Improved Stability of FAPbI(3)-Based Mixed-Cation Perovskite Solar Cells Fabricated Using Facile Cation Injection Technology

Abstract

Compositional engineering adding organic and inorganic cations is considered one of the effective ways to improve the optoelectronic performance of PSCs. However, investigations of mixed-cations in PSCs are still a nascent area of research. In this study, an anti-solvent suitable for the preparation of mixed- cation perovskite was first adopted. We presented a simple surface engineering technique for manufacturing mixed-cation perovskite by injecting cations through the process of post-treatment of the adopted anti-solvent treated pure FAPbI(3) film with methylammonium iodide (MAI) solution. The prepared mixed-cation perovskite film showed uniform particle size, particle growth, and significantly improved short-circuit current, charge coefficient, device efficiency and device stability.