Breaking Electronic Insulation of Monocyclic Aromatic Spacers via Hydrazide‐Induced Orbital Coupling in Ruddlesden‐Popper Perovskites

) for large-area devices, the highest reported for quasi-2D RP PSCs. This study establishes a molecular design strategy that uses multifunctional hydrazide modules to overcome the electronic insulation of single-ring aromatic spacers, enabling robust and efficient RP PSCs.