One of the key advantages of OLEDs is that they can potentially be produced entirely by solution processes, more suitable for low cost and large area displays, compared to the conventional vacuum deposition. Here, we investigated an approach based on the thiol-ene click chemistry to overcome the solvent penetration issue in solution processed multilayer OLEDs. A generally applicable binder-type crosslinking strategy was designed. Compared to conventional crosslinking strategies, the devised bicomponent system renders synthetically simple and much faster crosslinking by means of thermal-assisted UV irradiation. While most thiol-ene systems in other applications operate on polymeric systems, our strategy has been optimized for the contemporary small-molecule-based OLED devices. Results have shown that our system could achieve a considerable crosslinking degree and &gt;85% solvent resistance within 10 minutes.<br/>Upon successful development, the devised strategy could be readily and universally applicable to widely used OLED materials to facilitate the development of solution-processable OLEDs.

Crosslinking chemistry for solution processable multilayer organic light-emitting diodes

ACS Fall 2021

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