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Advanced Materials

Efficient Small Molecule Bulk Heterojunction Solar Cells with High Fill Factors via Pyrene-Directed Molecular Self-Assembly

Authors

  • Olivia P. Lee,

    1. Departments of Chemistry and Chemical Engineering, University of California Berkeley, Berkeley, CA 94720-1460, USA
    2. Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
    Current affiliation:
    1. These authors contributed equally to this work.
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  • Alan T. Yiu,

    1. Departments of Chemistry and Chemical Engineering, University of California Berkeley, Berkeley, CA 94720-1460, USA
    2. Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
    Current affiliation:
    1. These authors contributed equally to this work.
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  • Pierre M. Beaujuge,

    1. Departments of Chemistry and Chemical Engineering, University of California Berkeley, Berkeley, CA 94720-1460, USA
    2. Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
    3. King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
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  • Claire H. Woo,

    1. Departments of Chemistry and Chemical Engineering, University of California Berkeley, Berkeley, CA 94720-1460, USA
    2. Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
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  • Thomas W. Holcombe,

    1. Departments of Chemistry and Chemical Engineering, University of California Berkeley, Berkeley, CA 94720-1460, USA
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  • Jill E. Millstone,

    1. Departments of Chemistry and Chemical Engineering, University of California Berkeley, Berkeley, CA 94720-1460, USA
    2. Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
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  • Jessica D. Douglas,

    1. Departments of Chemistry and Chemical Engineering, University of California Berkeley, Berkeley, CA 94720-1460, USA
    2. Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
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  • Mark S. Chen,

    Corresponding author
    1. Departments of Chemistry and Chemical Engineering, University of California Berkeley, Berkeley, CA 94720-1460, USA
    • Departments of Chemistry and Chemical Engineering, University of California Berkeley, Berkeley, CA 94720-1460, USA.
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  • Jean M. J. Fréchet

    Corresponding author
    1. Departments of Chemistry and Chemical Engineering, University of California Berkeley, Berkeley, CA 94720-1460, USA
    2. Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
    3. King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
    • Departments of Chemistry and Chemical Engineering, University of California Berkeley, Berkeley, CA 94720-1460, USA.
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Abstract

Efficient organic photovoltaic (OPV) materials are constructed by attaching completely planar, symmetric end-groups to donor-acceptor electroactive small molecules. Appending C2-pyrene as the small molecule end-group to a diketopyrrolopyrrole core leads to materials with a tight, aligned crystal packing and favorable morphology dictated by ππ interactions, resulting in high power conversion efficiencies and high fill factors. The use of end-groups to direct molecular self-assembly is an effective strategy for designing high-performance small molecule OPV devices.

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