Solar Cells: Self‐Organized Superlattice and Phase Coexistence inside Thin Film Organometal Halide Perovskite (Adv. Mater. 8/2018)

Atomic configurations of superlattices of an organometal halide perovskite layer composed of a mixture of tetragonal and cubic phases are reported by Tae Woong Kim, Satoshi Uchida, Hiroshi Segawa, and co-workers in article number 1705230. The tetragonal and cubic phases are found to coexist at room temperature, and superlattices composed of a mixture of tetragonal and cubic phases are found to be self-organized without a compositional change. The fundamental crystallographic information of the organometal halide perovskite is shown and their new possibilities as promising materials for various applications are demonstrated.