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Intense up-conversion emissions of Yb3+/Dy3+ co-doped Al2O3 nanopowders prepared by non-aqueous sol–gel method |
| Li Cheng-Ren (李成仁)a, Li Shu-Feng (李淑凤)b, Dong Bin (董斌)c, Sun Jing-Chang (孙景昌)a, Bo Xiao-Feng (卜晓峰)a, Fan Xu-Nan (范旭楠)a |
a College of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, China;
b School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China;
c School of Physics and Materials Engineering, Dalian Nationalities University, Dalian 116600, China |
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Abstract Yb3+/Dy3+ co-doped Al2O3 nanopowders have been prepared by the non-aqueous sol-gel method and their up- conversion photoluminescence spectra are measured under excitation by 980-nm semiconductor laser. The results show that there are comparatively abundant spectra of up-conversion emissions centered at 378, 408, 527 and 543, and 663 nm, corresponding to 4G9/2 → 6H13/2, 4G9/2 → 6H11/2, 4I15/2 → 6H13/2, and 4F9/2 → 6H11/2 transitions of Dy3+, respectively. Two-photon and three-photon processes are involved in ultraviolet, violet, green, and red up-conversion emissions. The energy transition between Yb3+ and Dy3+ is discussed.
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Received: 07 January 2012
Revised: 06 April 2012
Accepted manuscript online:
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PACS:
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78.55.Qr
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(Amorphous materials; glasses and other disordered solids)
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38.80.Wr
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11004092) and the Scientific Research Fund of Education Department of Liaoning Province, China (Grant No. 2009A417). |
Corresponding Authors:
Li Cheng-Ren
E-mail: lshdg@sina.com.cn
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Cite this article:
Li Cheng-Ren (李成仁), Li Shu-Feng (李淑凤), Dong Bin (董斌), Sun Jing-Chang (孙景昌), Bo Xiao-Feng (卜晓峰), Fan Xu-Nan (范旭楠) Intense up-conversion emissions of Yb3+/Dy3+ co-doped Al2O3 nanopowders prepared by non-aqueous sol–gel method 2012 Chin. Phys. B 21 097803
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