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Structure and photoluminescence properties of Er3+-doped TiO2–SiO2 powders prepared by sol–gel method |
Zhao Jian-Guo(赵建果)a)†,Zhang Wei-Ying(张伟英)a),Ma Zi-Wei(马紫微)b), Xie Er-Qing(谢二庆)b),Zhao A-Ke(赵阿可)a),and Liu Zhao-Jun(刘照军)a) |
a College of Physics and Electronic Information, Luoyang Normal College, Luoyang 471022, China; b School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China |
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Abstract Er3+-doped TiO2—SiO2 powders are prepared by the sol—gel method, and they are characterized by high resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD) spectra, and Raman spectra of the samples. It is shown that the TiO2 nanocrystals are surrounded by an SiO2 glass matrix. The photoluminescence (PL) spectra are recorded at room temperature. A strong green luminescence and less intense red emission are observed in the samples when they are excited at 325 nm. The intensity of the emission, which is related to the defect states, is strongest at the annealing temperature of 800 °C. The PL intensity of Er3+ ions increases with increasing Ti/Si ratio due to energy transfer between nano-TiO2 particles and Er3+ ions.
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Received: 11 March 2011
Revised: 19 April 2011
Accepted manuscript online:
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PACS:
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77.84.Lf
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(Composite materials)
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78.55.Hx
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(Other solid inorganic materials)
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78.67.-n
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(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
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Fund: Project supported by the Key Science and Technology Program of Henan Province of China (Grant Nos. 102102210448 and 102102210452) and the Scientific Research Fundation of the Education Department of Henan Province, China (Grant No. 2010A140011). |
Cite this article:
Zhao Jian-Guo(赵建果),Zhang Wei-Ying(张伟英),Ma Zi-Wei(马紫微), Xie Er-Qing(谢二庆),Zhao A-Ke(赵阿可),and Liu Zhao-Jun(刘照军) Structure and photoluminescence properties of Er3+-doped TiO2–SiO2 powders prepared by sol–gel method 2011 Chin. Phys. B 20 087701
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