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<p>This study successfully demonstrated the potential of CZTSSe/ZnSe heterojunction solar cells, leveraging SCAPS-1D simulations to optimize device performance. By systematically tuning the absorber and buffer layer parameters, including thickness, doping density, defect density, operational temperature, and back metal contact work function, we achieved a significant improvement in photovoltaic performance. The optimized structure yielded an impressive open-circuit voltage (<i>V</i><sub>oc</sub>) of 1.19&#xa0;V, short-circuit current density (<i>J</i><sub>sc</sub>) of 27.7&#xa0;mA/cm<sup>2</sup>, fill factor (FF) of 89.6%, and high power conversion efficiency (PCE) of 29.53%. These results underscore the potential of ZnSe as an efficient, nontoxic buffer layer, contributing to reduced recombination losses and enhanced charge carrier transport. Overall, this work advances the feasibility of high-efficiency, environmentally friendly CZTSSe-based kësterite solar cells, paving the way for sustainable and scalable photovoltaic technologies. Further studies, including experimental validation and interfacial engineering, could push performance even closer to theoretical limits.</p>

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Optimization of CZTSSe/ZnSe Heterojunction Solar Cells: Achieving High Efficiency through SCAPS-1D Simulations

  • 期刊论文

  • 发表日期：

    2025年8月28日

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  • Arslan Ashfaq,
  • Elsammani Ali Shokralla,
  • Shoug M. Alghamdi,
  • Hind Albalawi,
  • Ubaid Ur Rehman,
  • Zahra Bayhan,
  • Sarah A. Alsalhi,
  • M. Musa Saad H.-E.

摘要

This study successfully demonstrated the potential of CZTSSe/ZnSe heterojunction solar cells, leveraging SCAPS-1D simulations to optimize device performance. By systematically tuning the absorber and buffer layer parameters, including thickness, doping density, defect density, operational temperature, and back metal contact work function, we achieved a significant improvement in photovoltaic performance. The optimized structure yielded an impressive open-circuit voltage (Voc) of 1.19 V, short-circuit current density (Jsc) of 27.7 mA/cm2, fill factor (FF) of 89.6%, and high power conversion efficiency (PCE) of 29.53%. These results underscore the potential of ZnSe as an efficient, nontoxic buffer layer, contributing to reduced recombination losses and enhanced charge carrier transport. Overall, this work advances the feasibility of high-efficiency, environmentally friendly CZTSSe-based kësterite solar cells, paving the way for sustainable and scalable photovoltaic technologies. Further studies, including experimental validation and interfacial engineering, could push performance even closer to theoretical limits.