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

  • Zahrah S. Almutawah (a1), Suneth C. Watthage (a1), Zhaoning Song (a1), Ramez H. Ahangharnejhad (a1), Kamala K. Subedi (a1), Niraj Shrestha (a1), Adam B. Phillips (a1), Yanfa Yan (a1), Randy J. Ellingson (a1) and Michael J. Heben (a1)...

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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Keywords

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

  • Zahrah S. Almutawah (a1), Suneth C. Watthage (a1), Zhaoning Song (a1), Ramez H. Ahangharnejhad (a1), Kamala K. Subedi (a1), Niraj Shrestha (a1), Adam B. Phillips (a1), Yanfa Yan (a1), Randy J. Ellingson (a1) and Michael J. Heben (a1)...

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