HighlightsHigh quality and strongly oriented perovskite films are prepared by two step doctor blading in air.Methylammonium chloride induced low dimensional intermediate phase regulates the crystallization and orientation of the perovskite.Two step doctor bladed perovskite solar cells achieve a power conversion efficiency (PCE) of 23.14%, while 1.03 cm2PSCs and 10.93 cm2mini modules achieve PCEs of 21.20% and 17.54%, respectively.Supplementary InformationThe online version contains supplementary material available at 10.1007/s40820-023-01138-x.