Scholarlink

<p>Pairing thin-film cadmium selenide (CdSe) with silicon (Si) in two-terminal (2T) tandem solar cell (TSC) structures offers a route to high-efficiency, cost-effective, and potentially flexible photovoltaics. Despite the favorable optoelectronic properties of CdSe and the reliability of Si, very little effort has been made on CdSe/Si tandem structures, particularly on the all-thin-film flexible arrangements. Here, we used the SCAPS-1D device simulator to design and optimize CdSe/Si tandems. We first calibrated standalone CdSe and flexible (20 µm) Si single-junction cells to establish accurate baselines. The resulting calibrated CdSe and Si devices achieved power conversion efficiencies (PCE) of 6.0% and 14.6%, respectively. Then, an initial CdSe/Si tandem was constructed that delivered a PCE of 11.82%, below the standalone Si bottom cell. Open-circuit-voltage loss analysis identified the CdSe top sub-cell as the dominant bottleneck; accordingly, we optimized the top cell. The optimization focused on selecting and evaluating hole transport layer (HTL) structures to mitigate the CdSe/HTL valence-band-offset (VBO) challenge while minimizing bulk and interface defects and tuning the contact work function and series resistance. The optimized tandem structure exhibited an enhanced overall PCE of up to 25.46% after current matching, demonstrating the potential of the CdSe/Si architecture for high-efficiency photovoltaic applications. This work offers critical insights into interface and material selection engineering and opens avenues to further experimental realization on flexible tandem solar technologies.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Design and Optimization of all-thin-film CdSe/Si Tandem Solar Cells Using SCAPS-1D Simulation

  • 期刊论文

  • 发表日期：

    2026年2月11日

查看全文
  • Marwa S. Salem,
  • H. A. El-Demsisy,
  • Ahmed Shaker,
  • Kawther A. Al-Dhlan,
  • Muhammad Tauseef Qureshi,
  • Tariq S. Almurayziq,
  • Mohamed Okil

摘要

Pairing thin-film cadmium selenide (CdSe) with silicon (Si) in two-terminal (2T) tandem solar cell (TSC) structures offers a route to high-efficiency, cost-effective, and potentially flexible photovoltaics. Despite the favorable optoelectronic properties of CdSe and the reliability of Si, very little effort has been made on CdSe/Si tandem structures, particularly on the all-thin-film flexible arrangements. Here, we used the SCAPS-1D device simulator to design and optimize CdSe/Si tandems. We first calibrated standalone CdSe and flexible (20 µm) Si single-junction cells to establish accurate baselines. The resulting calibrated CdSe and Si devices achieved power conversion efficiencies (PCE) of 6.0% and 14.6%, respectively. Then, an initial CdSe/Si tandem was constructed that delivered a PCE of 11.82%, below the standalone Si bottom cell. Open-circuit-voltage loss analysis identified the CdSe top sub-cell as the dominant bottleneck; accordingly, we optimized the top cell. The optimization focused on selecting and evaluating hole transport layer (HTL) structures to mitigate the CdSe/HTL valence-band-offset (VBO) challenge while minimizing bulk and interface defects and tuning the contact work function and series resistance. The optimized tandem structure exhibited an enhanced overall PCE of up to 25.46% after current matching, demonstrating the potential of the CdSe/Si architecture for high-efficiency photovoltaic applications. This work offers critical insights into interface and material selection engineering and opens avenues to further experimental realization on flexible tandem solar technologies.