Dimensional phase transition for the controlled growth of α-FAPbI3 perovskite films

Abstract

Control of the lattice alignment within perovskite films is crucial to achieving stable and efficient devices. Now, the sublimation of volatile species from a two-dimensional perovskite enables the controlled growth of three-dimensional α-formamidinium lead iodide films. The highly orientated perovskite films yield a solar cell with good operational stability and device efficiency.