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    A comparative theoretical study of exciton-dissociation and charge-recombination processes in oligothiophene/fullerene and oligothiophene/perylenediimide complexes for organic solar cells

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    Type
    Article
    Authors
    Yi, Yuanping
    Coropceanu, Veaceslav cc
    Brédas, Jean-Luc
    KAUST Grant Number
    KUS-C1-015-21
    Date
    2011
    Permanent link to this record
    http://hdl.handle.net/10754/597235
    
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    Abstract
    The exciton-dissociation and charge-recombination processes in donor-acceptor complexes found in α-sexithienyl/C60 and α-sexithienyl/perylenetetracarboxydiimide (PDI) solar cells are investigated by means of quantum-chemical methods. The electronic couplings and exciton-dissociation and charge-recombination rates have been evaluated for various configurations of the complexes. The results suggest that the decay of the lowest charge-transfer state to the ground state in the PDI-based devices: (i) is faster than that in the fullerene-based devices and (ii) in most cases, can compete with the dissociation of the charge-transfer state into mobile charge carriers. This faster charge-recombination process is consistent with the lower performance observed experimentally for the devices using PDI derivatives as the acceptor. © 2011 The Royal Society of Chemistry.
    Citation
    Yi Y, Coropceanu V, Brédas J-L (2011) A comparative theoretical study of exciton-dissociation and charge-recombination processes in oligothiophene/fullerene and oligothiophene/perylenediimide complexes for organic solar cells. J Mater Chem 21: 1479. Available: http://dx.doi.org/10.1039/c0jm02467h.
    Sponsors
    This article is dedicated to Professor Fred Wudl on the occasion of his 70<SUP>th</SUP> birthday. For nearly five decades, Fred has been at the forefront of the field of conducting and semiconducting organic materials; his impact on our research has been invaluable. We are deeply grateful for all we have learned from him and for his friendship. This work has been partially supported by the Office of Naval Research and the Center for Advanced Molecular Photovoltaics (Award No. KUS-C1-015-21 given by King Abdullah University of Science and Technology, KAUST).
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Journal of Materials Chemistry
    DOI
    10.1039/c0jm02467h
    ae974a485f413a2113503eed53cd6c53
    10.1039/c0jm02467h
    Scopus Count
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    Publications Acknowledging KAUST Support

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