| abstract |
Disclosed are oxynitride phosphor compositions having the formula (RE 1-x Ce x ) 3 Al a-y-z-w Si y Ga z Sc w O 12-y N y , where RE is at least one of Lu, Gd, Y, and Tb, 0.001≦x≦0.10, 0≦w≦2, 0.001≦y≦0.50, 0≦z≦4.999, and 4.5≦a≦5.0. When combined with radiation from a blue or UV LED, these phosphors can provide light sources with good color quality having high CRI over a large color temperature range. Also disclosed are blends of the above oxynitride phosphors and additional phosphors. |