Fig. 1: The workflow of the study and aging test result over time.
From: How machine learning can help select capping layers to suppress perovskite degradation

a Schematic overview of this study, aimed at developing design rules for capping layer of perovskite solar cells. b the raw image changes for tetrapropylammonium iodide (TPAI)-capped, phenyltriethylammonium iodide (PTEAI)-capped, which have similar molecular weights, and bare MAPbI3 films.