Scholarlink

<p>This study delves into optimization of the novel tandem and bilayer cells based on Al<sub>x</sub>Ga<sub>1−x</sub>As<sub>y</sub>Sb<sub>1−y</sub> as bottom absorber and Al<sub>x</sub>Ga<sub>1−x</sub>As as the top absorber. We used SCAPS-1D simulation tool and rigorous coupled wave analysis (RCWA) code to optimize the input parameters of the bottom cell, then those of the tandem and bilayer cells. The optimizing of the bottom cell leads to an efficiency of 20.73%, which surpasses recent experimental efficiencies by a factor of 6. Subsequently, the optimization of the top cell within the tandem configuration, reduced the thermalization losses by nearly half and almost doubled the efficiency. In the third stage, we investigated a novel AlGaAs-AlGaAsSb bilayer solar cell that could be a viable alternative to tandem cells due to their simplicity. Results show that this structure achieves 15% higher efficiency than a single cell when an Al₁As₀.₀₄Sb₀.₉₆ intermediate layer is inserted between the two absorber layers. The intermediate layer optimizes the valence band offset, thereby reducing recombination losses. In addition, the bilayer structure exhibits enhanced thermal stability compared to both single-junction and tandem cells, owing to its reduced thermalization losses. Finaly, a comprehensive analysis was conducted on the effects of series and shunt resistances, defects, temperature variations, and sunlight concentration on the optimized tandem cell. In particular, we found that the defect density in the top cell has a stronger impact on tandem cell efficiency than that in the bottom cell. Conversely, the defect density in the bottom cell plays a more significant role in determining the optimal matching current.</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

Numerical Prediction and Optimization of the Performance of Novel Bilayer and Tandem Solar Cells Based on AlxGa1−xAsySb1−y

  • 期刊论文

  • 发表日期：

    2025年9月6日

查看全文
  • Oussama TALEB JLIDI,
  • Rim HAJI,
  • Mohamed Iheb HAMMAMI,
  • Adnen MELLITI

摘要

This study delves into optimization of the novel tandem and bilayer cells based on AlxGa1−xAsySb1−y as bottom absorber and AlxGa1−xAs as the top absorber. We used SCAPS-1D simulation tool and rigorous coupled wave analysis (RCWA) code to optimize the input parameters of the bottom cell, then those of the tandem and bilayer cells. The optimizing of the bottom cell leads to an efficiency of 20.73%, which surpasses recent experimental efficiencies by a factor of 6. Subsequently, the optimization of the top cell within the tandem configuration, reduced the thermalization losses by nearly half and almost doubled the efficiency. In the third stage, we investigated a novel AlGaAs-AlGaAsSb bilayer solar cell that could be a viable alternative to tandem cells due to their simplicity. Results show that this structure achieves 15% higher efficiency than a single cell when an Al₁As₀.₀₄Sb₀.₉₆ intermediate layer is inserted between the two absorber layers. The intermediate layer optimizes the valence band offset, thereby reducing recombination losses. In addition, the bilayer structure exhibits enhanced thermal stability compared to both single-junction and tandem cells, owing to its reduced thermalization losses. Finaly, a comprehensive analysis was conducted on the effects of series and shunt resistances, defects, temperature variations, and sunlight concentration on the optimized tandem cell. In particular, we found that the defect density in the top cell has a stronger impact on tandem cell efficiency than that in the bottom cell. Conversely, the defect density in the bottom cell plays a more significant role in determining the optimal matching current.