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Enhanced Grain Size and Crystallinity in CH3NH3PbI3 Perovskite Films by Metal Additives to the Single-Step Solution Fabrication Process

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Abstract

Methods of obtaining large grain size and high crystallinity in absorber materials play an important role in fabrication of high-performance methylammonium lead iodide (MAPbI3) perovskite solar cells. Here we study the effect of adding small concentrations of Cd2+, Zn2+, and Fe2+salts to the perovskite precursor solution used in the single-step solution fabrication process. Enhanced grain size and crystallinity in MAPbI3 films were obtained by using 0.1% of Cd2+ or Zn2+in the precursor solution. Consequently, solar cells constructed with Cd- and Zn-doped perovskite films show a significant improvement in device performance. These results suggest that the process may be an effective and facile method to fabricate high-efficiency perovskite photovoltaic devices.

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Authors and Affiliations

  1. Wright Center for Photovoltaics Innovation and Commercialization, School for Solar and Advanced Renewable Energy, Department of Physics and Astronomy, University of Toledo, Toledo, OH, 43606, USA

    Zahrah S. Almutawah, Suneth C. Watthage, Zhaoning Song, Ramez H. Ahangharnejhad, Kamala K. Subedi, Niraj Shrestha, Adam B. Phillips, Yanfa Yan, Randy J. Ellingson & Michael J. Heben

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  1. Zahrah S. Almutawah
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  2. Suneth C. Watthage
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  3. Zhaoning Song
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  4. Ramez H. Ahangharnejhad
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  5. Kamala K. Subedi
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  6. Niraj Shrestha
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  7. Adam B. Phillips
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  8. Yanfa Yan
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  9. Randy J. Ellingson
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  10. Michael J. Heben
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Almutawah, Z.S., Watthage, S.C., Song, Z. et al. Enhanced Grain Size and Crystallinity in CH3NH3PbI3 Perovskite Films by Metal Additives to the Single-Step Solution Fabrication Process. MRS Advances 3, 3237–3242 (2018). https://doi.org/10.1557/adv.2018.413

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  • DOI: https://doi.org/10.1557/adv.2018.413

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