Novel Perovskite/Silicon Tandem Solar Cells with Lead-free Top-cells

In this paper, a novel Perovskite/Silicon tandem solar cells with lead-free top-cells are theoretically described. The proposed structure consists of two different perovskites, namely MASnI۲Br۱ and CsSnI۱Br۲ that applied in tandem configuration with silicon-based bottom sub cell. SCAPS-۱D device simulator is utilized to perform the device simulation for the two different tandem devices. Tandem design is investigated using widely used filtered spectrum and current matching techniques. Filtered spectrum is calculated at varying thicknesses of perovskite top cell, and the same is fed to bottom cell for obtaining the current matching curve at different bottom sub cell thicknesses. The scripting feature is utilized to calculate the tandem curve. The results of this study showed the ۲۷.۷% and ۲۵.۷% conversion efficiency for MASnI۲Br۱- Silicon and CsSnI۱Br۲- Silicon based two terminal monolithic tandem solar cell design. The open circuit voltage, short circuit current density, fill factor and conversion efficiency of MASnI۲Br۱-Si tandem solar cells are ۱.۷۳ V, ۱۸.۵۲ mA/cm۲ and ۰.۸۳ under global AM ۱.۵ conditions. Furthermore, the open circuit voltage, short circuit current density, fill factor and conversion efficiency of CsSnI۱Br۲-Si tandem solar cells are ۱.۷۱ V, ۱۷.۱۵ mA/cm۲ and ۰.۸۲ under global AM ۱.۵ conditions.

کلیدواژه ها:

Perovskite/Silicon ، MASnI۲Br۱-Si ، CsSnI۱Br۲-Si ، Tandem solar cells ، Lead-free Top-cells