Crosslinkable hole-transporting materials for solution processed polymer light-emitting diodes

摘要

One of the most challenging tasks in fabricating multilayer polymer light-emitting diodes(PLEDs)by solution processes is to avoid the interfacial mixing between different layers because most of the commercially available emissive and charge-transporting materials are soluble in common organic solvents.To overcome this difficulty,extensive efforts have been invested in developing novel crosslinkable hole-transporting materials(HTMs).After thermo-or photo-crosslinking,all these crosslinked HTMs possess very good solvent resistance which greatly facilitates the subsequent processing of the emitting layer.By taking advantage of these HTMs,high efficiency red-green-blue(RGB)-emitting PLEDs,as well as white-and quantum dot based PLEDs,have been realized.This article provides a brief overview of the recent development of crosslinkable HTMs and their unique advantages in enhancing the performance of LEDs.