Methylammonium‐Free Ink for Low‐Temperature Crystallization of α‐FAPbI3 Perovskite (Adv. Energy Mater. 30/2024)

α-FAPbI3 Perovskite The image represents the low-temperature phase transition from hexagonal δ-FAPbI3 to cubic α-FAPbI3 under the assistance of PbCl2 and MPSO. The near side of the court represents yellow δ phase, while the black far side represents black α phase. Ballboys of PbCl2 and MPSO work together to lower down the net (energy barrier) to let the ball pass. More in article 2400932, Meng Zhang, Martin A. Green, Xiaojing Hao, and co-workers.