Orange-red emitting Eu2 -activated (Sr0.883Ba0.1Lu0.0.17)(3)(Si0.95Al0.05)O-5 phosphor: structure, photoluminescence, and application in white LEDs

作者：Zhao Fengyang; Lu Yanpeng; Zhou Guangzhou; Piao Xianqing^*; Sun Zhuo

来源：Journal of Rare Earths, 2015, 33(5): 469-474.

DOI：10.1016/S1002-0721(14)60442-7

• Eu2
• silicate phosphor
• white LED
• optical properties
• rare earths

Orange-red emitting (Sr0.883-xBa0.1Lu0.0.17Eux)(3)(Si0.95Al0.05)O-5 phosphors were synthesized by conventional solid-state reaction. The effect of NH4F flux on structural and luminescent properties of phosphors was investigated. Results suggested that the optimal 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)O-5 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)O-5)(3)(Si0.95Al0.05)O-5 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.

• 出版日期2015-5
• 单位华东师范大学