期刊
ADVANCED MATERIALS
卷 32, 期 48, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202003885
关键词
intramolecular spatial charge transfer; organic light‐ emitting diodes; thermally activated delayed fluorescence; unconjugated system
类别
资金
- National Key R&D Program of China [2016YFB0400700]
- National Natural Science Foundation of China [51773141, 51873139, 21572152]
- Natural Science Foundation of Jiangsu Province of China [BK20181442]
- Collaborative Innovation Centre of Suzhou Nano Science Technology
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- 111 Project of The State Administration of Foreign Experts Affairs of China
In this work, two novel thermally activated delayed fluorescence (TADF) emitters, 2tDMG and 3tDMG, are synthesized for high-efficiency organic light-emitting diodes (OLEDs), The two emitters have a tilted face-to-face alignment of donor (D)/acceptor (A) units presenting intramolecular noncovalent interactions. The two TADF materials are deposited either by an evaporation-process or by a solution-process, both of them leading to high OLED performance. 2tDMG used as the emitter in evaporation-processed OLEDs achieves a high external quantum efficiency (EQE) of 30.8% with a very flat efficiency roll-off of 7% at 1000 cd m(-2). The solution-processed OLEDs also display an interesting EQE of 16.2%. 3tDMG shows improved solubility and solution processability as compared to 2tDMG, and thus a high EQE of 20.2% in solution-processed OLEDs is recorded. The corresponding evaporation-processed OLEDs also reach a reasonably high EQE of 26.3%. Encouragingly, this work provides a novel strategy to address the imperious demands for OLEDs with high EQE and low roll-off.
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