Patent ID: 8652359
Filing Date: 2014-02-18
Classification: C09K,H01L

Abstract:
1. A light-emitting device comprising: a light-emitting element to emit light, and a fluorescent substance (R) giving off luminescence under excitation by light of said light emitting element, wherein the fluorescent substance R is represented by the following formula (1): in which M is an element selected from the group consisting of IA group elements, IIA group elements, IIIA group elements, IIIB group elements, rare earth elements and IVA group elements; EC is an element selected from the group consisting of Eu, Ce, Mn, Tb, Yb, Dy, Sm, Tm, Pr, Nd, Pm, Ho, Er, Cr, Sn, Cu, Zn, As, Ag, Cd, Sb, Au, Hg, Tl, Pb, Bi and Fe; M x, a, b, c and d are numbers satisfying the conditions of 0<x<0.2, 0.63<a<0.80, 2.1<b<2.63, 0≦c≦0.24 and 4≦d≦5, respectively; and