CHNHPbI films prepared by combining 1- and 2-step deposition: how crystal growth conditions affect properties.

Perovskite solar cells continue to attract strong attention because of their unprecedented rate of power conversion efficiency increase. CHNHPbI (MAPbI) is the most widely studied perovskite. Typically one-step (1-s) or two-step (2-s) deposition methods are used to prepare MAPbI films.