A Simple Carbazole/Oxadiazole Hybrid Molecule: An Excellent Bipolar Host for Green and Red Phosphorescent OLEDs

作者：Youtian Tao, Qiang Wang, Chuluo Yang, Qi Wang, Zhiqiang Zhang, Taotao Zou, Jingui Qin, Dongge Ma · 发表于：Angewandte Chemie International Edition · 年份：2008 · DOI：10.1002/anie.200803396 · 被引用次数：464 · 研究领域：Organic Light-Emitting Diodes Research、Conducting polymers and applications、Organic Electronics and Photovoltaics

An enhanced performance: Electroluminescent devices incorporating a simple carbazole/oxadiazole hybrid as a host for dopants show maximum external quantum efficiencies (ηEQE) as high as 20.2 % for green and 18.5 % for deep red electrophosphorescence (see picture, J=current density). The host can be conveniently prepared and has good thermal and morphological stabilities and a high triplet energy level.