Rotation-restricted thermally activated delayed fluorescence compounds for efficient solution-processed OLEDs with EQEs of up to 24.3% and small roll-off. Issue 44 (29th April 2020)

• Record Type: Journal Article
• Authors: Li, Kuofei; Zhu, Yunhui; Yao, Bing; Chen, Yuannan; Deng, Hao; Zhang, Qisheng; Zhan, Hongmei; Xie, Zhiyuan; Cheng, Yanxiang
• Is Part Of: Chemical communications. Volume 56:Issue 44(2020)
• Page Start: 5957
• Page End: 5960
• Publication Date: 2020-04-29
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/d0cc01738h
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : A sandwich-like chromophore, composed of two donors and an inserted acceptor, is hitched onto a single carbazole to yield an efficient TADF emitter with excellent electroluminescent performance. Abstract : Two triphenylamine or 4, 4′-di( tert -butyl)triphenylamine groups are introduced at the 1, 8-positions of 3, 6-di( tert -butyl)-9-(4-(4, 6-diphenyl-1, 3, 5-triazin-2-yl)phenyl)carbazole to yield two emitters containing a cofacial donor–acceptor–donor chromophore, which exhibit strong TADF characteristics dominated by through-space charge-transfer. The solution-processed OLEDs achieve maximum external quantum efficiencies of up to 17.4% and 24.3% with small efficiency roll-off rates.