LIGHT-EMITTING DEVICE, VEHICULAR LIGHTING FIXTURE COMPRISING THE DEVICE, AND HEAD LAMP

摘要

Disclosed is a light-emitting device comprising a combination of a light source capable of emitting an excited light and a phosphor capable of absorbing the excited light to emit a light, wherein the phosphor is one mainly composed of an a-type sialon represented by the general formula: (Caa,Euß)(Si,Al)12(O,N)16 [wherein 1.5 < a+ß 2/g. The light-emitting device can produce a color that is hardly changed in accordance with the change in temperature even when used under high-temperature environments, can emit a light efficiently, and is suitable particularly for a vehicular lighting fixture such as a head lamp.