| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: red light emitting material has the formula M1-yA1+xS4-xN7-x-2yOx+2y:RE, where M is selected from a group comprising Ba, Sr, Ca, Mg or mixtures thereof, A is selected from a group comprising Al, Ga, B or mixtures thereof, RE is selected from a group comprising rare-earth metals: Y, La, Sc, Eu, Ce or mixtures thereof, xëÑ0 and ëñ1, yëÑ0 and ëñ0.2. Doping level ëÑ0.5% and ëñ10%; photostability ëÑ80% and ëñ90%. A light-emitting device contains said luminescent material in form of powder or ceramic material. The powder has d50ëÑ5 and ëñ15 mcm. The ceramic material has ëÑ90% of theoretical density. ^ EFFECT: luminescent material has high quantum efficiency, luminous efficacy and colour rendition. ^ 10 cl, 6 dwg, 4 tbl, 2 ex |
