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Influence of Photon Excess Energy on Charge Carrier Dynamics in a Polymer-Fullerene Solar Cell

Authors

  • Tom G. J. van der Hofstad,

    1. Molecular Materials and Nanosystems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
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  • Daniele Di Nuzzo,

    1. Molecular Materials and Nanosystems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
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  • Mauricio van den Berg,

    1. Molecular Materials and Nanosystems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
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  • René A. J. Janssen,

    1. Molecular Materials and Nanosystems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
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  • Stefan C. J. Meskers

    Corresponding author
    1. Molecular Materials and Nanosystems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
    • Molecular Materials and Nanosystems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands.
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Abstract

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Optical excitation of a polymer-fullerene solar cell via the charge-transfer transition at the donor-acceptor interface, leads to generation of charge carriers displaying dynamics that are indistinguishable from those generated by excitation of the conjugated polymer at higher photon energy. This indicates that excess energy liberated in the photoinduced electron transfer between polymer and fullerene is not essential for the charge carrier generation.

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