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Issue 4, 2011
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Synthesis, characterization and optical studies on lanthanide-doped CdS quantum dots: new insights on CdS → lanthanide energy transfer mechanisms

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Abstract

Eu3+-Doped CdS hexagonal nanocrystals (NCs), with an average size of ∼4 nm, have been prepared through a simple methodology based on the direct precipitation of CdS NCs using 1-thioglycerol as a capping molecule. Steady-state and time-resolved photoluminescence studies (14–300 K) reveal an effective CdS NCs-to-Eu3+ energy transfer process involving surface localized states and mediated by a thermally activated exchange mechanism. Furthermore, the analysis of the optical data also points out the presence of two distinct Eu3+ local coordination sites with different relaxation kinetics and attributed to lattice-bound and surface-bound centres. The 5D0 lifetime values are longer than those reported previously for sol–gel derived Eu3+-doped CdS NCs.

Graphical abstract: Synthesis, characterization and optical studies on lanthanide-doped CdS quantum dots: new insights on CdS → lanthanide energy transfer mechanisms

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Supplementary files

Article information


Submitted
23 Sep 2010
Accepted
27 Oct 2010
First published
23 Nov 2010

J. Mater. Chem., 2011,21, 1162-1170
Article type
Paper

Synthesis, characterization and optical studies on lanthanide-doped CdS quantum dots: new insights on CdS → lanthanide energy transfer mechanisms

J. Planelles-Aragó, E. Cordoncillo, R. A. S. Ferreira, L. D. Carlos and P. Escribano, J. Mater. Chem., 2011, 21, 1162
DOI: 10.1039/C0JM03188G

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