Intense up-conversion emissions of yb3＋/Dy3＋ co-doped A12O3 nanopowders prepared by non-aqueous sol-gel method＊  

作　　者：李成仁 李淑凤 董斌 孙景昌 卜晓峰 范旭楠 

机构地区：[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

出　　处：《Chinese Physics B》2012年第9期505-508,共4页中国物理B（英文版）

基　　金：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）.

摘　　要：yb3＋/Dy3＋ co-doped A1203 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 to 4C9/2→ 6H13/2, 4C9/2→ 6Hll/2, 4115/2 → 6H13/2, and 4F9/2 →6Hll/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.yb3＋/Dy3＋ co-doped A1203 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 to 4C9/2→ 6H13/2, 4C9/2→ 6Hll/2, 4115/2 → 6H13/2, and 4F9/2 →6Hll/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.

关 键 词：yb3＋/Dy3＋ co-doped A1203 nanopowders non-aqueous sol-gel method photo- lumi-nescence spectra up-conversion emission 

分 类 号：O482.3[理学—固体物理]