Patent ID: 8896006

Claim:
A red-emitting luminescent material that belongs to the class of nitridosilicates and is doped with at least one activator D, wherein the material is a modified D-doped alkaline earth nitridosilicate M 2 Si 5 N 8 , where M=one or more elements belonging to the group Sr, Ca, Ba, with the nitridosilicate having been stabilized by an oxidic or oxinitridic phase, wherein the stabilized luminescent material exhibits stoichiometry (Sr 1+y M 1−y Si 5 N 8 :D)*ax(SiO 2 )*bx(M′ 3 N 2 ), a≧0, b≧0, a+b>0, x=1/(1-a-b), y>0, and M′ can be an element or combination of elements, including those of M.