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Feature Article

J. Mater. Chem., 2008, 18, 4495 - 4509, DOI: 10.1039/b804977g

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

Fei Huang, Yen-Ju Cheng, Yong Zhang, Michelle S. Liu and Alex K.-Y. Jen

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.

Graphical abstract image for this article (ID: b804977g)