|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.
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|
|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.|
|期刊:||ULTRAFAST PHENOMENA IN SEMICONDUCTORS AND NANOSTRUCTURE MATERIALS XV|
|Appears in Collections:||Conferences Paper|
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