High-performance CsPbI3/XPbI3 (X=MA and FA) heterojunction perovskite solar cell

In the past few years, perovskite solar cells (PSC) have continued to be a hot and trending topic due to high power conversion efficiency (PCE) and low fabrication cost. As a newly emerging class of PSCs, perovskite heterojunctions consisting of two different perovskite layers could make far-reaching changes in solar cell efficiency and stability. Here, in this work, we have systematically investigated the performance of CsPbI 3/XPbI 3 (X=MA and FA) heterojunction perovskite solar cell using the Solar Cell Capacitance Simulator (SCAPS-1D) software. We show how the photovoltaic performance i.e., short-circuit current density (JSC), open-circuit voltage (VOC), PCE, fill factor (FF), and quantum efficiency (QE) depends upon the thickness of layers, as well as the architecture of heterojunction. Under optimized condition, it was found that, the PCE% of CsPbI 3/FAPbI 3 and CsPbI 3/MAPbI 3 heterostructures increase from 13.1% (non-heterojunction structure) to 20.2% and 20.9% (by making heterojunction), respectively. The results in this work aim to give an insightful understanding of the CsPbI 3/XPbI 3 (X=MA and FA) heterojunctions, which definitely contributes to the design of perovskite interface systems for high-performance solar cell devices.