Orange-red emitting Eu2+-activated (Sr0.883Ba0.1Lu0.0.17)3(Si0.95Al0.05)O5 phosphor: structure, photoluminescence, and application in white LEDs

被引：6
|
作者：
Zhao Fengyang [1 ]
Lu Yanpeng [1 ]
Zhou Guangzhou [1 ]
Piao Xianqing [1 ]
Sun Zhuo [1 ]
机构：
[1] E China Normal Univ, Dept Phys, Engn Res Ctr Nanophoton & Adv Instrument, Minist Educ, Shanghai 200062, Peoples R China
来源：
JOURNAL OF RARE EARTHS | 2015年 / 33卷 / 05期
基金：
高等学校博士学科点专项科研基金; 中国国家自然科学基金;
关键词：
Eu2+; silicate phosphor; white LED; optical properties; rare earths; ENHANCED PHOTOLUMINESCENCE; LUMINESCENCE PROPERTIES; DIODE; EU2+; DEGRADATION;
D O I：
10.1016/S1002-0721(14)60442-7
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
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.
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收藏
页码：469 / 474
页数：6
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