2D Perovskites: Coordination Engineering of Single‐Crystal Precursor for Phase Control in Ruddlesden–Popper Perovskite Solar Cells (Adv. Energy Mater. 16/2020)

In article number 1904050, Chaochao Qin, Alex K.-Y. Jen, Kai Yao and co-workers describe a generic guideline for fine tuning colloidal properties of 2D perovskites via coordination engineering of the single-crystal precursor solution. In nonpolar co-solvent media, the derived colloidal templates prefer to grow along the vertical direction with a narrow phase variation, elucidating the critical role of colloidal chemistry in low-dimensional perovskite solar cells.