Synthesis of Eu[sup 2+]-Activated MYSi[sub 4]N[sub 7] (M=Ca,Sr,Ba) and SrYSi[sub 4−x]Al[sub x]N[sub 7−x]O[sub x] (x=0–1) Green Phosphors by Carbothermal Reduction and Nitridation

Rare-earth-activated nitride phosphors, and , were synthesized by carbothermal reduction and nitridation. The phosphors show green photoluminescence under excitation with near-UV light and have a potential use for color conversion in white light-emitting diodes. The characterization of the structure, morphology, luminescence, and thermal quenching of the green phosphors is presented.