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Aromatic‐Imide‐Based Thermally Activated Delayed Fluorescence Materials for Highly Efficient Organic Light‐Emitting Diodes
Author(s) -
Li Meng,
Liu Yanwei,
Duan Ruihong,
Wei Xiaofang,
Yi Yuanping,
Wang Ying,
Chen ChuanFeng
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201704435
Subject(s) - imide , photoluminescence , oled , materials science , thermal stability , fluorescence , dopant , acceptor , diode , quantum efficiency , photochemistry , optoelectronics , doping , chemistry , polymer chemistry , nanotechnology , organic chemistry , optics , physics , layer (electronics) , condensed matter physics
Aromatic‐imide‐based thermally activated delayed fluorescence (TADF) materials with a twisted donor–acceptor–donor skeleton were efficiently synthesized and exhibited excellent thermal stability and high photoluminescence quantum yields. The small Δ E ST value (<0.1 eV) along with the clear temperature‐dependent delayed component of their transient photoluminescence (PL) spectra demonstrated their excellent TADF properties. Moreover, the performance of organic light‐emitting diodes in which TADF materials AI‐Cz and AI‐TBCz were used as dopants were outstanding, with external quantum efficiencies up to 23.2 and 21.1 %, respectively.