In inverted perovskite solar cells (PSCs). high-quality perovskite film grown on hole-transporting material (HTM) with pinhole-free coverage and a large grain size is crucial for high efficiency. Here. we report on the growth of pinhole-free and large grain CH3NH3PbI3 crystals favored by a hydrophobic small molecular HTM. https://www.ngetikin.com/special-pick-MVP4-Moisture-Vapor-Protection-Anti-Fracture-and-Noise-Reduction-Membrane-special-save/