Hybrid 2D/3D Perovskite Film with Enhanced Crystallinity via PEAI Passivation in Perovskite Solar Cells

摘要

High quality and uniform perovskite films are fundamental for the performance of planar perovskite heterojunction solar cells. In this paper, phenylethylam-monium iodide (PEAI) is adopted to construct 2D/3D hybrid perovskite film, because it can interact with 3D perovskite crystals to motivate the formation of perovskite phase. In addition, PEAI deposited on hybrid perovskite film is adopted to eliminate the surface traps and suppress the recombination. Furthermore, we found that perovskite film exhibits improved crystallinity with PEAI passivation, which is essential for charge transportation in perovskite solar cell. These results demonstrate that PEAI passivation layer is a credible means to enhance the performance of perovskite solar cells.