A double absorber heterojunction perovskite/CIGS solar cell is simulated using lead-free tin-based perovskite, Methylammonium tin iodide (CH₃NH₃SnI₃). In the present study, the device is simulated using SCAPS-1D and the structure is modelled without a hole-transport layer. In order to obtain an optimized and enhanced efficiency, study of the influence of parameters like absorber thickness, defect densities, and operating temperature is analysed. The optimized device structure Au/CH₃NH₃SnI₃/CIGS/TiO₂/ZnO:Al achieves high output results of open circuit voltage 0.86 V, short circuit current 41.84 mA/cm², fill factor 80.02% and efficiency 28.69%. The results were compared with the previously reported experimental data and it indicates that on optimizing different parameters of the absorber layer, the device can achieve high performance. Thus, this device structure can be modelled experimentally for further research.

使用无铅锡基钙钛矿、碘化甲基铵锡 (CH ₃ NH ₃ SnI ₃ )模拟双吸收器异质结钙钛矿/CIGS 太阳能电池。在本研究中，该器件使用 SCAPS-1D 进行模拟，并且在没有空穴传输层的情况下对结构进行建模。为了获得优化和提高的效率，分析了吸收体厚度、缺陷密度和工作温度等参数的影响。优化的器件结构Au/CH ₃ NH ₃ SnI ₃ /CIGS/TiO ₂ /ZnO:Al 实现了开路电压0.86 V、短路电流41.84 mA/cm ^{2 的}高输出结果，填充因子 80.02% 和效率 28.69%。结果与之前报道的实验数据进行了比较，表明通过优化吸收层的不同参数，该器件可以实现高性能。因此，可以对该器件结构进行实验建模以进行进一步研究。