GROUP OF PHOSPHOR PARTICLES, AND LIGHT-EMITTING DEVICE USING THE SAME

摘要

Provided is a phosphor particle group of divalent europium-activated oxynitride green light emitting phosphor particles each of which is a ²-type SiAlON substantially represented by a general formula: Eu a Si b Al c O d N e , where 0.005‰¤a‰¤0.4, b+c=12, d+e=16, wherein 60 % or more of the phosphor particle group is composed of the phosphor particles (1) in which a value obtained by dividing a longer particle diameter by a shorter particle diameter is greater than 1.0 and not greater than 3.0. A high-efficiency and stable light emitting apparatus using a ²-type SiAlON, which includes a light converter using the phosphor particle group, and a phosphor particle group therefor are also provided.