Mixed 3D–2D Passivation Treatment for Mixed-Cation Lead Mixed-Halide Perovskite Solar Cells for Higher Efficiency and Better Stability

摘要

Despite the great success in performance improvement, instability is their major drawback preventing the commercialization of perovskite-based optoelectronic devices. Also, relatively high density of bulk defects and trap states can be formed in polycrystalline thin-film perovskite. Various methods for interface passivation between perovskite and hole transport layer have been investigated to improve both stability and photovoltaic performance. In this study, we applied a mixed passivation (MP) treatment that is effectively enhancing both power conversion efficiency and stability.