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Issue 7, 2011
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Hierarchical self-assembly of CdTe quantum dots into hyperbranched nanobundles: Suppression of biexciton Auger recombination

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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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Publication details

The article was received on 31 Jan 2011, accepted on 31 Mar 2011 and first published on 03 May 2011


Article type: Paper
DOI: 10.1039/C1NR10121H
Citation: 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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