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 CsPbI3/XPbI3 (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 (J(SC)), open-circuit voltage (V-OC), 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 CsPbI3/FAPbI(3) and CsPbI3/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 CsPbI3/XPbI3 (X=MA and FA) heterojunctions, which definitely contributes to the design of perovskite interface systems for high-performance solar cell devices.