Journal of Materials Science

, Volume 43, Issue 1, pp 345–349 | Cite as

Photoluminescence of Eu3+ ion in SnO2 obtained by sol–gel

  • Evandro A. Morais
  • Luis V. A. Scalvi
  • Américo Tabata
  • José B. B. De Oliveira
  • Sidney J. L. Ribeiro


Photoluminescence data of Eu-doped SnO2 xerogels are presented, yielding information on the symmetry of Eu3+ luminescent centers, which can be related to their location in the matrix: at lattice sites, substituting to Sn4+, or segregated at particles surface. Influence of doping concentration and/or particle size on the photoluminescence spectra obtained by energy transfer from the matrix to Eu3+ sites is investigated. Results show that a better efficiency in the energy transfer processes is obtained for high symmetry Eu3+ sites and low doping levels. Emission intensity from 5D07F1 transition increases as the temperature is raised from 10 to 240 K, under excitation at 266 nm laser line, because in this transition the multiphonon emission becomes significant only above 240 K. As an extension of this result, we predict high effectiveness for room temperature operation of Eu-based optical communication devices. X-ray diffraction data show that the impurity excess inhibits particle growth, which may influence the asymmetry ratio of luminescence spectra.


SnO2 Laser Line Energy Transfer Process Asymmetry Ratio SnO2 Lattice 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



Authors acknowledge CAPES, CNPq and FAPESP for financial support.


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Evandro A. Morais
    • 1
    • 2
  • Luis V. A. Scalvi
    • 1
    • 2
  • Américo Tabata
    • 1
    • 2
  • José B. B. De Oliveira
    • 1
    • 2
  • Sidney J. L. Ribeiro
    • 3
  1. 1.Depto. Fisica - FCUNESPBauruBrazil
  2. 2.Programa de Pós-Graduação em Ciência e Tecnologia de MateriaisUNESPSao PauloBrazil
  3. 3.Inst. QuímicaUNESPAraraquaraBrazil

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