High performance perovskite solar cell via multi-cycle low temperature processing of lead acetate precursor solutions.

A lead acetate-based precursor, as a lead source in CH3NH3PbI3 perovskite, showed potential in rapidly (<60 seconds) forming homogeneous films with a very smooth interface and large grain growth at relatively low temperatures via multi-step coating. Cells based on this method exhibited high power conversion efficiency beyond 17% with good reproducibility.