spectrum obtained using Al-Kα radiation as an excitation X-ray source, and Y is the photoelectron intensity at a bonding energy of 102.0 eV.