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<p>In this study, we report the structural, optical, and electrical properties of lead-free CsSnBr<sub>3</sub> perovskite synthesized via melt growth. UV–Vis absorption and Tauc plot analysis reveal a direct optical band gap of 1.75&#xa0;eV. Photoluminescence and time-resolved PL measurements confirm efficient radiative recombination and reveal carrier lifetimes on the nanosecond scale. Impedance spectroscopy and dielectric analysis across 300–400&#xa0;K show non-Debye relaxation and support a small-polaron hopping conduction mechanism, with activation energies consistent with frequency-dependent conductivity. A unique correlation is established between the optical carrier dynamics and low-frequency electrical behavior. These findings contribute to a deeper understanding of charge transport in CsSnBr<sub>3</sub> and support its potential use in lead-free optoelectronic applications such as photodetectors and solar energy conversion.</p>

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Exploring the optical and electrical properties of CsSnBr3 for optoelectronic technologies

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月23日

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  • Dhaifallah R. Almalawi,
  • Mohamed Bouzidi,
  • Idris H. Smaili,
  • N. I. Aljuraide,
  • Ali Alzahrani,
  • A. Saftah,
  • Mohamed Ben Bechir

摘要

In this study, we report the structural, optical, and electrical properties of lead-free CsSnBr3 perovskite synthesized via melt growth. UV–Vis absorption and Tauc plot analysis reveal a direct optical band gap of 1.75 eV. Photoluminescence and time-resolved PL measurements confirm efficient radiative recombination and reveal carrier lifetimes on the nanosecond scale. Impedance spectroscopy and dielectric analysis across 300–400 K show non-Debye relaxation and support a small-polaron hopping conduction mechanism, with activation energies consistent with frequency-dependent conductivity. A unique correlation is established between the optical carrier dynamics and low-frequency electrical behavior. These findings contribute to a deeper understanding of charge transport in CsSnBr3 and support its potential use in lead-free optoelectronic applications such as photodetectors and solar energy conversion.