Effect of SnO2 Nanocrystals on the Emission of Eu3+ Ions in Silica Matrix |
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Authors: | Lingyun Liu Zhiqing Zhang Shi‐Zhao Kang |
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Affiliation: | Department of Chemistry, Key Laboratory for Ultrafine Materials of Ministry of Education , East China University of Science and Technology , Shanghai, China |
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Abstract: | 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. |
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Keywords: | Eu3+ ions SnO2 nanocrystals silica xerogels photoluminescence energy transfer |
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