| Intense up-conversion emissions of yb3＋/Dy3＋ co-doped A12O3 nanopowders prepared by non-aqueous sol-gel method＊ |
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| 作者姓名： | 李成仁 李淑凤 董斌 孙景昌 卜晓峰 范旭楠 |
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| 作者单位： | [1]College of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, China [2]School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China [3]School of Physics and Materials Engineering, Dalian Nationalities University, Dalian 116600, China |
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| 基金项目： | 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）. |
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| 摘 要： | Yb 3+ /Dy 3+ 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 a 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 to4G9/2 → 6H13/2,4G9/2→6H11/2 ,4I15/2 →6H13/2 , and 4F9/2 → 6H11/2 transitions of Dy 3+ , 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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| 关 键 词： | Yb3+ /Dy3+ co-doped Al2O3 nanopowders non-aqueous sol-gel method photo- luminescence spectra up-conversion emission |
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