Journal of Sol-Gel Science and Technology

, Volume 53, Issue 3, pp 509–514

Sol–gel preparation and white up-conversion luminescence in rare-earth doped PbF2 nanocrystals dissolved in silica glass

  • J. del-Castillo
  • A. C. Yanes
  • J. Méndez-Ramos
  • V. K. Tikhomirov
  • V. V. Moshchalkov
  • V. D. Rodríguez
Original Paper

DOI: 10.1007/s10971-009-2124-x

Cite this article as:
del-Castillo, J., Yanes, A.C., Méndez-Ramos, J. et al. J Sol-Gel Sci Technol (2010) 53: 509. doi:10.1007/s10971-009-2124-x

Abstract

89.5(SiO2)10(PbF2)0.5(REF3) silicate glasses have been prepared using room temperature sol–gel processing of Si(OCH2CH3)4, Pb(CH3COO)2·3H2O, RE(CH3COO)3·nH2O and trifluoroacetic acid as a fluorinating agent, where RE stands for rare-earth ions, such as Yb3+, Er3+, Ho3+, Tm3+, or combinations of those ions. On heat treatment of these glasses at about 300–400 °C, the rare-earth doped spherical PbF2 nanocrystals precipitate within SiO2 glass matrix providing transparent nano-structured glassceramics, while the diameter of the nanocrystals can be set in the range from 5 to 25 nm by varying time and temperature of the heat treatment. The structural and photoluminescence studies confirm the incorporation of rare-earth ions into the PbF2 nanocrystals and white and tuneable colour up-conversion luminescence has been detected in case of Yb3+-Er3+-Tm3+ and Yb3+-Ho3+-Tm3+ co-doped nanocrystals by varying dopant ratio and pump power.

Keywords

Sol–gel materials Glass–ceramics Rare-earth ions Up-conversion luminescence 

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • J. del-Castillo
    • 1
  • A. C. Yanes
    • 1
  • J. Méndez-Ramos
    • 2
  • V. K. Tikhomirov
    • 3
  • V. V. Moshchalkov
    • 3
  • V. D. Rodríguez
    • 2
  1. 1.Departamento de Física BásicaUniversidad de La LagunaTenerifeSpain
  2. 2.Departamento de Física Fundamental, Experimental, Electrónica y SistemasUniversidad de La LagunaTenerifeSpain
  3. 3.Institute for Nanoscale Physics and Chemistry (INPAC)Katholieke Universiteit LeuvenLeuvenBelgium

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