Improved Organometal Halide Perovskite Solar Cell Performance via Morphological Control and Substrate Parameter Optimization

Abstract

This research presents a comparative analysis of solar cells utilizing organometal halide perovskite, with titanium dioxide (TiO₂) and zinc oxide (ZnO) employed as electron transport materials (ETMs). Utilizing SCAPS-1D simulations, the study investigates the influence of absorber and ETM thickness, interface trap density of states, and dopant concentration on photovoltaic solar cell performance. The findings reveal that increasing the thickness of the MAPbI₃ perovskite layer up to 700 nm enhances power conversion efficiency (PCE), while thickness increments beyond 90 nm for TiO₂ and ZnO layers diminish efficiency. The research underscores the importance of controlling the morphology of CH₃NH₃PbI₃ perovskite solar cells (PSC) for achieving high efficiency and explores experimental and theoretical approaches to attain efficiencies of up to 29%. Additionally, the study examines the significance of optimizing thickness, reducing defect density, and incorporating a back contact with a higher work function, suggesting that replacing the TiO₂ layer with a ZnO layer could enhance solar cell performance