Fig. 4: Additive engineering for high-efficiency and stable quasi-2D perovskite films.
From: High-performance quasi-2D perovskite light-emitting diodes: from materials to devices
a Energy schematic diagram of 40% PEABr with and without a “crown” additive. b PLQY versus PEABr ratio for the quasi-2D perovskite films with and without the “crown” additive. c Schematic illustrating imperfect edges of PEA2Cs2Pb3Br10 perovskite films and the reaction pathway to produce superoxide under photoexcitation. d Corresponding PLQYs of quasi-2D perovskite films treated with different molecules. e PL stability for the control (blue) and edge-stabilized (red) quasi-2D perovskites before and after (in gray) measurement. Panels a and b are reprinted from ref. 78 with permission from Springer Nature. Panels c–e are reprinted from ref. 79 with permission from Springer Nature
