Patent ID: 8441026

Claim:
Red emitting material essentially having a main phase of the composition a (M II N 2/3 )* b (M III N)* c (M IV N 4/3 )* d 1 CeO 3/2 *d 2 EuO* x M IV O 2 *y M III O 3/2 wherein M II is an alkaline earth metal chosen of the group of Ca, Mg, Sr and Ba or mixtures thereof, M IV is selected out of the group comprising Si, Ge, C, Zr, Hf or mixtures thereof, and M III is selected out of the group comprising Al, B, Sc, Ga, and Lu or mixtures thereof, with 0.95 *c≦a+d 1 +d 2 ≦1.2 *b and a+d 1 +d 2 ≧c+x, ( b+y ):( c+x )≧1, ( b+y )≦1+10 *d 1 , b≧ 5 *y, c≧ 10 *x, 0.001≦ d 1 ≦0.01, 0.001≦ d 2 ≦0.005, 0≦( d 1 +d 2 +x+y )≦0.4.