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Advanced Materials

A Mechanistic Understanding of Processing Additive-Induced Efficiency Enhancement in Bulk Heterojunction Organic Solar Cells

Authors

  • Kristin Schmidt,

    1. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
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  • Christopher J. Tassone,

    1. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
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  • Jeremy R. Niskala,

    1. Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA, USA
    2. Department of Chemistry, University of California, Berkeley, CA, USA
    3. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
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  • Alan T. Yiu,

    1. Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA, USA
    2. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
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  • Olivia P. Lee,

    1. Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA, USA
    2. Department of Chemistry, University of California, Berkeley, CA, USA
    3. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
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  • Thomas M. Weiss,

    1. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
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  • Cheng Wang,

    1. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
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  • Jean M. J. Fréchet,

    1. Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA, USA
    2. Department of Chemistry, University of California, Berkeley, CA, USA
    3. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
    4. King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
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  • Pierre M. Beaujuge,

    1. King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
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  • Michael F. Toney

    Corresponding author
    1. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
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Abstract

The addition of processing additives is a widely used approach to increase power conversion efficiencies for many organic solar cells. We present how additives change the polymer conformation in the casting solution leading to a more intermixed phase-segregated network structure of the active layer which in turn results in a 5-fold enhancement in efficiency.

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