Solution-processable carbazole-based conjugated dendritic hosts for power-efficient blue-electrophosphorescent devices

Abstract

(Figure Presented) A novel class of hosts suitable for solution processing has been developed based on a conjugated dendritic scaffold. By increasing the dendron generation, the highest occupied molecular orbital (HOMO) energy level can be tuned to facilitate hole injection, while the triplet energy remains at a high level, sufficient to host high-energy-triplet emitters. A power-efficient blue-electrophosphorescent device based on H2 (see figure) is presented. © 2009 WILEY-VCH Verlag GmbH & Co. KGaA.