| Up-conversion of Er3＋/yb3＋ co-doped transparent glass-ceramics containing Ba2LaF7 nanocrystals |
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| 作者姓名： | 胡金民 周大成 王荣飞 陈明厚 焦清 余雪 邱建备 |
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| 作者单位： | [1]School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China [2]Department of Research Admini- stration and International Relations, Tuyhoa Industrial College, Phuyen 620900, Vietnam |
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| 基金项目： | Project supported by National Natural Science Foundation of China （51272097, 61265004, 51002068）, 973 Program （2011CB211708）, Society Development Foundation of Yurman Province （2009CC009）, Natural Science Foundation of Yunnan Province （2010ZC038）, Postdoctoral Science Foundation of China （20110491759）, Education Department Foundation of Yuunan Province （2011 Y348） and Foundation of Yunnan Province （2012FD009） |
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| 摘 要： | The up-conversion of Er3+/Yb3+co-doped transparent glass-ceramics 50SiO2-10AlF3-5TiO2-30BaF2-4LaF3-0.5ErF3-0.5YbF3 containing Ba2 LaF7 nanocrystals under the changing of heat treatment temperature and time were investigated.The Ba2 LaF7 nanocrystals precipitated from the glass matrix was confirmed by X-ray diffraction(XRD).The structural investigation carried out by XRD and transmission electron microscopy(TEM) evidenced the formation of cubic Ba2 LaF7 nanocrystals with crystal size of about 14 nm.Comparing with the samples before heat treatment,the high efficiency up-conversion emission of Er3+/Yb3+co-doped samples was observed in the glass-ceramics under 980 nm laser diode excitation.The increase in red emission intensity bands was stronger than the green bands when the crystal size increased.The mechanism for the up-conversion process in the glass-ceramics and the reasons for the increase of Er3+/Yb3+co-doped up-conversion intensity after heat treatment were discussed.
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| 关 键 词： | up-conversion Ba2 LaF7 nanocrystals glass-ceramics rare earths |
| 收稿时间： | 2013-01-28 |
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