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- Title
Intermolecular Charge‐Transfer Transition Emitter Showing Thermally Activated Delayed Fluorescence for Efficient Non‐Doped OLEDs.
- Authors
Shi, Yi‐Zhong; Wang, Kai; Li, Xing; Dai, Gao‐Le; Liu, Wei; Ke, Ke; Zhang, Ming; Tao, Si‐Lu; Zheng, Cai‐Jun; Ou, Xue‐Mei; Zhang, Xiao‐Hong
- Abstract
Abstract: A novel molecular model of connecting electron‐donating (D) and electron‐withdrawing (A) moieties via a space‐enough and conjugation‐forbidden linkage (D‐Spacer‐A) is proposed to develop efficient non‐doped thermally activated delayed fluorescence (TADF) emitters. 10‐(4‐(4‐(4,6‐diphenyl‐1,3,5‐triazin‐2‐yl) phenoxy) phenyl)‐9,9‐dimethyl‐9,10‐dihydroacridine (DMAC‐o‐TRZ) was designed and synthesized accordingly. As expected, it exhibits local excited properties in single‐molecule state as D‐Spacer‐A molecular backbone strongly suppress the intramolecular charge‐transfer (CT) transition. And intermolecular CT transition acted as the vital radiation channel for neat DMAC‐o‐TRZ film. As in return, the non‐doped device exhibits a remarkable maximum external quantum efficiency (EQE) of 14.7 %. These results prove the feasibility of D‐Spacer‐A molecules to develop intermolecular CT transition TADF emitters for efficient non‐doped OLEDs.
- Subjects
INTERMOLECULAR forces; DELAYED fluorescence; CHARGE transfer; ORGANIC light emitting diodes; ACETONITRILE
- Publication
Angewandte Chemie, 2018, Vol 130, Issue 30, p9624
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201804483