Journal of Nanoparticle Research

, Volume 10, Issue 3, pp 499–506

Energy transfer from the host to Er3+ dopants in semiconductor SnO2 nanocrystals segregated in sol–gel silica glasses

  • Javier del-Castillo
  • V. D. Rodríguez
  • A. C. Yanes
  • J. Méndez-Ramos
Research Paper

Abstract

Undoped and Er3+-doped glass–ceramics of composition (100−x)SiO2–xSnO2, with x = 5 or 10 and with 0.4 or 0.8 mol% of Er3+ ions, were synthesised by thermal treatment of precursor sol–gel glasses. Structural studies were developed by X-Ray Diffraction. Wide band gap SnO2 semiconductor quantum-dots embedded in the insulator SiO2 glass are obtained. The mean radius of the SnO2 nanocrystals, ranging from 2 to 3.2 nm, is comparable to the exciton Bohr radius. The luminescence properties have been analysed as a function of sample composition and thermal treatment. The results show that Er3+ ions are partially partitioned into the nanocrystalline phase. An efficient UV excitation of the Er3+ ions by energy transfer from the SnO2 nanocrystal host is observed. The Er3+ ions located in the SnO2 nanocrystals are selectively excited by this energy transfer mechanism. On the other hand, emission from the Er3+ ions remaining in the silica glassy phase is obtained by direct excitation of these ions.

Keywords

Nanostructured materials sol–gel glass–ceramics Er3+ Luminescence Synthesis Thermal treatment 

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Javier del-Castillo
    • 1
  • V. D. Rodríguez
    • 2
  • A. C. Yanes
    • 1
  • J. Méndez-Ramos
    • 2
  1. 1.Departamento Física Básica Universidad de La LagunaLa Laguna, TenerifeSpain
  2. 2.Departamento Física Fundamental y Experimental, Electrónica y SistemasUniversidad de La LagunaLa Laguna, TenerifeSpain

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