Numerical simulation of all-inorganic CsPbI3 / CsGeI3 bilayer perovskite solar cells

Rui Duan; Ao Zhang; Jinning Wang; Xiaotong Peng

doi:10.1117/12.2682022

16 June 2023 Numerical simulation of all-inorganic CsPbI₃ / CsGeI₃ bilayer perovskite solar cells

Rui Duan, Ao Zhang, Jinning Wang, Xiaotong Peng

Proceedings Volume 12639, Third International Conference on Mechanical Design and Simulation (MDS 2023); 126391N (2023) https://doi.org/10.1117/12.2682022
Event: Third International Conference on Mechanical Design and Simulation (MDS 2023), 2023, Xi'an, China

Abstract

Perovskite solar cells (PSCs) have gained momentum in the photovoltaic field because of its high-power conversion efficiency (PCE) and low-cost manufacturing process. In the screening of perovskite materials, CsPbI₃ has attracted widespread due to its good thermal stability, high degradation resistance and excellent photovoltaic performance. However, CsPbI₃'s high band gap (1.73 eV) limits its development in single-junction PSC. In this study, we constructed a double absorption layer CsPbI₃/CsGeI₃ PSC with SCAPS-1D (solar cell capacitance simulator). Compared with the conventional single-layer structure of CsPbI3 PSC, the double-layer CsPbI₃/CsGeI₃ PSC has a broader absorption spectrum and better photovoltaic performance. We systematically analyzed the thickness and defect density of the absorber layer, and the operating temperature on the cell performance and obtained the optimal parameters. In addition, we selected the best electron transport layer and hole transport layer (ETL/HTL) for the double absorption layer CsPbI₃/CsGeI₃ PSC. Under the optimized conditions, all cell performance parameters improve significantly, and its PCE is as high as 28.92%.

Citation Download Citation

Rui Duan, Ao Zhang, Jinning Wang, and Xiaotong Peng "Numerical simulation of all-inorganic CsPbI₃ / CsGeI₃ bilayer perovskite solar cells", Proc. SPIE 12639, Third International Conference on Mechanical Design and Simulation (MDS 2023), 126391N (16 June 2023); https://doi.org/10.1117/12.2682022

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