Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 8, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3319838
Keywords
cadmium compounds; conducting polymers; excitons; II-VI semiconductors; nanocomposites; nanofabrication; organic-inorganic hybrid materials; photoluminescence
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Funding
- DFG [RO2345/5-1]
- Nanosystems Initiative Munich (NIM)
- LMUexcellent
- Alexander von Humboldt foundation
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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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