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Efficient energy transfer in layered hybrid organic/inorganic nanocomposites: A dual function of semiconductor nanocrystals

Source: Appl. Phys. Lett. 96, 083109 (2010); doi:10.1063/1.3319838

Published 24 February 2010

KEYWORDS and PACS
Keywords
PACS
  • 78.67.Sc
    Nanoaggregates; nanocomposites
  • 78.55.Hx
    Photoluminescence in solid inorganic materials
  • 71.35.-y
    Excitons and related phenomena
  • 73.22.Lp
    Collective excitations (nanoscale materials)
  • YEAR: 2010
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PUBLICATION DATA
ISSN:
1553-9644 (online)
Publisher:
AIP is a member of CrossRef AIP
Andrey A. Lutich,1 Andreas Pöschl,1 Guoxin Jiang,1 Fernando D. Stefani,1 Andrei S. Susha,2 Andrey L. Rogach,2 and Jochen Feldmann1
1Department of Physics, Photonics and Optoelectronics Group, CeNS, Ludwig-Maximilians-Universität München, Amalienstrasse 54, 80799 Munich, Germany
2Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
The efficiency of energy transfer in hybrid organic/inorganic nanocomposites based on conjugated polymers and semiconductor nanocrystals is strongly dependent on both the energy transfer rate and the rate of the nonradiative recombination of the polymer. We demonstrate that the polymer nonradiative recombination can be reduced by the suppression of exciton diffusion via proper morphology engineering of a hybrid structure. In the layer-by-layer assembled nanocomposite of a conjugated polymer and CdTe nanocrystals the latter have a dual role: first, they are efficient exciton acceptors and, second, they reduce nonradiative recombination in the polymer by suppressing exciton diffusion across the layers. ©2010 American Institute of Physics
History: Received 14 December 2009; accepted 23 January 2010; published 24 February 2010
Permalink: http://link.aip.org/link/?APPLAB/96/083109/1

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