Effect of donor-acceptor concentration ratios on nonradiative energy transfer in closely packed CdTe quantum dots

Y. C. Lin; W. J. Wang; H. L. Chung; Wu-Ching Chou; Wei-Kuo Chen; Wen-Hao Chang; A. S. Susha; A. L. Rogach

doi:10.1063/1.3242371

Effect of donor-acceptor concentration ratios on nonradiative energy transfer in closely packed CdTe quantum dots

Y. C. Lin, W. J. Wang, H. L. Chung, Wu-Ching Chou, Wei-Kuo Chen, Wen-Hao Chang, A. S. Susha, A. L. Rogach

Department of Electrophysics

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

This study investigates the dependence of Förster 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.

Original language	English
Article number	133123
Pages (from-to)	1-3
Number of pages	3
Journal	Applied Physics Letters
Volume	95
Issue number	13
DOIs	https://doi.org/10.1063/1.3242371
State	Published - 28 Sep 2009

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title = "Effect of donor-acceptor concentration ratios on nonradiative energy transfer in closely packed CdTe quantum dots",

abstract = "This study investigates the dependence of F{\"o}rster 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.",

author = "Lin, {Y. C.} and Wang, {W. J.} and Chung, {H. L.} and Wu-Ching Chou and Wei-Kuo Chen and Wen-Hao Chang and Susha, {A. S.} and Rogach, {A. L.}",

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AU - Lin, Y. C.

AU - Wang, W. J.

AU - Chung, H. L.

AU - Chou, Wu-Ching

AU - Chen, Wei-Kuo

AU - Chang, Wen-Hao

AU - Susha, A. S.

AU - Rogach, A. L.

PY - 2009/9/28

Y1 - 2009/9/28

N2 - This study investigates the dependence of Förster 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.

AB - This study investigates the dependence of Förster 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.

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DO - 10.1063/1.3242371

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EP - 3

JO - Applied Physics Letters

JF - Applied Physics Letters

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Effect of donor-acceptor concentration ratios on nonradiative energy transfer in closely packed CdTe quantum dots

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