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On Realizing Higher Efficiency Polymer Solar Cells Using a Textured Substrate Platform

Authors

  • Kanwar S. Nalwa,

    1. Department of Electrical and Computer Engineering, and Microelectronics Research Center, Iowa State University Ames, IA 50011, USA
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  • Joong-Mok Park,

    1. Ames Laboratory-USDOE & Department of Physics and Astronomy, Iowa State University Ames, IA 50011, USA
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  • Kai-Ming Ho,

    1. Ames Laboratory-USDOE & Department of Physics and Astronomy, Iowa State University Ames, IA 50011, USA
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  • Sumit Chaudhary

    Corresponding author
    1. Department of Electrical and Computer Engineering, and Microelectronics Research Center, Iowa State University Ames, IA 50011, USA
    • Department of Electrical and Computer Engineering, and Microelectronics Research Center, Iowa State University Ames, IA 50011, USA.
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Abstract

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Polythiophene:fullerene bulk-heterojunction solar cells are fabricated on a one-dimensional photoresist grating of 2 μm pitch and 300 nm height. These dimensions ensure conformal coating of the photovoltaic active-layer and lead to higher power conversion efficiency due to light-trapping, especially for higher wavelength photons.

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