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Enhanced Efficiency Parameters of Solution-Processable Small-Molecule Solar Cells Depending on ITO Sheet Resistance

Authors

  • Dong Hwan Wang,

    1. Center for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, California 93106-5090, USA
    Current affiliation:
    1. D.H.W and A.K.K.K contributed equally to this work.
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  • Aung Ko Ko Kyaw,

    1. Center for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, California 93106-5090, USA
    Current affiliation:
    1. D.H.W and A.K.K.K contributed equally to this work.
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  • Vinay Gupta,

    1. Organic and Hybrid Solar Cell Group, CSIR- National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi, 110012, India
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  • Guillermo C. Bazan,

    1. Center for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, California 93106-5090, USA
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  • Alan J. Heeger

    Corresponding author
    1. Center for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, California 93106-5090, USA
    • Center for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, California 93106-5090, USA.
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Abstract

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Enhanced efficiency parameters of solution-processable small-molecule bulk-heterojunction solar cells are successfully achieved using ITO substrate with a sheet resistance of 5 Ω/□. The PCE of the device with a 5 Ω/□-ITO shows 8.24% with enhanced JSC of 14.74 mA/cm2, and fill factor of 72.4%. Furthermore, the PCE and FF values are optimized and reproducible due to an improved shunt resistance and a reduced series resistance of the small molecule solar cells.

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