Enhancing NIR emission of Yb3+ by silver nanoclusters in oxyfluoride glass

被引：33
作者：
Ma, Ronghua [1 ]
Qian, Jiangyun [1 ]
Cui, Shuo [1 ]
Qiao, Xvsheng [1 ]
Wang, Feng [2 ,3 ]
Fan, Xianping [1 ]
机构：
[1] Zhejiang Univ, Dept Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China
[2] City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Hong Kong, Peoples R China
[3] City Univ Hong Kong, Shenzhen Res Inst, Shenzhen 518057, Peoples R China
来源：
JOURNAL OF LUMINESCENCE | 2014年 / 152卷
基金：
高等学校博士学科点专项科研基金;
关键词：
Luminescence; Ag clusters; Yb3+; Oxyfluoride glass; Energy transfer; AG NANOCLUSTERS; LUMINESCENCE; HOST; NANOPARTICLES; AGGLOMERATION; FLUORESCENCE; CERAMICS; KINETICS; CLUSTERS; ION;
D O I：
10.1016/j.jlumin.2013.10.036
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Oxyfluoride glass comprising Yb3+ ions and Ag nanoclusters was prepared via a melt-quenching method. The molecule-like Ag clusters (ML-Ag) in the glass displayed broad absorption and emission bands in the ultraviolet (UV) and visible spectral regions, respectively. The luminescence quantum yield (QY) was determined to be higher than 90%. We observed energy transfer from ML-Ag nanoclusters to Yb3+ ions as evidenced by time resolved luminescence spectra, which resulted in a four-fold enhancement in NIR emission of Yb3+. The luminescence enhancement effect described here would be applied to boost the efficiency of solar cells by converting high energy UV photons into NIR photons that better match the absorption of photovoltaic devices. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：222 / 225
页数：4
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