稀土学报(英文版)
稀土學報(英文版)
희토학보(영문판)
JOURNAL OF RARE EARTHS
2015年
5期
469-474
,共6页
赵凤阳%吕雁鹏%周广洲%朴贤卿%孙卓
趙鳳暘%呂雁鵬%週廣洲%樸賢卿%孫卓
조봉양%려안붕%주엄주%박현경%손탁
Eu2+%silicate phosphor%white LED%optical properties%rare earths
Orange-red emitting (Sr0.883–xBa0.1Lu0.0.17Eux)3(Si0.95Al0.05)O5 phosphors were synthesized by conventional solid-state reac-tion. The effect of NH4F flux on structural and luminescent properties of phosphors was investigated. Results suggested that the opti-mal content of NH4F flux was 3 wt.%and the optimal doping concentration of Eu2+was x=0.023 mol. The phosphors showed intense absorption in near-ultraviolet to blue region and exhibited orange-red emissions. The thermal stability of synthesized (Sr0.86Ba0.1Lu0.017Eu0.023)3(Si0.95Al0.05)O5 phosphor were examined and compared with commercial YAG:Ce3+ yellow phosphors. Combining an InGaN blue 460 nm chip and a white-emitting (Sr0.86Ba0.1Lu0.017Eu0.023)3(Si0.95Al0.05)O5 phosphor produced a white-light LED, demonstrating CIE chromaticity coordinates of (0.314, 0.329) and a color temperature of 5595 K. All results showed that this phosphor is a promising candidate as orange-red emitting phosphor for white light emitting diode (w-LED) application.