Trion Decay in Colloidal Quantum Dots

被引：257

作者：

Jha, Praket P. ^{[1
]}

Guyot-Sionnest, Philippe ^{[1
]}

机构：

[1] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA

来源：

ACS NANO | 2009年 / 3卷 / 04期

基金：

美国国家科学基金会;

关键词：

quantum dots; photoluminescence; cyclic voltammetry; trion; career recombination; Auger recombination; NANOCRYSTALS; CDSE; EXCITON;

D O I：

10.1021/nn9001177

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Using charged films of colloidal CdSe/CdS core/shell quantum dots of similar to 3.5 to 4.5 nm core diameters and 0.6 to 1.2 nm thick CdS shells, the radiative and nonradiative decay of the negatively charged exciton, the trion T-, are measured. The T- radiative rate is faster than the exciton by a factor of 2.2 +/- 0.4 and estimated at similar to 10 ns. The T- lifetime is similar to 0.7-1.5 ns for the samples measured and is longer than the biexciton lifetime by a factor or 7.5 +/- 1.7.

引用

页码：1011 / 1015

页数：5

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