Fig. 1. Formation of high-quality perovskite layers via antisolvent bathing.
a Schematic diagram representing R2R processing of perovskite layer. Each step of processing, considerations of each step, and timescales are presented in the figure. b Photographs of perovskite film after bathing in various antisolvents. The images were recorded as a video and captured at certain times. Final films were obtained by thermal annealing of the intermediate film after bathing for 20 s.