Pure Hydrocarbon Hosts for ≈100% Exciton Harvesting in Both Phosphorescent and Fluorescent Light‐Emitting Devices

作者：Lin‐Song Cui, Yue‐Min Xie, Ya‐Kun Wang, Cheng Zhong, Yali Deng, Xiang‐Yang Liu, Zuo‐Quan Jiang, Liang‐Sheng Liao · 发表于：Advanced Materials · 年份：2015 · DOI：10.1002/adma.201501376 · 被引用次数：181 · 研究领域：Organic Light-Emitting Diodes Research、Organic Electronics and Photovoltaics、Luminescence and Fluorescent Materials

Two novel pure hydrocarbon compounds, SF33 and SF34, are designed with high triplet energies and stabilities. The efficiency of an SF34/FIrpic-based device is as high as 22.0%. Moreover, SF33 and SF34 are also used as hosts for thermally activated delayed fluorescence organic light-emitting diodes and achieve external quantum efficiencies in excess of 20.8% and 22.3%, respectively. The pure hydrocarbon host shows a much longer device lifetime than the traditional host 4,4′-di(N-carbazolyl)biphenyl.