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CsSnBr3 is a Pb-free perovskite material for photovoltaic applications, offering an optimal bandgap, good charge transport properties, and environmental compatibility. However, its stability under operation remains a critical barrier to commercialization. This study employs SCAPS-1D simulation to systematically analyses key degradation pathways such as thermal stress, moisture exposure, and light-induced degradation in a planar n–p–p structure. Simulated variations in temperature, defect density, carrier mobility, and lifetime reveal distinct failure mechanisms: thermally activated recombination, moisture-induced mobility suppression and interface degradation, and light-induced carrier lifetime quenching. All pathways lead to significant loss in power conversion efficiency. These insights provide a comparative understanding of degradation dynamics and identify dominant failure modes, offering valuable guidance for designing more durable and efficient tin-based perovskite solar cells.

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Stability and Degradation Mechanisms of CsSnBr3 Perovskite Solar Cells: Comparative Insights into Thermal, Moisture, and Photonic Aging

  • 会议论文

  • 发表日期：

    2026年

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  • Velpuri Leeladevi,
  • Piyush Kuchhal,
  • Chanchal Kumar De,
  • Debasis De

摘要

CsSnBr3 is a Pb-free perovskite material for photovoltaic applications, offering an optimal bandgap, good charge transport properties, and environmental compatibility. However, its stability under operation remains a critical barrier to commercialization. This study employs SCAPS-1D simulation to systematically analyses key degradation pathways such as thermal stress, moisture exposure, and light-induced degradation in a planar n–p–p structure. Simulated variations in temperature, defect density, carrier mobility, and lifetime reveal distinct failure mechanisms: thermally activated recombination, moisture-induced mobility suppression and interface degradation, and light-induced carrier lifetime quenching. All pathways lead to significant loss in power conversion efficiency. These insights provide a comparative understanding of degradation dynamics and identify dominant failure modes, offering valuable guidance for designing more durable and efficient tin-based perovskite solar cells.