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...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.展开更多
基金Project supported by National Natural Science Foundation of China(51102095)Research Fund for the Doctoral Program of Higher Education of China(20110076120023)
文摘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.
