Ultrastable Perovskites: Strain‐Mediated Phase Stabilization: A New Strategy for Ultrastable α‐CsPbI₃ Perovskite by Nanoconfined Growth (Small 21/2019)

In article number 1900219, Donghwa Lee, Jooho Moon, and co-workers develop an approach to stabilize α-CsPbI3 perovskite through strain engineering, whereby CsPbI3 perovskite is confined by a vertically aligned nanoporous template. By imposing a strain on the perovskite lattice, the ultra-stable black α-CsPbI3 with its desirable optoelectrical properties is obtained. This universally applicable template-based stabilization strategy provides in-depth insights on the strain-mediated phase transition mechanism in all-inorganic perovskite.