Photoluminescence properties and pump-saturation effect of Er3+/Yb3+ co-doped Y2Ti2O7 nanocrystals
Photoluminescence properties and pump-saturation effect of Er3+/Yb3+ co-doped Y2Ti2O7 nanocrystals
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Er3/Yb3共掺杂Y2Ti2O7纳米晶的光致发光特性及泵浦饱和效应
DOI：
10.1016/j.jlumin.2011.11.016
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发表时间：
2012-03
影响因子：
3.6
通讯作者：
Liu, Jiadong
中科院分区：
文献类型：
--
作者：
Zhang, Gong;Song, Feng;Ming, Chengguo;Yu, Yin;Zhang, Chao;Zhao, Hongyan;Wang, Qingru;Liu, Jiadong
The Er3+/Yb3+co-doped Y2Ti2O7phosphors were synthesized by the sol–gel method. XRD, TEM, and photoluminescence spectra of samples were measured and studied. The results demonstrate that the Y2Ti2O7would transform from the amorphous to nanocrystalline at about 750°C. The mechanism of both upconversion and near infrared (NIR) photoluminescence and their changes with annealing temperature were analyzed. What is more, the pump-saturation effect of NIR emission and the anomalous slopes of the fitted straight line in the double-logarithmic plots for upconversion emissions were found in the nanocrystalline samples, which can be ascribed to domination of upconversion over linear decay for the4I11/2and4I13/2state and the saturation of4I13/2state in Er3+ions largely owing to the energy back-transfer process. They are induced by high pump power and Yb3+ions concentration.
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影响因子：
3.9
作者：
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通讯作者：
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影响因子：
3.6
作者：
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