Perovskite Light Emitting Diodes Using Covalent Organic Polymers as Hole Injection Layers

Abstract：Halide perovskite(ABX 3 )quantum dots and their light-emitting devices have the charac• teristics of high color purity，high luminous efficiency，and tunability in the visible light range.In recent years，they have shown great potential in lighting，display and other fields.However，the sta• bility of perovskite quantum dot light-emitting diodes (PeQLEDs)is becoming the biggest obstacle to its commercial application.In addition to the stability of the perovskite light-emitting layer itself， the water-oxygen stability of the transport layer cannot be ignored.This work introduces a novel PeQLEDs that utilize an azole-based monomer-synthesized organic covalent polymer material (COP-