Patent ID: 8043529
Filing Date: 2011-10-25
Classification: C01B,C01G,C01P,C09K,H01L,Y02B

Abstract:
1. A white light-emitting device comprising; a light source; an alkaline earth metal silicate-based phosphor comprising a compound represented by Formula 1 below: wherein, M1 is one selected from the group consisting of Ba, Ca, and Sr; M2 is at least one selected from Si or Ge; A and B are each independently one selected from the group consisting of Eu, Ce, Mn, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Bi, Sn, and Sb; Z is at least one selected from the group consisting of a monovalent or divalent element, H, and N; and 0<x<1, 0≦y≦1, 6.3<a<7.7, 0.9<b<1.1, 3.6<c<4.4, 14.4<d<17.6, 14.4<d+e<17.6, and 0≦e≦0.18; and a red phosphor having an emission peak wavelength of 590 to 690 nm, wherein the light source is a light emitting device having an emission peak wavelength of 390 to 460 nm, and the alkaline earth metal silicate-based phosphor has an emission peak wavelength of 500 to 550 nm.