Optimization of interface property in tin-based perovskite solar cells

The recent works of Wei et al. highlight the importance of perovskite/electron transport layer (ETL) interface to the performance of tin-based perovskite solar cells. The optimization of both the lowest unoccupied molecular orbital energy levels and carrier mobility of ETLs can improve the device performance substantially. To further support the experimental findings, we present device simulations using commercial software to demonstrate the effect of the ETL on the photovoltaic performance, which is consistent with the experimental results.