期刊
ADVANCED MATERIALS
卷 31, 期 21, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201808102
关键词
ancillary ligands; chemical design; deep-blue iridium complexes; horizontally oriented emitting dipoles; organic light-emitting dipoles
类别
资金
- National Research Foundation (NRF) grant - Ministry of Science and ICT (MSIT) [2017R1A2A1A05022985, 2018R1A2A1A05078734]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10048317] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2017R1A2A1A05022985, 21A20151513130, 21A20151713274] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Deep-blue emitting Iridium (Ir) complexes with horizontally oriented emitting dipoles are newly designed and synthesized through engineering of the ancillary ligand, where 2 ',6 '-difluoro-4-(trimethylsilyl)-2,3 '-bipyridine (dfpysipy) is used as the main ligand. Introduction of a trimethylsilyl group at the pyridine and a nitrogen at the difluoropyrido group increases the bandgap of the emitter, resulting in deep-blue emission. Addition of a methyl group (mpic) to a picolinate (pic) ancillary ligand or replacement of an acetate structure of pic with a perfluoromethyl-triazole structure (fptz) increases the horizontal component of the emitting dipoles in sequence of mpic (86%) > fptz (77%) > pic (74%). The organic light-emitting diode (OLED) using the Ir complex with the mpic ancillary ligand shows the highest external quantum efficiency (31.9%) among the reported blue OLEDs with a y-coordinate value lower than 0.2 in the 1931 Commission Internationale de L'Eclairage (CIE) chromaticity diagram.
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。
推荐
暂无数据