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<p>CZTS (copper zinc tin sulphur) based devices are increasingly popular due to their improved efficiency with different architectures for various types of solar cells (SCs). This study uses SCAPS-1D simulation software to model CZTS devices with a CZTSSe back-surface field (BSF) layer. We introduce a novel structure with a BSF layer to enhance solar cell performance, examining the effects of BSF layer thickness, BSF carrier concentration, temperature, and front and back contact work functions. Adding a BSF layer boosts efficiency to 20.43% at 70&#xa0;nm thickness. Electrical parameters rise with BSF doping concentration up to 10<sup>18</sup> cm<sup>-3</sup> before saturating. Efficiency, FF, J<sub>sc</sub>, and V<sub>oc</sub> decrease with rising temperatures but improve with a back contact work function up to 5.35&#xa0;eV. This study shows that CZTS-based photovoltaic devices with BSF layers can achieve high efficiency and stability.</p>

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Enhancing CZTS solar cell performance via back surface field in simulation engineering

  • 期刊论文

  • 发表日期：

    2025年1月22日

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  • Sadanand Maurya,
  • Pratap Kumar Dakua,
  • Lalit Kumar Gupta,
  • Manvinder Singh,
  • Sri Krishna Singh,
  • Rajendra Prasad,
  • Abhinav Mishra,
  • D. K. Dwivedi

摘要

CZTS (copper zinc tin sulphur) based devices are increasingly popular due to their improved efficiency with different architectures for various types of solar cells (SCs). This study uses SCAPS-1D simulation software to model CZTS devices with a CZTSSe back-surface field (BSF) layer. We introduce a novel structure with a BSF layer to enhance solar cell performance, examining the effects of BSF layer thickness, BSF carrier concentration, temperature, and front and back contact work functions. Adding a BSF layer boosts efficiency to 20.43% at 70 nm thickness. Electrical parameters rise with BSF doping concentration up to 1018 cm-3 before saturating. Efficiency, FF, Jsc, and Voc decrease with rising temperatures but improve with a back contact work function up to 5.35 eV. This study shows that CZTS-based photovoltaic devices with BSF layers can achieve high efficiency and stability.