Sb₂Se₃ and Sb₂S₃ are two types of thin-film solar cell (TFSC) absorbers that have drawn considerable interest and advanced quickly. These materials have several advantages over conventional TFSCs, such as suitable bandgap, high absorption coefficient, low cost, and simple structure. However, these materials also face challenges due to the interface recombination and energy band alignment with the electron transport layer (ETL). To address these issues, this study proposes the use of Zn_xCd_1−xS_ySe_1−y as a tunable ETL that can optimize the conduction band offset at the interface with the absorber layer. Using the Solar Cell Capacitance Simulator, this work simulates the device performance for different values of x and y in the ETL and finds the optimal ratios that maximize the efficiency. Sb₂Se₃ solar cells achieve an efficiency of 18.7%, representing a 3%-point increase compared to Sb₂S₃ solar cells, which have an efficiency of 15.8%. This study demonstrates the promising potential of Sb₂Se₃ and Sb₂S₃ as materials for thin-film solar cells. Additionally, it highlights the effectiveness of Zn_xCd_1−xS_ySe_1−y as an ETL in enhancing the performance of these solar cells.

Sb ₂ Se ₃和Sb ₂ S ₃是两种类型的薄膜太阳能电池（TFSC）吸收剂，引起了人们极大的兴趣并迅速发展。与传统的TFSC相比，这些材料具有合适的带隙、高吸收系数、低成本和结构简单等优点。然而，由于与电子传输层（ETL）的界面复合和能带排列，这些材料也面临挑战。为了解决这些问题，本研究提出使用 Zn _x Cd _{1− x} S _y Se _{1− y}作为可调谐 ETL，可以优化与吸收层界面处的导带偏移。这项工作使用太阳能电池电容模拟器，模拟ETL 中不同x和y值的器件性能，并找到使效率最大化的最佳比率。 Sb ₂ Se ₃太阳能电池的效率达到18.7%，比Sb ₂ S ₃太阳能电池的效率15.8%提高了3个百分点。这项研究证明了Sb ₂ Se ₃和Sb ₂ S ₃作为薄膜太阳能电池材料的巨大潜力。此外，它还强调了 Zn _x Cd _{1− x} S _y Se _{1− y}作为 ETL 在增强这些太阳能电池性能方面的有效性。