Fig. 2: The thick perovskite film fabricated by spray-coating and crystallization process.
From: Spray-coated perovskite hemispherical photodetector featuring narrow-band and wide-angle imaging
a The optical photographs of spray-coated perovskite (PEA2FA3Pb4I13) films deposited onto different substrates of different sizes and shapes. b The SEM image of the surface of the perovskite film on hemispherical substrate. c The cross-section SEM image of the perovskite film on curved substrate. d The time history of solid film formation ratio (the crystallization processes of different perovskites). e Schematic diagram of the solid film thickness during spray-coating and N2 flowing process. f The microscope images of the crystallization processes of different perovskites precursors drop-coated on the hot plate.
