21 February 2011 Förster resonance energy transfer in mixed-size CdTe quantum dots with optimized donor-acceptor concentration ratio
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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.
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Y. C. Lin, W. C. Chou, A. S. Susha, A. L. Rogach, "Förster resonance energy transfer in mixed-size CdTe quantum dots with optimized donor-acceptor concentration ratio", Proc. SPIE 7937, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XV, 79371G (21 February 2011); doi: 10.1117/12.875859; https://doi.org/10.1117/12.875859
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