Effects of Processing Conditions on the Recombination Reduction in Small Molecule Bulk Heterojunction Solar Cells

Authors

  • Peter Zalar,

    1. Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry and Department of Materials, University of California, Santa Barbara, Santa Barbara, CA, USA
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  • Martijn Kuik,

    1. Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry and Department of Materials, University of California, Santa Barbara, Santa Barbara, CA, USA
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  • Niva A. Ran,

    1. Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry and Department of Materials, University of California, Santa Barbara, Santa Barbara, CA, USA
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  • John A. Love,

    1. Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry and Department of Materials, University of California, Santa Barbara, Santa Barbara, CA, USA
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  • Thuc-Quyen Nguyen

    Corresponding author
    1. Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry and Department of Materials, University of California, Santa Barbara, Santa Barbara, CA, USA
    2. Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
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Abstract

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The steady-state bimolecular recombination in two solution-processed small molecule organic solar cell blends is studied. Using a variety of different processing conditions, the charge-carrier mobilities and morphological organization are radically changed. Despite these changes, no apparent correlation exists between these observations and the reduced Langevin recombination rate. The reduced Langevin recombination rate may more strongly depend on the donor:acceptor system than the morphology.

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