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    Continuous, Highly Flexible, and Transparent Graphene Films by Chemical Vapor Deposition for Organic Photovoltaics

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    Type
    Article
    Authors
    Gomez De Arco, Lewis
    Zhang, Yi
    Schlenker, Cody W.
    Ryu, Koungmin
    Thompson, Mark E.
    Zhou, Chongwu
    KAUST Grant Number
    KUS-C1-015-21
    Date
    2010-04-15
    Online Publication Date
    2010-04-15
    Print Publication Date
    2010-05-25
    Permanent link to this record
    http://hdl.handle.net/10754/597850
    
    Metadata
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    Abstract
    We report the implementation of continuous, highly flexible, and transparent graphene films obtained by chemical vapor deposition (CVD) as transparent conductive electrodes (TCE) in organic photovoltaic cells. Graphene films were synthesized by CVD, transferred to transparent substrates, and evaluated in organic solar cell heterojunctions (TCE/poly-3,4- ethylenedioxythiophene:poly styrenesulfonate (PEDOT:PSS)/copper phthalocyanine/fullerene/bathocuproine/aluminum). Key to our success is the continuous nature of the CVD graphene films, which led to minimal surface roughness (∼ 0.9 nm) and offered sheet resistance down to 230 Ω/sq (at 72% transparency), much lower than stacked graphene flakes at similar transparency. In addition, solar cells with CVD graphene and indium tin oxide (ITO) electrodes were fabricated side-by-side on flexible polyethylene terephthalate (PET) substrates and were confirmed to offer comparable performance, with power conversion efficiencies (η) of 1.18 and 1.27%, respectively. Furthermore, CVD graphene solar cells demonstrated outstanding capability to operate under bending conditions up to 138°, whereas the ITO-based devices displayed cracks and irreversible failure under bending of 60°. Our work indicates the great potential of CVD graphene films for flexible photovoltaic applications. © 2010 American Chemical Society.
    Citation
    Gomez De Arco L, Zhang Y, Schlenker CW, Ryu K, Thompson ME, et al. (2010) Continuous, Highly Flexible, and Transparent Graphene Films by Chemical Vapor Deposition for Organic Photovoltaics. ACS Nano 4: 2865–2873. Available: http://dx.doi.org/10.1021/nn901587x.
    Sponsors
    This work was supported by the National Science Foundation under Grant CCF-0702204, by the Center for Advanced Molecular Photovoltaics (CAMP) (KUS-C1-015-21), made by King Abdullah University of Science and Technology (KAUST), and by Global Photonic Energy Corporation.
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Nano
    DOI
    10.1021/nn901587x
    PubMed ID
    20394355
    ae974a485f413a2113503eed53cd6c53
    10.1021/nn901587x
    Scopus Count
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