Patent ID: 8017035

Claim:
A white LED comprising: a radiation source configured to emit radiation having a wavelength ranging from about 410 to 500 nm; a green phosphor having the formula (Sr 1−x−y Ba x M y ) 2 SiO 4 :Eu 2+ F,Cl,Br,I,S,N,B, where M is at least one of an element selected from the group consisting of Ca, Mg, Zn, and Cd; where F, Cl, Br, I, S, N, B are used in any combination having a total molar dopant level in the range 0.0001-0.2; and where 0.3≦x≦1; 0≦y≦0.5 when M is Ca; 0≦y≦0.1 when M is Mg; and 0≦y≦0.5 when M is selected from the group consisting of Zn and Cd, the green phosphor configured to absorb at least a portion of the radiation from the radiation source and emit light with peak intensity in a wavelength ranging from about 500 to 540 nm; a red phosphor selected from the group consisting of CaS:Eu 2+ ; SrS:Eu 2+ ; MgO*MgF*GeO:Mn 4+ ; a nitridosilicate, an aluminonitridosilicate, an oxynitridosilicate, and an oxynitridoaluminosilicate; M x Si y N z :Eu 2+ where M is selected from the group consisting of Ca, Sr, Ba, and Zn; and Z=⅔x+ 4/3y; M 2 Si 5 N 8 :Eu 2+ , where M is Ca, Sr, and Ba; CaSiN 2 :Eu 2+ ; CaAlSiN 3 :Eu 2+ ; (Ca 1−x−y−z Sr x Ba y Mg z ) 1−n (Al 1−a+b B a )Si 1−b N 3−b O b :RE n , where 0≦x≦1, 0≦y≦1, 0≦z≦1, 0≦a≦1, 0<b≦1, 0.002≦n≦0.2, and RE is selected from the group consisting of Eu 2+ and Ce 3+ ; and wherein the red phosphor is configured to absorb at least a portion of the radiation from the radiation source and emit light with peak intensity in a wavelength ranging from about 590 to 690 nm.