Up-conversion fluorescence characteristics and mechanism of Er3+-doped TiO2 thin films

被引：26
作者：
Mao, Xinguang [1 ]
Yan, Bingxi [1 ]
Wang, Jun [1 ]
Shen, Jie [1 ]
机构：
[1] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China
来源：
VACUUM | 2014年 / 102卷
关键词：
Er3+-doped; TiO2 thin film; RF magnetron sputtering; Up-conversion fluorescence; SENSITIZED SOLAR-CELLS; ENHANCED PERFORMANCE; GEL METHOD; LUMINESCENCE; ER3+; EMISSION; GLASSES; GREEN; NANOCRYSTALS; BLUE;
D O I：
10.1016/j.vacuum.2013.10.026
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Er3+-doped TiO2 thin films were prepared by RF magnetron sputtering. The effects of Er3+ concentration and annealing conditions upon up-conversion fluorescence were studied. The result shows that 490 nm green emission and 670 nm red emission can be obtained from Er3+-doped TiO2 thin films excited by 980 nm lasers. TiO2 thin films with 1.0 mol% Er3+ manifested the best up-conversion property when the annealing temperature reached 900 degrees C. Under such conditions, we observed intense 490 nm green emission that has not been observed in powder or sol-gel samples and the mechanism of up-conversion fluorescence were studied. We also confirmed the up-conversion properties are closely related to the formation of Er2Ti2O7 in thin films, which is proved to reduce state densities of phonons and therefore inhibit nonradiative transition in an up-conversion process. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：38 / 42
页数：5
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