PHOSPHOR, PHOSPHOR PRODUCTION METHOD, AND LIGHT-EMITTING DEVICE

摘要

The present invention provides a phosphor comprising a europium-activated sialon crystal having a basic composition represented by a formula: (Sr 1-x , Eu x ) ± Si ² Al ³ O ´ N É (1) (wherein x is 0 < x < 1, ± is 0 < ± < 4 and ², ³, ´ and É are numbers such that converted numerical values when ± is 3 satisfy 9 < ² ‰¤ 15, 1 ‰¤ ³ ‰¤ 5, 0.5 ‰¤ ´ ‰¤ 3 and 10 ‰¤ É ‰¤ 30), wherein the phosphor is composed of particles having a sphericity of 0.65 or more and emits green light by being excited by ultraviolet light, violet light or blue light.