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<p>Perovskite (AVABr)<sub>x</sub>(MA)<sub>1-x</sub>PbI<sub>3</sub> thin films were constructed utilizing the spin coating technique under an argon environment. The consequence of 5-ammonium valeric acid bromide (5-AVABr) doping ratio on the structure and microstructure of MAPbI<sub>3</sub> film was studied using X-ray diffraction equipment. The absorbance of the samples was influenced by the amount of AVABr doping. The transmission data diminished for films containing a varying percentage of AVABr across the entire wavelength range, with the exception of films containing 25% AVABr. The optical band gap energy exhibited a maximum of 1.62&#xa0;eV at 25% AVABr and a minimum of 1.58&#xa0;eV at 5 and 15% AVABr concentrations. Different models were employed to find out the value of the refractive index (<i>n</i>) of each film. Films containing 5 and 15% AVABr resulted in an <i>n</i>-average of 2.98, up from 2.97 for the film with x = 0. Films containing 5 or 15% AVAI displayed higher dielectric constant values. The highest optical conductivity value is found in a film containing 25% AVABr. Films containing 5 or 15% AVABr have enhanced nonlinear optical characteristics. The films that included 15% AVABr showed the most intense photoluminescent results.</p>

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Optical features of perovskite (AVABr)x(MA)1-xPbI3 thin films; x = 0, 0.05, 0.1, 0.15, 0.25

  • 期刊论文

  • 发表日期：

    2025年9月19日

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  • A. M. El-naggar,
  • Anwar Q. Alanazi,
  • A. M. Kamal,
  • A. M. Aldhafiri,
  • Ghaida S. Al hisan,
  • Ahmad A. Alsaleh,
  • Amanullah Fatehmulla

摘要

Perovskite (AVABr)x(MA)1-xPbI3 thin films were constructed utilizing the spin coating technique under an argon environment. The consequence of 5-ammonium valeric acid bromide (5-AVABr) doping ratio on the structure and microstructure of MAPbI3 film was studied using X-ray diffraction equipment. The absorbance of the samples was influenced by the amount of AVABr doping. The transmission data diminished for films containing a varying percentage of AVABr across the entire wavelength range, with the exception of films containing 25% AVABr. The optical band gap energy exhibited a maximum of 1.62 eV at 25% AVABr and a minimum of 1.58 eV at 5 and 15% AVABr concentrations. Different models were employed to find out the value of the refractive index (n) of each film. Films containing 5 and 15% AVABr resulted in an n-average of 2.98, up from 2.97 for the film with x = 0. Films containing 5 or 15% AVAI displayed higher dielectric constant values. The highest optical conductivity value is found in a film containing 25% AVABr. Films containing 5 or 15% AVABr have enhanced nonlinear optical characteristics. The films that included 15% AVABr showed the most intense photoluminescent results.