Luminescent material and light-emitting device

摘要

A luminescent material which is featured in that it exhibits a light emission peak in a wavelength ranging from 580 to 700 nm when excited with light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (1):
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ (M 1-x R x ) a1 AlSi b1 O c1 N d1 €ƒ€ƒ€ƒ€ƒ€ƒ(1)
(In the general formula (1), M is at least one metallic element excluding Si and Al; R is a luminescence center element; and x, a1, b1, c1 and d1 satisfy following relationships:
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