Analysis of two-terminal perovskite/silicon tandem solar cells with differing texture structure, perovskite carrier lifetime and tunneling junction quality

Abstract

Presented here is the optimization of a planar two-terminal perovskite/silicon tandem solar cell with a texture structure. The developed simulation model is fitted to published experimental results, and the importance of current matching in the two-terminal structure is discussed. With the texture structure optimized and considering current matching, the optimal texture structure improves $J_{sc}$ from 17.9~mA/cm$^2$ to 20.87~mA/cm$^2$ compared to the planar structure, as well as improving the power conversion efficiency from 25.8% to 35.9%. Furthermore, if the quality of the perovskite thin film and tunneling junction efficiency with a smaller voltage penalty can be improved, then the efficiency can be further improved to 38.13%. This indicates that this tandem solar cell still has much room for improvement.