Issue 7, 2011
From the journal:

Nanoscale

Hierarchical self-assembly of CdTe quantum dots into hyperbranched nanobundles: Suppression of biexciton Auger recombination†

Ling-Yun Pan,ab   Yong-Lai Zhang,a   Hai-Yu Wang,*a   Hong Liu,b   Jing-Shan Luo,b   Hong Xia,a   Lei Zhao,c   Qi-Dai Chen,a   Shu-Ping Xu,d   Bing-Rong Gao,a   Li-Min Fue  and  Hong-Bo Sun*ab  

* Corresponding authors

a State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, China
E-mail: hbsun@jlu.edu.cn, haiyu_wang@jlu.edu.cn.

b College of Physics, Jilin University, 2699 Qianjin Street, Changchun, China

c School of Materials Science and Engineering, Jilin University, 5988 People's Avenue, Changchun, China

d State Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Street, Changchun, China

e Department of Chemistry, Renmin University of China, Beijing, China

Abstract

In this paper, we report a novel nanobundle structure formed by the hierarchical self-assembly of TGA-capped CdTe quantum dots. HR-TEM confirms the polycrystalline phase of the bundle structure, and that pristine quantum dots are the building units. The steady state absorption and luminescence properties of the pristine quantum dots can be well inherited by the nanobundles. In transient state observation, carrier quenching induced by Auger recombination is found to be remarkably suppressed. Electron delocalizing to close building units is considered to be the reason. Suppression of Auger recombination may earn much more time for charge separation, which makes the novel nanobundle structures suitable for the excellent donor material in solar cell applications.

Graphical abstract: Hierarchical self-assembly of CdTe quantum dots into hyperbranched nanobundles: Suppression of biexciton Auger recombination

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Article information

DOI
https://doi.org/10.1039/C1NR10121H
Article type
Paper
Submitted
31 Jan 2011
Accepted
31 Mar 2011
First published
03 May 2011

Nanoscale, 2011,3, 2882-2888

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Hierarchical self-assembly of CdTe quantum dots into hyperbranched nanobundles: Suppression of biexciton Auger recombination

L. Pan, Y. Zhang, H. Wang, H. Liu, J. Luo, H. Xia, L. Zhao, Q. Chen, S. Xu, B. Gao, L. Fu and H. Sun, Nanoscale, 2011, 3, 2882 DOI: 10.1039/C1NR10121H

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