A novel furo[3,2-c]pyridine-based iridium complex for high-performance organic light-emitting diodes with over 30% external quantum efficiency
作者:Zhimin Yan、Yanping Wang、Jiaxiu Wang、Yue Wang、Junqiao Ding、Lixiang Wang
DOI:10.1039/c7tc03937a
日期:——
A novel furo[3,2-c]pyridine based Ir complex, namely (pfupy)2Ir(acac), has been developed by replacing sulfur with oxygen in the C^N ligand. Compared with the thiophene-containing (pthpy)2Ir(acac), the LUMO level is elevated while the HOMO level keeps almost unchanged for the resultant furan-containing (pfupy)2Ir(acac). As a consequence, the emissive maximum is blue-shifted from 556 nm of (pthpy)2Ir(acac)
一种新的基于呋喃[3,2-c]吡啶的Ir配合物,即(pfupy)2Ir(acac),已通过在C ^ N配体中用氧替代硫而得到开发。与含噻吩的(pthpy)2Ir(acac)相比,LUMO含量升高,而HOMO含量几乎保持不变。结果,发射最大值从(pthpy)2Ir(acac)的556 nm蓝移到(pfupy)2Ir(acac)的538 nm,同时提高了0.80的光致发光量子产率。基于(pfupy)2Ir(acac)的相应器件无需任何外耦合技术即可实现创纪录的30.5%(110.5 cd / A)的外部量子效率(EQE)。即使在1000和5000 cd / m2的亮度下,EQE仍分别保持在26.6%(96.4 cd / A)和25.6%(92.7 cd / A),表明效率下降缓慢。