Patent ID: 8926863
Filing Date: 2015-01-06
Classification: C09K,H01L

Abstract:
1. An oxynitride phosphor comprising aluminum, silicon, oxygen, nitrogen, and a metal element M selected from the group consisting of IA group elements, IIA group elements, IIIA group elements other than aluminum, IIIB group elements, rare earth elements and IVA group elements other than silicon, provided that said metal element M is partly replaced with an emission center element R 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; wherein the oxynitride phosphor has a paramagnetic defect density detected at g=2.002 in an electron spin resonance measurement of less than 2×10 wherein the oxynitride phosphor is represented by the following formula (3): wherein M′ is an element selected from the group consisting of IIA group metals and rare earth metals; R is the emission center element R and x3 and p are numbers satisfying the conditions of 0<x3≦1 and 0<p≦10, respectively; has an AlN polytypoid structure; and emits luminescence having a peak in a wavelength range of from 400 to 700 nm when excited by electron energy or light in a wavelength range of from 250 to 500 nm.