Tuning 2D Perovskite Passivation: Impact of Electronic and Steric Effects on the Performance of 3D/2D Perovskite Solar Cells (Adv. Energy Mater. 45/2023)

3D/2D Perovskite Solar Cells In article number 2302038, Xiao‐Xin Gao, Paul J. Dyson, Selcuk Yerci, Mohammad Khaja Nazeeruddin, Gorkem Gunbas and co‐workers systematically screen a series of halogenated phenylethylammonium iodide salts to elucidate the impact of substituent position on 2D perovskite passivation and device efficiency. Notably, meta‐substituted salts outperform their counterparts (PCE >%23) owing to their lower formation energies and higher interfacial dipoles.