Patent ID: 8771547

Claim:
A composition comprising a phosphor having a formula selected from the group consisting of: M(II) 7−y M(I) y M(III) 12−x−y−z Si x+y+z O 25−x±δ/2 N x±δ−z C z :A, wherein 0<x<12, 0≦y<x, 0<z<x, 0<x+y+z≦12, z<x+δ, and 0<δ≦3; (a) M(II) 7−y M(I) y M(III) 12−x−y−z Si x+y+z O 25−x±δ/2 N x±δ−z C 25δ/2 :A, wherein 0<x<12, 0≦y<x, 0<z<x, 0<x+y+z≦12, z<x+δ, and 0<δ≦3; (b) M(II) 7−y M(I) y M(III) 12−x−y−z Si x+y+z O 25−x−y/2±3δ/2 N x±δ−z C z D v :A, wherein 0<x<12, 0≦y<1, 0<z<x, z<x+δ, 0<δ≦3, 0≦v<1, and 0<x+y+z≦12; (c) and M(II) 7−y M(I) y M(III) 12−x−y−z Si x+y+z O 25−x−v/2±δ/2 N x±δ−z C z±δ/2 D v :A, wherein 0<x<12, 0≦y<1, 0<z<x, z<x+δ, 0<δ≦3, 0≦v<1, and 0<x+y+z≦12; (d) wherein: M(II) comprises at least one divalent cation; M(I) comprises at least one monovalent cation; M(III) comprises at least one trivalent cation; D comprises at least one monovalent anion; and A comprises a luminescence activator doped in the crystal structure.