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Chiral dual-core AIEgens based-on through-space coupling for high-performance organic light-emitting diodes with little efficiency roll-off
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  • Lifen Chen,
  • Mingjia Deng,
  • Shao-Yun Yin,
  • Yu Fu,
  • Yingxiao Mu,
  • Jia-Xiong Chen,
  • Lingyun Cui ,
  • Shaomin Ji,
  • Yanping Huo,
  • Hao-Li Zhang
Lifen Chen
Guangdong University of Technology
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Mingjia Deng
Guangdong University of Technology
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Shao-Yun Yin
Guangdong University of Technology
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Yu Fu
Guangdong University of Technology
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Yingxiao Mu
Guangdong University of Technology

Corresponding Author:yxmu@gdut.edu.cn

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Jia-Xiong Chen
Guangdong University of Technology
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Lingyun Cui
Beijing City University
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Shaomin Ji
Guangdong University of Technology
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Yanping Huo
Guangdong University of Technology
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Hao-Li Zhang
Guangdong University of Technology
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Abstract

In this work, we demonstrate a chiral dual-core strategy for the design of high-performance organic circularly polarized aggregation-induced emission luminogens (AIEgens), which features of connecting two thermally activated delayed fluorescence (TADF) luminophore with chiral linkage that allows efficient through-space coupling (TSC) to occur. Using this strategy, a pair of dual-core enantiomers, R/S-DNKP, were designed and synthesized by linking two benzophenone derivatives with a 1,1’-bi-2-naphthol unit. Compared to the mono-core counterpart NKP, the dual-core emitters exhibited a much higher photoluminescence quantum yields of 94%. Moreover, benefited from their chiral helical folding configurations, the R/S-DNKP enantiomers exhibited a high luminescence dissymmetry factor (|glum|) value up to 1.3×10-3 in film states. Notably, the electroluminescence devices based on the R/S-DNKP enantiomers achieved external quantum efficiency values of 21.5% and 19.7% with little roll-off. It is believed that this molecular design strategy will pave new routes for the development of high-performance chiral emitters for future organic photonic devices.
15 Nov 2023Submitted to Aggregate
16 Nov 2023Submission Checks Completed
16 Nov 2023Assigned to Editor
16 Nov 2023Reviewer(s) Assigned