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Solution-Processed Small Molecules Using Different Electron Linkers for High-Performance Solar Cells

Authors

  • Yongsheng Liu,

    1. Department of Materials Science and Engineering, University of California, Los Angeles, California 90095, USA
    2. California Nano Systems Institute, University of California, Los Angeles, CA 90095, USA
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  • Yang (Michael) Yang,

    1. Department of Materials Science and Engineering, University of California, Los Angeles, California 90095, USA
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  • Chun-Chao Chen,

    1. Department of Materials Science and Engineering, University of California, Los Angeles, California 90095, USA
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  • Qi Chen,

    1. Department of Materials Science and Engineering, University of California, Los Angeles, California 90095, USA
    2. California Nano Systems Institute, University of California, Los Angeles, CA 90095, USA
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  • Letian Dou,

    1. Department of Materials Science and Engineering, University of California, Los Angeles, California 90095, USA
    2. California Nano Systems Institute, University of California, Los Angeles, CA 90095, USA
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  • Ziruo Hong,

    1. Department of Materials Science and Engineering, University of California, Los Angeles, California 90095, USA
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  • Gang Li,

    1. Department of Materials Science and Engineering, University of California, Los Angeles, California 90095, USA
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  • Yang Yang

    Corresponding author
    1. Department of Materials Science and Engineering, University of California, Los Angeles, California 90095, USA
    2. California Nano Systems Institute, University of California, Los Angeles, CA 90095, USA
    • Department of Materials Science and Engineering, University of California, Los Angeles, California 90095, USA.===

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Abstract

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Conjugated acceptor–donor–acceptor small molecules using different electron linkers are designed, synthesized, and used in organic solar cells. All of these small molecules show high photoconversion efficiencies (PCEs), ranging from 3.18–6.15% under simulated AM 1.5G condition. A maximum PCE of 6.15% combined with a high Voc of 0.85 V, a Jsc of 10.79 mA cm−2 and a notable FF of 67.1% are achieved with T3/PC71BM blend based devices using polydimethylsiloxane as additive.

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