Mechanism of upconversion emission enhancement in Y3Al5O12:Er3+/Li+ powders

被引：10
|
作者：
Yang Mingzhu [1 ,2 ]
Sui Yu [2 ,3 ]
Mu Haiwei [1 ]
Lu Shuchen [4 ]
Wang Xianjie [2 ]
Lu Tianquan [2 ]
机构：
[1] NE Petr Univ, Coll Elect Sci, Daqing 163000, Peoples R China
[2] Harbin Inst Technol, Dept Phys, CCMST, Harbin 150001, Peoples R China
[3] Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China
[4] Harbin Normal Univ, Dept Phys, Harbin 150001, Peoples R China
来源：
JOURNAL OF RARE EARTHS | 2011年 / 29卷 / 11期
基金：
中国国家自然科学基金;
关键词：
luminescence; optical materials and properties; sol-gel preparation; nanomaterials; rare earths; NANOCRYSTALS; NANOPHOSPHORS; LI+;
D O I：
10.1016/S1002-0721(10)60590-X
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Er3+ and Li+ codoped Y3Al5O12 (YAG) powders were prepared for a systematic investigation of their upconversion emissions. X-ray diffraction (XRD), upconversion emission spectra, pump power dependence, FT-IR spectra and decay time were studied to characterize the samples. With Li+ doping, the upconversion emission intensity of Er3+ doped YAG powders was obviously enhanced, accompanied with an increase in the ratio of green to red intensity. The enhancement of emission intensity could be attributed to two mechanisms: one was the distortion of local crystal field around Er3+, and the other was the decrease in the amount of CO32- and OH- groups. Our results revealed that the latter was the dominant mechanism of the upconversion intensity enhancement in the YAG:Er3+/Li+ powders.
引用
收藏
页码：1022 / 1025
页数：4
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