Large-Area Perovskite Solar Cells Prepared by Solution-Shearing Using 2-Ethoxyethanol-Base Volatile Solvent

Currently, solution-shearing is a promising technique to generate a perovskite thin film over a large area in a scalable manner, which is an important factor for the commercialization of perovskite solar cells. Despite the improvement in PCE of state-of-the arts perovskite solar cells reaching >25%, most of research have utilized conventional high boiling point (Tb) solvents, which requires high processing temperature (i.e., substrate temperature above 150°C). High substrate temperature is undesirable for large-scale manufacturing as it degrades film properties. Therefore volatile, low Tb solvents should be developed to progress towards commercialization of perovskite solar cells. Here, we report the deposition of highly packed and uniform (FAPbI3)0.95(MAPbBr3)0.05 perovskite precursor solution dissolved in highly volatile 2-ethoxyethanol (2EE) solvent using N2 air-knife and anti-solvent treatment. Add n-cyclohexyl-2-pyrrolidone (CHP) additional solvent to control perovskite rapid nucleation and slowed crystal growth. The solution-shearing-coated perovskite solar cells (PSCs) was demonstrated which attaining a power conversion efficiency of 17.29% with 1.05 V of Voc and 23.81 mA/cm2 of Jsc.