Luminescent material and light-emitting device

摘要

A light-emitting device characterised by comprising:
a light-emitting element which exhibits light having a wavelength ranging from 250 to 500nm; and
a luminescent material layer disposed on the light-emitting element;
wherein the luminescent material layer comprises the luminescent material which exhibits a light emission peak in a wavelength ranging from 490 to 580 nm when excited with light having a wavelength ranging from 250 to 500 nm and has a composition represented by the following general formula (2):
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ (M 1-x R x ) a2 AlSi b2 O c2 N d2 €ƒ€ƒ€ƒ€ƒ€ƒ(2)
(In the general formula (2), M is Sr, R is Eu and x, a2, b2, c2 and d2 satisfy the following relationships:
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