Crosslinkable hole-transporting polymers by palladium-catalyzed C—N-coupling reaction

Abstract

Combination of spin-coating and crosslinking allows low-cost fabrication of large area displays with multiple layers by simple solution processing. For this purpose, a series of novel crosslinkable polymers containing hole-transporting triarylamine units in the main chain were synthesized via palladium-catalyzed C—N-coupling reaction. Additionally, they contain varying amounts of polymerizable oxetane groups as side chains. The polymers were photo-crosslinked to yield absolutely insoluble networks. Thin films were used as hole-transport layer in two-layer blue light-emitting diodes.