Analysis of excitation energy transfer in quantum dot clusters in the presence of nonluminescent dots

被引：4

作者：

Miyazaki, Jun ^{[1
]}

Kinoshita, Shuichi ^{[1
]}

Jin, Takashi ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Frontier Biosci, Suita, Osaka 5650871, Japan

来源：

PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 8, NO 1 | 2011年 / 8卷 / 01期

关键词：

energy transfer; quantum dots; cluster; DYNAMICS;

D O I：

10.1002/pssc.201000678

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We studied the excitation energy transfer (EET) process in CdSe/CdZnS quantum dot (QD) clusters by measuring time-and spectrally-resolved fluorescence intensities. Radiative and non-radiative exciton recombinations that occurs after EET were evaluated: the latter occurred in a large class of QD ensembles because of the presence of nonluminescent (dark) QDs. Numerical simulation confirmed the effect of the dark QDs on time-dependent fluorescence intensities, and the results were compared with that of the experiment. Nonradiative recombination occurring after EET was found to be dominant in the low quantum yield of QDs. The EET rate as a function of QD energy was successfully calculated on the basis of these findings. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：54 / 57

页数：4

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