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Proceedings Article

Temperature dependence of photoluminescence, Raman scattering, and transmittance spectra of anatase Ti1-xFexO2 nanocrystalline films

[+] Author Affiliations
X. G. Chen, W. W. Li, J. Z. Zhang, Y. W. Li, Z. G. Hu, J. H. Chu

East China Normal Univ. (China)

Proc. SPIE 7995, Seventh International Conference on Thin Film Physics and Applications, 799511 (February 17, 2011); doi:10.1117/12.888287
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From Conference Volume 7995

  • Seventh International Conference on Thin Film Physics and Applications
  • Junhao Chu; Zhanshan Wang
  • Shanghai, China | September 24, 2010

abstract

Anatase Ti1-xFexO2 (x=0, 1%, 2%) nanocrystalline films were prepared on quartz substrates by a facile nonhydrolytic sol-gel route. The structure and optical properties have been studied by X-ray diffraction (XRD), Raman scattering, transmittance spectra and temperature dependent photoluminescence (PL). The B 1g, E g and (A 1g+B 1g) modes of anatase phase TiO2 can be observed in Raman spectra. Dielectric functions have been extracted by fitting the transmittance spectra in the photon energy range of 0.5-6.5 eV with Adachi's model. The pure TiO2 film displays a strong broadening visible luminescence band; however, Fe-doped samples exhibit a very weak luminescence due to the increase of oxygen vacancy concentration in TiO2. With the temperature increases, the PL intensity decreases monotonously and there are five emission peaks for the pure sample in low temperatures, which could be attributed to oxygen vacancies, surface states and F+ center.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

X. G. Chen ; W. W. Li ; J. Z. Zhang ; Y. W. Li ; Z. G. Hu, et al.
"Temperature dependence of photoluminescence, Raman scattering, and transmittance spectra of anatase Ti1-xFexO2 nanocrystalline films", Proc. SPIE 7995, Seventh International Conference on Thin Film Physics and Applications, 799511 (February 17, 2011); doi:10.1117/12.888287; http://dx.doi.org/10.1117/12.888287


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