標題: Forster resonance energy transfer in mixed-size CdTe quantum dots with optimized donor-acceptor concentration ratio
作者: Lin, Y. C.
Chou, W. C.
Susha, A. S.
Rogach, A. L.
電子物理學系
Department of Electrophysics
關鍵字: semiconductor quantum dots;nanocrystals;II-VI semiconductors;cadmium compounds;tellurides;energy transfer;nonradiative transitions;photoluminescence;time-resolved spectra;radiative lifetimes
公開日期: 2011
摘要: The dynamics of Forster 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.
URI: http://hdl.handle.net/11536/2463
http://dx.doi.org/10.1117/12.875859
ISBN: 978-0-8194-8474-1
ISSN: 0277-786X
DOI: 10.1117/12.875859
期刊: ULTRAFAST PHENOMENA IN SEMICONDUCTORS AND NANOSTRUCTURE MATERIALS XV
Volume: 7937
Appears in Collections:Conferences Paper


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