Iridium(III) Complexes of a Dicyclometalated Phosphite Tripod Ligand: Strategy to Achieve Blue Phosphorescence Without Fluorine Substituents and Fabrication of OLEDs

摘要

Organic light-emitting diodes (OLEDs) based on heavy transition-metal complexes are playing a pivotal role in next generation of, for example, flat panel displays and solid-state lighting. The readily available, Os~(II)-, Pt~(II)-, and in particular Ir~(III)-based phosphorescence complexes grant superior advantage over fluorescent materials. This is mainly due to heavy-atom-induced spin-orbit coupling, giving effective harvesting of both singlet and triplet excitons.