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This study compares solar cell performance with various buffer layers and thickness variations. CIGS-based solar cells commonly face issues like cliff-edge band formation, uneven coverage, and pinhole formation, reducing photocurrent and increasing recombination rates, thus lowering overall performance. Analyzing different buffer layer materials optimizes performance. For example, efficiency increased by 3.5% when CdS was replaced with ZnS. Although In2S3 offers high open-circuit voltage and short-circuit current, its durability and optoelectronic instability make it less preferred. A thorough investigation of various layers indicates that the ZnS buffer layer is the optimal choice, boasting an efficiency of 25.57% and a fill factor of 25.91%. Additionally, this study includes a theoretical examination of device performance at different operating temperatures.

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Optimizing Performance of CIGS Solar Cell Through Buffer Layer Variation

  • 会议论文

  • 发表日期：

    2026年

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  • Vipin Kumar Upaddhyay,
  • Anupam Sahu,
  • Ujair Alam

摘要

This study compares solar cell performance with various buffer layers and thickness variations. CIGS-based solar cells commonly face issues like cliff-edge band formation, uneven coverage, and pinhole formation, reducing photocurrent and increasing recombination rates, thus lowering overall performance. Analyzing different buffer layer materials optimizes performance. For example, efficiency increased by 3.5% when CdS was replaced with ZnS. Although In2S3 offers high open-circuit voltage and short-circuit current, its durability and optoelectronic instability make it less preferred. A thorough investigation of various layers indicates that the ZnS buffer layer is the optimal choice, boasting an efficiency of 25.57% and a fill factor of 25.91%. Additionally, this study includes a theoretical examination of device performance at different operating temperatures.