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<p>This study offers a complete analysis of the optical properties of La<sub>0.67&#xa0;−&#xa0;x</sub>Pr<sub>x</sub>Ba<sub>0.33</sub>MnO<sub>3</sub> (x = 0.1 and x = 0.2) polycrystalline materials prepared by sol–gel auto-combustion method. The FTIR results confirmed the formation of the rhombohedral perovskite phase of the prepared materials. The SEM micrographs of the prepared materials showed agglomerated nanoparticles of 0.76&#xa0;µm (x = 0.1) and 0.97&#xa0;µm (x = 0.2), respectively. Optical characterization using UV–Visible absorption and diffuse reflectance spectroscopy indicated direct band gap transitions of approximately 3.84&#xa0;eV and 3.14&#xa0;eV for x = 0.1 and 0.2, respectively, with values relatively comparable to those reported in the literature. The refractive index, skin depth, optical and electrical conductivity, Urbach energy, and optical extinction coefficient were all determined as functions of photon wavelength. These results demonstrate how promising these compounds are for use in solar cells as well as optoelectronic devices.</p>

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Optical properties of Pr-doped La0.67 − xPrxBa0.33MnO3 (x = 0.1, 0.2) polycrystalline: absorption and reflectance analysis for solar cells and optoelectronics devices

  • 期刊论文

  • 发表日期：

    2026年5月11日

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  • Ameni Hidri,
  • Omar Rejaiba,
  • J. Khelifi,
  • Kamel Khirouni

摘要

This study offers a complete analysis of the optical properties of La0.67 − xPrxBa0.33MnO3 (x = 0.1 and x = 0.2) polycrystalline materials prepared by sol–gel auto-combustion method. The FTIR results confirmed the formation of the rhombohedral perovskite phase of the prepared materials. The SEM micrographs of the prepared materials showed agglomerated nanoparticles of 0.76 µm (x = 0.1) and 0.97 µm (x = 0.2), respectively. Optical characterization using UV–Visible absorption and diffuse reflectance spectroscopy indicated direct band gap transitions of approximately 3.84 eV and 3.14 eV for x = 0.1 and 0.2, respectively, with values relatively comparable to those reported in the literature. The refractive index, skin depth, optical and electrical conductivity, Urbach energy, and optical extinction coefficient were all determined as functions of photon wavelength. These results demonstrate how promising these compounds are for use in solar cells as well as optoelectronic devices.