Molecular additives are frequently employed to enhance the performance of perovskite light-emitting diodes (PeLEDs), either through surface defect passivation or crystal growth control. In general, such passivation is attained through the chelation of the molecular additive to a defective Pb site along a lattice plane. Unfortunately, nano-crystallites often display multiple lattice planes and defects that a single additive is inadequate in passivating. Here, we report a dual additive system, com