Researchers at the Technical Institute of Physics and Chemistry (TIPC) in China, together with research groups at Tianjin University and the University of California, have realized the fabrication of high-quality two-dimensional perovskite nanowire arrays, which exhibit ultra-sensitive photodetection.

Through controlling the dewetting dynamics on the asymmetric-wettability topographical interface, the researchers have realized the controllable growth of single-crystalline 2D-perovskite nanowires. These nanowires are self-organized layer-by-layer into quantum wells with alternating conductive perovskite layers and insulating organic cations.

Researchers at the Moscow State University named after MV Lomonosov, in cooperation with scientists from the Kurchatov Synchrotron Radiation Center, explained the key mechanisms of interaction of hybrid perovskites with solvents and based on the results obtained, suggested new approaches to obtaining a perovskite light-absorbing layer of thin-film solar cells from weakly coordinating aprotic solvents.

The scheme of transformations of perovskite components in solution proposed by the authors of the study

To apply thin films of perovskite from solutions, two solvents are usually used: dimethylsulfoxide and dimethylformamide. However, earlier work of MSU scientists showed that crystallization from them proceeds through the formation of intermediate compounds – crystal solvates, which can degrade the morphology and functional properties of the perovskite layer.