Partition, luminescence and energy transfer of Er3+/Yb3+ ions in oxyfluoride glass ceramic containing CaF2 nano-crystals

被引:62
作者
Chen, Daqin [1 ]
Wang, Yuansheng [1 ]
Ma, En [1 ]
Yu, Yunlong [1 ]
Liu, Feng [1 ]
机构
[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fujian 350002, Peoples R China
基金
中国国家自然科学基金;
关键词
oxyfluoride glass ceramics; CaF2; nano-crystals; energy transfer; luminescence; up-conversion;
D O I
10.1016/j.optmat.2006.09.002
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A complete spectroscopic investigation of energy transfer processes in oxyfluoride glass ceramics containing CaF2 nano-crystals doped with various amounts of Er3+ and Yb3+ was reported. An enhancement of the 1.53 mu m emission and infrared to visible up-conversion fluorescence was confirmed experimentally due to efficient non-radiative energy transfer from Yb3+ to Er3+ ions concentrated in CaF2 nano-crystals. The efficiency of Yb3+ to Er3+ energy transfer in excess of 85% was obtained for 0.5 mol% Er3+/2.0 mol% Yb3+ co-doped glass ceramic. Using rate equation formulism, the coefficient of Yb3+ to Er 3+ energy transfer was determined to be about 3.5 times higher than that of Er3+ to Yb3+ energy back transfer, which is sufficient to provide high I-4(11/2) population of Er3+ to improve the fluorescence of the co-doped glass ceramics. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:1693 / 1699
页数:7
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