SCAPS-1D Simulation Data: CsSnBr3/Si Tandem Solar Cell

Hypothesis: A lead-free CsSnBr3/silicon tandem solar cell with two terminals can exceed the efficiency limits of a single junction through optimization, current matching, and spectral splitting.
What the data shows: Simulation workflow in SCAPS-1D for a 2-terminal perovskite/silicon tandem cell. Data on the optical and electrical properties of the materials for each layer of the sub-cells. Optimization of individual subcells (top perovskite cell and bottom silicon cell). Analysis and filtered spectrum data for perovskite thickness variation (100-700 nm). Analysis and data for current density matching at 250 nm/130 µm. Final tandem performance via interpolation of the sub-cells.
Key results: The optimal thickness of CsSnBr3 was 250 nm for current density matching. The efficiency of the tandem device was 32.70% with an average EQE of 93.10%. The tandem achieved higher efficiency by connecting the sub-cells in series.
Interpretation and use: Researchers can reproduce the design and simulation using the .def and .material files provided in SCAPS-1D. They can analyze the effects of optical filtering, validate the current density matching methodology, and extend studies on perovskite-silicon tandem architectures.
The files include: structure definitions (.def), material parameters (.material), absorption coefficients (.txt), optimization results (.csv), J-V curves (.txt), band diagrams (.txt), filtered spectra (.cvs), and EQE data (.txt). It enables complete reproduction and analysis of the tandem design process.