Synthesis, characterization and optical studies on lanthanide-doped CdS quantum dots: new insights on CdS → lanthanide energy transfer mechanisms
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Otros documentos de la autoría: Escribano López, Purificación; Planelles Aragó, José; Cordoncillo, Eloisa; Ferreira, Rute A. S.; Carlos, Luís D.
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http://dx.doi.org/10.1039/C0JM03188G |
Metadatos
Título
Synthesis, characterization and optical studies on lanthanide-doped CdS quantum dots: new insights on CdS → lanthanide energy transfer mechanismsAutoría
Fecha de publicación
2011Editor
RSCISSN
0959-9428Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://pubs.rsc.org/en/content/articlelanding/2011/jm/c0jm03188g#!divAbstractResumen
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. ... [+]
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. [-]
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Journal of Materials Chemistry Issue 4, 2011Derechos de acceso
© The Royal Society of Chemistry 2011
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