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

Ding, Junqiao; Zhang, Baohua; Lü, Jianhong; Xie, Zhiyuan; Wang, Lixiang; Jing, Xiabin; Wang, Fosong · Adv Mater · 2009

basic_science · Level V

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Abstract

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 is presented.