The development of high molecular weight phosphorescent materials prepared for low-cost solution-processing applied in efficient light-outputting devices is to date still behind the expectations in both, color purity and device efficiency.In our current approach, we describe the synthesis and characterization of conjugated main-chain iridium(III) complexes, that are functionalized with different fluorene-type comonomers. The different heteroleptic Ir(III) emitters are designed to promote orange to red light emission and to support hole trapping at the on-chain complexes. Using both, either a straight-forward Yamamoto C-C coupling reaction or a Suzuki coupling protocol, allows to further modify the Ir(III) emitters with respective fluorene- and fluorenone-based counterparts. The on-chain Ir(III) emitter sites thus serve to transport holes and electrons due to their p- and n-type nature and are therefore serving as bipolar on-chain charge acceptors. The application of such phosphorescent copolymers in efficient light-emitting devices will moreover be discussed.

Phosphorescent copolymers for illumination applications

244th National Meeting (2012)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.