High‐Oriented SnO 2 Nanocrystals for Air‐Processed Flexible Perovskite Solar Cells with an Efficiency of 23.87%

. In parallel, the propitious interfacial lattice arrangement attenuates the formation of micro-strain inside perovskite films, maintaining 92.5% of their initial performance after 10 000 bending cycles with a curvature radius of 6 mm.