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

電子物理學系

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18 引文斯高帕斯（Scopus）

摘要

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.

原文	English
文章編號	133123
頁（從 - 到）	1-3
頁數	3
期刊	Applied Physics Letters
卷	95
發行號	13
DOIs	https://doi.org/10.1063/1.3242371
出版狀態	Published - 28 9月 2009

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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.",

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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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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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