Title: Effect of donor-acceptor concentration ratios on nonradiative energy transfer in closely packed CdTe quantum dots
Authors: Lin, Y. C.
Wang, W. J.
Chung, H. L.
Chou, W. C.
Chen, W. K.
Chang, W. H.
Susha, A. S.
Rogach, A. L.
電子物理學系
Department of Electrophysics
Issue Date: 28-Sep-2009
Abstract: This study investigates the dependence of Forster resonance energy transfer (FRET) on donor-acceptor (D/A) concentration ratios in mixed-size CdTe quantum dots (QDs) films by using photoluminescence (PL) and time-resolved PL spectroscopy. Experimental results indicate that an increasing donor concentration significantly quenches the emission intensity and lifetime in donor QDs and enhances that in acceptor QDs, providing clear evidence of increased FRET efficiency. When D/A ratio exceeds 6, however, the emission intensity and the lifetime of acceptors start to decline, reflecting a decreasing FRET efficiency because of a markedly declining availability of acceptor QDs. (C) 2009 American Institute of Physics. [doi:10.1063/1.3242371]
URI: http://dx.doi.org/10.1063/1.3242371
http://hdl.handle.net/11536/6653
ISSN: 0003-6951
DOI: 10.1063/1.3242371
Journal: APPLIED PHYSICS LETTERS
Volume: 95
Issue: 13
End Page: 
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