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High-Performance Metal-Free Solar Cells Using Stamp Transfer Printed Vapor Phase Polymerized Poly(3,4-Ethylenedioxythiophene) Top Anodes

Authors

  • Xiangjun Wang,

    1. Department of Physics and Centre for Plastic Electronics, The Blackett Laboratory, Imperial College London, SW7 2BZ London, UK
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  • Thilini Ishwara,

    1. Department of Physics and Centre for Plastic Electronics, The Blackett Laboratory, Imperial College London, SW7 2BZ London, UK
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  • Wei Gong,

    1. Department of Physics and Centre for Plastic Electronics, The Blackett Laboratory, Imperial College London, SW7 2BZ London, UK
    2. Key Laboratory of Luminescence and Optical Information, Ministry of Education and Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, P. R. China
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  • Mariano Campoy-Quiles,

    1. Institut de Ciència de Materials de Barcelona, UAB Campus, 08193 Bellaterra, Spain
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  • Jenny Nelson,

    Corresponding author
    1. Department of Physics and Centre for Plastic Electronics, The Blackett Laboratory, Imperial College London, SW7 2BZ London, UK
    • Department of Physics and Centre for Plastic Electronics, The Blackett Laboratory, Imperial College London, SW7 2BZ London, UK.
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  • Donal D. C. Bradley

    Corresponding author
    1. Department of Physics and Centre for Plastic Electronics, The Blackett Laboratory, Imperial College London, SW7 2BZ London, UK
    • Department of Physics and Centre for Plastic Electronics, The Blackett Laboratory, Imperial College London, SW7 2BZ London, UK.
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Abstract

The use of vapor phase polymerized poly(3,4-ethylenedioxythiophene) (VPP-PEDOT) as a metal-replacement top anode for inverted solar cells is reported. Devices with both i) standard bulk heterojunction blends of poly(3-hexylthiophene) (P3HT) donor and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C60 (PCBM) soluble fullerene acceptor and ii) hybrid inorganic/organic TiO2/P3HT acceptor/donor active layers are studied. Stamp transfer printing methods are used to deposit both the VPP-PEDOT top anode and a work function enhancing PEDOT:polystyrenesulphonate (PEDOT:PSS) interlayer. The metal-free devices perform comparably to conventional devices with an evaporated metal top anode, yielding power conversion efficiencies of 3% for bulk heterojunction blend and 0.6% for organic/inorganic hybrid structures. These encouraging results suggest that stamp transfer printed VPP-PEDOT provides a useful addition to the electrode materials tool-box available for low temperature and non-vacuum solar cell fabrication.

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