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    Siloxane-Terminated Solubilizing Side Chains: Bringing Conjugated Polymer Backbones Closer and Boosting Hole Mobilities in Thin-Film Transistors

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    Type
    Article
    Authors
    Mei, Jianguo
    Kim, Do Hwan
    Ayzner, Alexander L.
    Toney, Michael F.
    Bao, Zhenan
    KAUST Grant Number
    KUS-C1-015-21
    Date
    2011-12-21
    Permanent link to this record
    http://hdl.handle.net/10754/599617
    
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    Abstract
    We introduce a novel siloxane-terminated solubilizing group and demonstrate its effectiveness as a side chain in an isoindigo-based conjugated polymer. An average hole mobility of 2.00 cm 2 V -1 s -1 (with a maximum mobility of 2.48 cm 2 V -1 s -1), was obtained from solution-processed thin-film transistors, one of the highest mobilities reported to date. In contrast, the reference polymer with a branched alkyl side chain gave an average hole mobility of 0.30 cm 2 V -1 s -1 and a maximum mobility of 0.57 cm 2 V -1 s -1. This is largely explained by the polymer packing: our new polymer exhibited a π-π stacking distance of 3.58 Å, while the reference polymer showed a distance of 3.76 Å. © 2011 American Chemical Society.
    Citation
    Mei J, Kim DH, Ayzner AL, Toney MF, Bao Z (2011) Siloxane-Terminated Solubilizing Side Chains: Bringing Conjugated Polymer Backbones Closer and Boosting Hole Mobilities in Thin-Film Transistors. Journal of the American Chemical Society 133: 20130–20133. Available: http://dx.doi.org/10.1021/ja209328m.
    Sponsors
    This work was partially supported by the Center for Advanced Molecular Photovoltaics, award no. KUS-C1-015-21, made by King Abdullah University of Science and Technology. We also acknowledge support from the Global Climate and Energy Program at Stanford. GIXD measurements were carried out at the Stanford Synchrotron Radiation Laboratory, a national user facility operated by Stanford University on behalf of the U.S. Department of Energy, Office of Basic Energy Sciences. J.M. thanks the Camille and Henry Dreyfus Postdoctoral Program in Environmental Chemistry for a postdoctoral fellowship.
    Publisher
    American Chemical Society (ACS)
    Journal
    Journal of the American Chemical Society
    DOI
    10.1021/ja209328m
    PubMed ID
    22122218
    ae974a485f413a2113503eed53cd6c53
    10.1021/ja209328m
    Scopus Count
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