Patent ID: 8203259

Claim:
A phosphor, comprising a constituent having the formula Ca p Sr q M m -A a -B b —O t —N n :Eu r , wherein M selected from the group consisting of beryllium and zinc, A selected from the group consisting of aluminum, gallium, indium, scandium, yttrium, lanthanum, gadolinium and lutetium, B selected from the group consisting of silicon, germanium, tin, titanium, zirconium and hafnium, 0<p<1, 0<q<1, 0≦m<1, 0≦t≦0.3, 0.00001≦r≦0.1, a=1, 0.8≦b≦1.2, and 2.7≦n≦3.1, and the phosphor contains 20˜1500 ppm of magnesium and 40˜5000 ppm of barium.