文献类型：期刊文献

英文题名：Effect of SnO₂ nanocrystals on the emission of EU³⁺ ions in silica matrix

作者：Liu, Lingyun; Zhang, Zhiqing; Kang, Shi-Zhao; Mu, Jin

机构：[1]E China Univ Sci & Technol, Dept Chem, Key Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2007

卷号：28

期号：5

起止页码：769

外文期刊名：JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000247620600013)】；

语种：英文

外文关键词：Eu3+ ions; SnO2 nanocrystals; silica xerogels; photoluminescence; energy transfer

摘要：Silica xerogels containing Eu3+ ions and SnO2 nanocrystals were prepared in the sol-gel process, and characterized by x-ray diffraction (XRD) and photoluminescence spectra. Under the excitation at 393 nm, characteristic emission of Eu3+ ions at 614 nm was enhanced with increasing amount of SnO2 nanocrystals. Moreover, when the Eu3+/SnO2 Co-doped samples were excited at 345 nm, corresponding to the sideband of SnO2 nanocrystals, the emission of Eu3+ ions at 614 nm was clearly observed, while no emission of Eu3+ ions for the Eu3+-doped sample. It may be ascribed to the energy transfer from SnO2 conduction band to Eu3+ conduction band. Further experimental results suggest that the energy transfer may be achieved through surface transition state.