Citation: Liang Zhang, Yin-Feng Wang, Meng Li, Qing-Yu Gao, Chuan-Feng Chen. Quinoline-based aggregation-induced delayed fluorescence materials for highly efficient non-doped organic light-emitting diodes[J]. Chinese Chemical Letters, ;2021, 32(2): 740-744. doi: 10.1016/j.cclet.2020.07.041 shu

Quinoline-based aggregation-induced delayed fluorescence materials for highly efficient non-doped organic light-emitting diodes

Liang Zhang ^{a, b} ,
Yin-Feng Wang ^{a, c} ,
Meng Li ^a ,
Qing-Yu Gao ^{b, *,} ,
Chuan-Feng Chen ^{a, c, *,}

a.
Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
b.
College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221116, China
c.
University of Chinese Academy of Sciences, Beijing 100049, China

gaoqy@cumt.edu.cn

cchen@iccas.ac.cn

Received Date: 10 June 2020
Revised Date: 10 July 2020
Accepted Date: 24 July 2020
Available Online: 26 July 2020

Figures(7)

Three new emitters, namely 10, 10'-(quinoline-2, 8-diyl)bis(10H-phenoxazine) (Fene), 10, 10'-(quinoline-2, 8-diyl)bis(10H-phenothiazine) (Fens) and 10, 10'-(quinoline-2, 8-diyl)bis(9, 9-dimethyl-9, 10-dihydroacridine) (Yad), featuring quinoline as a new electron acceptor have been designed and conveniently synthesized. These emitters possessed small singlet–triplet splitting energy (ΔE_st) and twisted structures, which not only endowed them show thermally activated delayed fluorescence (TADF) properties but also afforded a remarkable aggregation-induced emission (AIE) feature. Moreover, they also showed aggregation-induced delayed fluorescence (AIDF) property and good photoluminescence (PL) property, which are the ideal emitters for non-doped organic light-emitting diodes (OLEDs). Furthermore, high-performance non-doped OLEDs based on Fene, Fens and Yad were achieved, and excellent maximum external quantum efficiencies (EQE_max) of 14.9%, 13.1% and 17.4%, respectively, were obtained. It was also found that all devices exhibited relatively low turn-on voltages ranging from 3.0 V to 3.2 V probably due to their twisted conformation and the AIDF properties. These results demonstrated the quinoline-based emitters could have a promising application in non-doped OLEDs.
- Quinoline,
- Aggregation-induced emission,
- Thermally activated delayed fluorescence,
- Non-doped organic light-emitting diode
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