Issue 47, 2006
From the journal:

Journal of Materials Chemistry

Eu3+-doped CdS nanocrystals in SiO2 matrices: one-pot sol–gel synthesis and optical characterization

Beatriz Julián,*ab   José Planelles,a   Eloisa Cordoncillo,a   Purificación Escribano,a   Patrick Aschehoug,b   Clément Sanchez,b   Bruno Vianab  and  Fabienne Pelléb  

* Corresponding authors

a Departamento de Química Inorgánica y Orgánica, ESTCE, Universitat Jaume I, Castellón, Spain
E-mail: julian@qio.uji.es
Fax: +34 964 728214
Tel: +34 964 728234

b Laboratoire de Chimie de la Matière Condensée, CNRS-UMR 7574, Paris, France
E-mail: bruno-viana@enscp.fr, fabienne-pelle@enscp.fr
Fax: +33 146347489
Tel: +33 153737933

Abstract

An enhancement of the europium luminescence has been reported in Eu-doped SiO2 materials by interaction with adsorbed CdS nanoparticles. In this paper, the preparation of homogeneous Eu3+-doped CdS nanocrystals embedded in SiO2 sol–gel matrices by a simple “one-pot” method is reported. The synthesis conditions have been varied in order to modify the distribution of the lanthanide ions and the CdS nanoparticles within the nanocomposite. The structural modifications involve different strengths in the Eu3+–CdS interaction. The effect of these interactions on the Eu3+ luminescence is discussed. The absorption, excitation and emission spectra of the Eu3+ species, as well as the time-resolved luminescence, revealed the existence of an efficient CdS → Eu3+ energy transfer, responsible for the increase in the fluorescence intensity. However, when these species are spatially close, a diminution of the total emission and lifetime values is observed as a result of a back transfer from the Eu3+ ions to CdS nanoparticles.

Graphical abstract: Eu3+-doped CdS nanocrystals in SiO2 matrices: one-pot sol–gel synthesis and optical characterization

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Article information

DOI
https://doi.org/10.1039/B612519K
Article type
Paper
Submitted
30 Aug 2006
Accepted
26 Sep 2006
First published
12 Oct 2006

J. Mater. Chem., 2006,16, 4612-4618

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Eu3+-doped CdS nanocrystals in SiO2 matrices: one-pot sol–gel synthesis and optical characterization

B. Julián, J. Planelles, E. Cordoncillo, P. Escribano, P. Aschehoug, C. Sanchez, B. Viana and F. Pellé, J. Mater. Chem., 2006, 16, 4612 DOI: 10.1039/B612519K

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