| abstract |
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): n (M 1-x R x ) a1 AlSi b1 O c1 N d1 (1) n(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: n0<x¤1, 0.6<a1<0.95, 2<b1<3.9, 0.25<c1<0.45, 4<d1<5.7). |