High-Performance Quasi-Two-Dimensional CsPbBrCl:PEABr Perovskite Sky-Blue LEDs with an Interface Modification Layer.

This paper elucidates the increased luminescence efficiency of CsPbBrCl sky-blue perovskite light-emitting diodes (PeLEDs) achieved through the interface modification of 3,4 ethylenedioxythiophene (PEDOT):polystyrene sulfonic acid (PSS)/quasi-two-dimensional (QTD) perovskite using CsCl and CsBr materials, respectively. QTD films were fabricated using ratios of CsPbBrCl doped with phenethylamine hydrobromide (PEABr) at 60%, 80%, and 100%. The solvent dimethyl sulfide (CHOS) was employed under the excitation of ambient and 365-nm laser lights.