Review on the effects of solvent physical properties on the performance of slot-die coated perovskite solar cells

Abstract Slot-die coating (SDC) has become a great method for fabricating large-area perovskite solar cells and modules due to controllable film thickness, high solution utilization rate, wide solution viscosity range and fast response speed. During the coating process, solvent properties play important roles in the formation of perovskite films, which further affects the device performance. This review introduces the structure and principle of the slot-die coater, and summarizes the research progress of SDC based perovskite solar cells and modules. Notably, the effects of physical properties such as rheological properties and evaporation rate of different solvents on the slot-die coating process and crystallization process are highlighted. Finally, challenges and opportunities in the commercialization of perovskite solar cells are also discussed.