A Comprehensive Guide to Bifacial Perovskite Solar Cells: Simulation and Optimization

Abstract

AbstractBifacial perovskite solar cells (PSCs) have received much attention from researchers and scientists. Recently, a certified power conversion efficiency (PCE) of 21.40% (front illumination) and 20.01% (rear illumination) of bifacial PSC has shown immense potential to take over the photovoltaic industry. However, the PCE bifacial PSCs still have a long way to go, as compared to their mono‐facial PSCs counterparts (PCE 26.1%). This gap in the performance level propels us to get more insight into the device physics of bifacial PSCs. In this work, bifacial PSCs are simulated and optimized by selecting an appropriate choice of the electron transport layer (ETL) and hole transport layer (HTL). In this study, it is found that the conduction band offset (CBO) and valance band offset (VBO) play a vital role in choosing a proper charge‐selective layer. The band alignment highly affects the Shockley‐Read‐Hall (SRH) recombination rate and consequently, the device performance. The bandgap of the rear transparent electrode (RTE) plays a vital role in photo‐absorption and band alignment at the HTL/RTE interface and hence the device performance. This investigation reveals that the perovskite absorber material should be intrinsic in semiconducting nature to achieve a higher bifacial factor from the device.