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

Authors

    • Departamento Física Básica Universidad de La Laguna
  • V. D. Rodríguez
    • Departamento Física Fundamental y Experimental, Electrónica y SistemasUniversidad de La Laguna
  • A. C. Yanes
    • Departamento Física Básica Universidad de La Laguna
  • J. Méndez-Ramos
    • Departamento Física Fundamental y Experimental, Electrónica y SistemasUniversidad de La Laguna
Research Paper

DOI: 10.1007/s11051-007-9283-x

Cite this article as:
del-Castillo, J., Rodríguez, V.D., Yanes, A.C. et al. J Nanopart Res (2008) 10: 499. doi:10.1007/s11051-007-9283-x

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 materialssol–gelglass–ceramicsEr3+LuminescenceSynthesisThermal treatment

Copyright information

© Springer Science+Business Media B.V. 2007