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Temperature Dependence of the Fluorescence Emission Intensity of Eu/TiO2 Nanocrystals |
| ZENG Qing-Guang 1,2;DING Ze-Jun1;JU Xin3; WANG Yi2;SHENG Ye-Qing2 |
| 1Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei 2300262Department of Mathematics and Physics, Wu Yi University, Jiangmen 5290203Department of Physics, Nanjing University, Nanjing 210093 |
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| Cite this article: |
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ZENG Qing-Guang, DING Ze-Jun, JU Xin et al 2007 Chin. Phys. Lett. 24 1368-1371 |
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Abstract The samples of europium ions doped titanium dioxide (Eu3+/TiO2) nanocrystals are synthesized by a modified sol-gel method with hydrothermal treatment. The x-ray diffraction and scanning electron microscopy are used to characterize the sample. The temperature-dependent fluorescence emission effect of Eu3+-doped samples is investigated. It is found that under the excitation of 514.5nm light, the emission intensity of Eu 3+ reaches a maximum value at 450K among various Eu 3+ dopant concentrations in
Eu3+/TiO2 nanocrystals. The variation of the emission intensity may be attributed to the photon-assist absorption and the temperature-quenching effect.
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| Keywords:
78.55.-m
61.10.-i
67.37.Hk
91.60.Ki
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Received: 05 February 2007
Published: 23 April 2007
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