4.6 Article

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

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

Funding

  1. DFG [RO2345/5-1]
  2. Nanosystems Initiative Munich (NIM)
  3. LMUexcellent
  4. 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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