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

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7 Author(s)
Lutich, A.A. ; Department of Physics, Photonics and Optoelectronics Group, CeNS, Ludwig-Maximilians-Universität München, Amalienstrasse 54, 80799 Munich, Germany ; Poschl, Andreas ; Jiang, Guoxin ; Stefani, F.D.
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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.

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Applied Physics Letters  (Volume:96 ,  Issue: 8 )