Patent ID: 7998364
Filing Date: 2011-08-16
Classification: C09K,Y02B

Abstract:
1. A phosphor, particularly a phosphor used in a light-emitting device including LED, wherein it comprises silicate and activator ion, and its essential chemical composition is expressed by the formula: wherein M is an element or a combination of elements selected from the group consisting of Sr, Ca, Ba and Zn; M′ is an element or a combination of elements selected from the group consisting of Mg, Cd and Be; R is one or two of B Ln is an element or a combination of elements selected from the group consisting of Nd, Dy, Ho, Tm, La, Ce, Er, Pr, Bi, Sm, Sn, Y, Lu, Ga, Sb, Tb, Mn and Pb; Lv is an element or a combination of elements selected from the group consisting of Cl, F, Br, I and S; Lm is an element or a combination of elements selected from the group consisting of Li, Na and K; and a, b, c, x, y, z and δ are molar coefficients, wherein 0.5≦a≦5.0, 0≦b≦3.0, 0<c≦0.5, 0.001≦x≦0.2, 0<y≦0.5, 0<z<0.5; 0<δ<0.2, wherein 1<(a+b)≦6, and (a+b)≠2; the material is capable of being excited by a light-emitting element as a radiation light source having an emission spectrum between 240 and 510 nm which is from ultraviolet to green light region, absorbing at least a portion of emission light of the radiation light source, and emitting an emission spectrum between 420-700 nm which has at least one peak emission wavelength in the range of about 430-630 nm, the luminescence color is blue, blue-green, green, yellow-green, yellow, yellow-red, red, or white.