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    Incomplete Exciton Harvesting from Fullerenes in Bulk Heterojunction Solar Cells

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    Type
    Article
    Authors
    Burkhard, George F.
    Hoke, Eric T.
    Scully, Shawn R.
    McGehee, Michael D.
    Date
    2009-12-09
    Permanent link to this record
    http://hdl.handle.net/10754/598607
    
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    Abstract
    We investigate the internal quantum efficiencies (IQEs) of high efficiency poly-3-hexylthiophene:[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM) solar cells and find them to be lower at wavelengths where the PCBM absorbs. Because the exciton diffusion length in PCBM is too small, excitons generated in PCBM decay before reaching the donor-acceptor interface. This result has implications for most state of the art organic solar cells, since all of the most efficient devices use fullerenes as electron acceptors. © 2009 American Chemical Society.
    Citation
    Burkhard GF, Hoke ET, Scully SR, McGehee MD (2009) Incomplete Exciton Harvesting from Fullerenes in Bulk Heterojunction Solar Cells. Nano Lett 9: 4037–4041. Available: http://dx.doi.org/10.1021/nl902205n.
    Sponsors
    This work was supported by the Center for Advanced Molecular Photovoltaics (Award No KUS-C1-015-21), made by King Abdullah University of Science and Technology (KAUST) and partially by the Global Climate Energy Project (GCEP). E.T.H. is supported by the National Science Foundation GRFP and the Fannie and John Hertz Foundation.
    Publisher
    American Chemical Society (ACS)
    Journal
    Nano Letters
    DOI
    10.1021/nl902205n
    PubMed ID
    19810728
    ae974a485f413a2113503eed53cd6c53
    10.1021/nl902205n
    Scopus Count
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