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<p>Organic/inorganic halide perovskites (OIHP), including the composition of methylammonium lead iodide bromide (MAPbI<sub>2</sub>Br), have gained increasing popularity in solar applications because to their exceptional optoelectronic characteristics. Despite the persistence of recombination losses and stability issues, MAPbI<sub>2</sub>Br remains a viable choice due to its bandgap of around 1.8&#xa0;eV. The objective of this study is to examine the process of introducing 6% chromium (Cr) into MAPbI<sub>2</sub>Br in order to address the aforementioned challenges. X-ray diffraction (XRD), current-voltage (J-V), and ultraviolet-visible spectroscopy (UV-vis) studies have demonstrated improved structural, optical, and photovoltaic characteristics of perovskite films doped with 6% Cr. The observed decrease in bandgap (from 1.99 to 1.94&#xa0;eV) as the crystal size grows (from 21.45 to 32.09&#xa0;nm) may be attributed to quantum size effects. The band structures of electronic materials undergo changes as the crystal size increases and the confinement of electrons decreases, leading to alterations in the bandgap energy. The Cr–MAPbI<sub>2</sub>Br device achieves an efficiency of 8.36%, surpassing the 7.40% efficiency of pure MAPbI<sub>2</sub>Br. This is a significant advancement towards enhancing the safety and effectiveness of perovskite solar cells.</p>

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Influence of Cr doping on the structural, optical, and photovoltaic properties of MAPbI2Br thin films

  • 期刊论文

  • 发表日期：

    2025年3月26日

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  • Badriah S. Almutairi,
  • Saddam Hussain,
  • Muhammad Iftikhar Khan,
  • Mongi Amami,
  • Xueqing Xu,
  • B. A. García-Grajeda,
  • J. M. Mendivil-Escalante

摘要

Organic/inorganic halide perovskites (OIHP), including the composition of methylammonium lead iodide bromide (MAPbI2Br), have gained increasing popularity in solar applications because to their exceptional optoelectronic characteristics. Despite the persistence of recombination losses and stability issues, MAPbI2Br remains a viable choice due to its bandgap of around 1.8 eV. The objective of this study is to examine the process of introducing 6% chromium (Cr) into MAPbI2Br in order to address the aforementioned challenges. X-ray diffraction (XRD), current-voltage (J-V), and ultraviolet-visible spectroscopy (UV-vis) studies have demonstrated improved structural, optical, and photovoltaic characteristics of perovskite films doped with 6% Cr. The observed decrease in bandgap (from 1.99 to 1.94 eV) as the crystal size grows (from 21.45 to 32.09 nm) may be attributed to quantum size effects. The band structures of electronic materials undergo changes as the crystal size increases and the confinement of electrons decreases, leading to alterations in the bandgap energy. The Cr–MAPbI2Br device achieves an efficiency of 8.36%, surpassing the 7.40% efficiency of pure MAPbI2Br. This is a significant advancement towards enhancing the safety and effectiveness of perovskite solar cells.