Non-radiative exciton recombination through excitation energy transfer in quantum dot clusters

被引：11
|
作者：
Miyazaki, Jun [1 ]
Kinoshita, Shuichi [1 ]
Jin, Takashi [1 ,2 ]
机构：
[1] Osaka Univ, Grad Sch Frontier Biosci, Suita, Osaka 5650871, Japan
[2] Osaka Univ, WPI Immunol Frontier Res Ctr, Suita, Osaka 5650871, Japan
来源：
JOURNAL OF LUMINESCENCE | 2011年 / 131卷 / 03期
关键词：
Energy transfer; Quantum dots; Cluster; NANOCRYSTALS; SOLIDS;
D O I：
10.1016/j.jlumin.2010.11.006
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Excitation energy transfer (EET) processes in CdSe/CdZnS quantum dot (QD) clusters have been investigated in this study by measuring their time-resolved and spectrally resolved fluorescence intensities. The contributions of radiative and non-radiative exciton recombination through EET are evaluated, where the latter is expected to occur in a large class of QD ensembles because of the presence of nonluminescent QDs. It appears that the fluorescence decay in larger QDs serving as acceptor does not show an initial rise, in addition the lifetime of the acceptor QD is independent of the excitation wavelength, suggesting that an EET is followed mostly by non-radiative recombination. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：539 / 542
页数：4
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