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- W2019959905 abstract "We report a systematic study of the optoelectronic processes occurring in composites made of near-infrared (IR) emitting nanocrystals and conjugated polymers. We focus on PbSe and InAs∕ZnSe blended with polyphenylenevinylene-type polymers. We find that the process responsible for quenching the visible luminescence of the polymer by the nanocrystal varies depending on the nanocrystal composite. Moreover, the high (66%) energy-transfer efficiency from the polymer to the PbSe nanocrystal does result in significant emission at the near IR. Our measurements suggest that the host may be doping the PbSe nanocrystal, thus making the nonradiative Auger process favorable. For InAs we find the energy levels well aligned inside the polymer band gap, making it an efficient charge trap which acts as a luminescence center. Through two-dimensional numerical modeling of the charge transport in such composite films we highlight the importance of morphology (nanocrystal distribution) control." @default.
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- W2019959905 date "2005-10-01" @default.
- W2019959905 modified "2023-09-23" @default.
- W2019959905 title "Optoelectronic properties of polymer-nanocrystal composites active at near-infrared wavelengths" @default.
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- W2019959905 doi "https://doi.org/10.1063/1.2064307" @default.
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