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Investigation of a Conjugated Polyelectrolyte Interlayer for Inverted Polymer:Fullerene Solar Cells

Authors

  • Ruidong Xia,

    Corresponding author
    1. Department of Physics and Centre for Plastic Electronics, Blackett Laboratory, Imperial College London, London SW7 2BZ, United Kingdom, jenny.nelson@imperial.ac.uk; D.Bradley@imperial.ac.uk
    Current affiliation:
    1. Key Laboratory for Organic Electronics & Information Displays (KLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210046, China
    • Department of Physics and Centre for Plastic Electronics, Blackett Laboratory, Imperial College London, London SW7 2BZ, United Kingdom, jenny.nelson@imperial.ac.uk; D.Bradley@imperial.ac.uk.
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  • Dong-Seok Leem,

    1. Department of Chemistry and Centre for Plastic Electronics, Imperial College London, Prince Consort Road, London, SW7 2BW, United Kingdom
    Current affiliation:
    1. Display Devices Laboratory, Samsung Advanced Institute of Technology (SAIT), Republic of Korea
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  • Thomas Kirchartz,

    1. Department of Physics and Centre for Plastic Electronics, Blackett Laboratory, Imperial College London, London SW7 2BZ, United Kingdom, jenny.nelson@imperial.ac.uk; D.Bradley@imperial.ac.uk
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  • Steve Spencer,

    1. National Physical Laboratory, Teddington, Middlesex TW11 0LW, United Kingdom
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  • Craig Murphy,

    1. National Physical Laboratory, Teddington, Middlesex TW11 0LW, United Kingdom
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  • Zhicai He,

    1. Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
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  • Hongbin Wu,

    1. Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
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  • Shijian Su,

    1. Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
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  • Yong Cao,

    1. Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
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  • Ji Seon Kim,

    1. Department of Physics and Centre for Plastic Electronics, Blackett Laboratory, Imperial College London, London SW7 2BZ, United Kingdom, jenny.nelson@imperial.ac.uk; D.Bradley@imperial.ac.uk
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  • John C. deMello,

    1. Department of Chemistry and Centre for Plastic Electronics, Imperial College London, Prince Consort Road, London, SW7 2BW, United Kingdom
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  • Donal D.C. Bradley,

    1. Department of Physics and Centre for Plastic Electronics, Blackett Laboratory, Imperial College London, London SW7 2BZ, United Kingdom, jenny.nelson@imperial.ac.uk; D.Bradley@imperial.ac.uk
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  • Jenny Nelson

    1. Department of Physics and Centre for Plastic Electronics, Blackett Laboratory, Imperial College London, London SW7 2BZ, United Kingdom, jenny.nelson@imperial.ac.uk; D.Bradley@imperial.ac.uk
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Abstract

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Inverted bulk heterojunction solar cells are fabricated using a conjugated polyelectrolyte (PFN) as a cathode interlayer. Enhanced photovoltaic performance is achieved by adjusting the PFN thickness. Measurements of the optical transmittance, cathode work function (via UPS) and surface atomic composition (via XPS) provide insights into this optimization. Drift-diffusion simulations point to a reduction in recombination of holes at the cathode as the main cause for improving Voc.

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