Electronically Monodisperse Single-Walled Carbon Nanotube Thin Films as Transparent Conducting Anodes in Organic Photovoltaic Devices

Authors

  • Timothy P. Tyler,

    1. Department of Materials Science & Engineering, Department of Chemistry, Department of Medicine and the Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3108, USA
    Current affiliation:
    1. These authors contributed equally to this work.
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  • Ryan E. Brock,

    1. Department of Materials Science & Engineering, Department of Chemistry, Department of Medicine and the Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3108, USA
    Current affiliation:
    1. These authors contributed equally to this work.
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  • Hunter J. Karmel,

    1. Department of Materials Science & Engineering, Department of Chemistry, Department of Medicine and the Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3108, USA
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  • Tobin J. Marks,

    1. Department of Materials Science & Engineering, Department of Chemistry, Department of Medicine and the Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3108, USA
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  • Mark C. Hersam

    Corresponding author
    1. Department of Materials Science & Engineering, Department of Chemistry, Department of Medicine and the Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3108, USA
    • Department of Materials Science & Engineering, Department of Chemistry, Department of Medicine and the Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3108, USA.
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Abstract

original image

Single-walled carbon nanotubes (SWNTs) sorted by electronic type are employed as organic photovoltaic device anodes. Metal-enriched SWNT films yield device efficiencies that are fifty times greater than their semiconducting counterparts. Through sheet resistance, UV-vis-NIR optical absorbance, and X-ray photoelectron spectroscopy measurements, the OPV charge blocking layer PEDOT:PSS is found to reverse the original chemical doping of the SWNT films. The relative insensitivity of metallic SWNTs to chemical doping thus explains the improved performance of metal-enriched SWNT films as OPV anodes.

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