Multifunctional FA‐Triflate Treatment for Efficiency and Reliability Enhancements of Quasi‐2D Perovskite Light‐Emitting Diodes (Adv. Funct. Mater. 23/2025)

Quasi‐2D PerovskiteLight‐Emitting Diodes In article number 2422368, Il‐Kyu Park and co‐workers report a new approach to simultaneously enhance the emission efficiency and stability of quasi‐2D perovskites by introducing FA‐Triflate. FA‐Triflate effectively suppresses the formation of lower dimensional phases, passivates intrinsic defects, and enhances humidity resistance by improving hydrophobicity. The light‐emitting diode with FA‐Triflate‐treated quasi‐2D perovskites shows an improvement in external quantum efficiency from 6.4 to 16.6%, along with a device lifetime extension of over 3,000%.