Green and red up-conversion emissions of Er3+-Yb3+Co-doped TiO2 nanocrystals prepared by sol-gel method
Green and red up-conversion emissions of Er3+-Yb3+Co-doped TiO2 nanocrystals prepared by sol-gel method
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溶胶-凝胶法制备Er3-Yb3共掺杂TiO2纳米晶的绿光和红光上转换发射
DOI：
10.1016/j.jlumin.2007.11.097
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发表时间：
2008-07-01
影响因子：
3.6
通讯作者：
Zeng, Qinghui
中科院分区：
文献类型：
--
作者：
Shang, Qingkun;Yu, Hui;Zeng, Qinghui
本文报道了Er 3 +-Yb 3+共掺杂TiO 2纳米晶的绿色和红色上转换发光。采用X射线衍射（XRD）、透射电子显微镜（TEM）、紫外-可见-近红外（UV-vis-NIR）吸收光谱和光致发光（PL）光谱等手段对Er 3 +-Yb 3+共掺杂TiO 2纳米晶的物相结构、粒径大小和光学性能进行了表征。Er 3 +-Yb 3+共掺杂的TiO 2纳米晶在520-570 nm（H-2（11/2），S-4（3/2）-> I-4（15/2））和640-690 nm（F-4（9/2）-> I-4（15/2））范围内观察到绿色和红色上转换发射。详细讨论了Er 3+在TiO 2纳米晶中的可见上转换发光机理和上转换发光的温度依赖性。(c)2008 Elsevier B. V.保留所有权利。
In this paper, green and red up-conversion emissions of Er3+-Yb3+ co-doped TiO2 nanocrystals were reported. The phase structure, particle size and optical properties of Er3+-Yb3+ co-doped TiO2 nanocrystals samples were characterized by using X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis-NIR absorption spectra and photoluminescence (PL) spectra. Green and red up-conversion emissions in the range of 520-570 nm (H-2(11/2), S-4(3/2) -> I-4(15/2)) and 640-690 nm (F-4(9/2) -> I-4(15/2)) were observed for the Er3+-Yb3+ co-doped TiO2 nanocrystals. The visible up-conversion mechanism and temperature dependence of up-conversion emission for Er3+ in TiO2 nanocrystals were discussed in detail. (c) 2008 Elsevier B.V. All rights reserved.