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Proceedings Paper

Förster resonance energy transfer in mixed-size CdTe quantum dots with optimized donor-acceptor concentration ratio
Author(s): Y. C. Lin; W. C. Chou; A. S. Susha; A. L. Rogach
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Paper Abstract

The dynamics of Förster resonance energy transfer (FRET) in mixed-size water-soluble CdTe quantum dots (QDs) are studied by using photoluminescence (PL) and time-resolved PL spectroscopy. When donor concentration is increased, an enhancement of both the FRET and quantum efficiency in the mixed-size CdTe QDs films can be observed. Increasing donor concentration significantly quenches the emission intensity and lifetime in donor QDs and enhances that in acceptor QDs. However, as D/A ratios exceed 6, the emission intensity and the lifetime of acceptor QDs start to decline, reflecting a decreasing in both quantum and FRET efficiency due to a markedly declining availability of acceptor QDs.

Paper Details

Date Published: 21 February 2011
PDF: 11 pages
Proc. SPIE 7937, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XV, 79371G (21 February 2011); doi: 10.1117/12.875859
Show Author Affiliations
Y. C. Lin, National Chiao Tung Univ. (Taiwan)
W. C. Chou, National Chiao Tung Univ. (Taiwan)
A. S. Susha, City Univ. of Hong Kong (Hong Kong, China)
A. L. Rogach, City Univ. of Hong Kong (Hong Kong, China)


Published in SPIE Proceedings Vol. 7937:
Ultrafast Phenomena in Semiconductors and Nanostructure Materials XV
Kong-Thon Tsen; Jin-Joo Song; Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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