4.7 Article

Sublimable cationic iridium(iii) complexes with large steric hindrance for high-performance organic light-emitting diodes

期刊

DALTON TRANSACTIONS
卷 48, 期 26, 页码 9669-9675

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/c9dt00495e

关键词

-

资金

  1. National Science Fund of China [U1601651, 61890942, 51525304]
  2. National Key Research and Development Program of China [2017YFA0204501, 2015CB655002]

向作者/读者索取更多资源

A series of novel sublimable cationic iridium(iii) complexes with 2-phenylquinoline as the major cyclometalated ligand and imidazole-type ancillary ligands were designed and synthesized. It is found that complexes containing active hydrogen atoms in the ancillary ligands exhibited poor electroluminescence performance. By introducing a phenyl group into the ancillary ligands to protect the active hydrogen atoms and simultaneously increase the steric hindrance of complexes, the device performance was drastically improved, due to the reduced negative effects of the active hydrogen atoms and the decreased intermolecular interaction and aggregation. We obtained high efficiency devices with a superior external quantum efficiency of 14.7%, high brightness, a low turn-on voltage of only 2.4 V and low efficiency roll-off at high luminance, the best results for yellow OLEDs based on sublimable cationic iridium(iii) complexes.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据