二喹喔啉并吩嗪类延迟荧光材料的合成及电致发光性质

doi:10.11896/cldb.24080087

材料导报

2026, Vol. 40

Issue (1): 24080087-6 https://doi.org/10.11896/cldb.24080087

高分子与聚合物基复合材料

二喹喔啉并吩嗪类延迟荧光材料的合成及电致发光性质

唐凌君¹, 章博¹, 兰昊¹, 曹远哲¹, 袁国², 胡英元¹, 赵鑫^1,*

1 苏州科技大学化学与生命科学学院,江苏苏州 215009
2 苏州大学功能纳米与软物质研究院江苏省碳基功能材料与器件重点实验室,江苏苏州 215123

Synthesis and Electroluminescent Properties of Diquinoxalino Phenazine-based Delayed Fluorescence Material

TANG Lingjun¹, ZHANG Bo¹, LAN Hao¹, CAO Yuanzhe¹, YUAN Guo², HU Yingyuan¹, ZHAO Xin^1,*

1 School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu, China
2 Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, Jiangsu, China

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摘要以具有大共轭平面、强刚性、强吸电子特性的二喹喔啉并[2,3-a:2′,3′-c]吩嗪(TQC)为受体单元,在其2、3、8、9、14、15位引入六个三苯胺(TPA)作供体,设计合成了一种结构新颖的红色热激活延迟荧光(Thermally activated delayed fluorescence,TADF)材料HTPA-TQC。研究表明,HTPA-TQC具有扭曲的分子结构(二面角50°左右),前线分子轨道分离与交盖程度适宜,具有较小的单重态和三重态能级差(ΔE_ST)以及较大的振子强度(f )。瞬态光谱表明,HTPA-TQC的延迟荧光寿命为7.85 μs,具有典型的延迟荧光特性。紫外光谱和溶剂极性实验表明,HTPA-TQC具有显著的分子内电荷转移(ICT)效应。其光致发射波长达到579 nm,光致发光量子产率(PLQY)达到65.38%。基于HTPA-TQC的器件成功实现了红光发射,电致发射波长达到608 nm,最大外量子效率(EOE_max)为0.19%。

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关键词: 延迟荧光二喹喔啉并吩嗪有机发光二极管电致发光

Abstract: Anovel red thermally activated delayed fluorescence (TADF) material, HTPA-TQC, was designed and synthesized by incorporating six triphenylamine (TPA) donor units at 2, 3, 8, 9, 14, and 15 positions of the receptor unit, diquinoxalino[2, 3-a:2′, 3′-c]phenazine (TQC), which possesses a large conjugated plane, strong rigidity, and strong electron-withdrawing properties. Studies show that HTPA-TQC exhibits twisted molecular structure with a dihedral angle of approximately 50°, and the separation and overlap of frontier molecular orbitals are well-ba-lanced. Consequently, it possesses a small singlet-triplet energy gap (ΔE_ST) and a high oscillator strength (f ). Transient spectroscopy reveals that the delayed fluorescence lifetime of HTPA-TQC is 7.85 μs, indicating typical delayed fluorescence characteristics. UV spectroscopy and solvent polarity experiments demonstrate a significant intramolecular charge transfer (ICT) effect in HTPA-TQC. Its photoluminescence emission wavelength reaches 579 nm, with a photoluminescence quantum yield (PLQY) of 65.38%. Devices based on HTPA-TQC successfully achieved red-light emission, with an emission wavelength of 608 nm and a maximum external quantum efficiency (EOE_max) of 0.19%.

Key words: delayed fluorescence diquinoxalino[2,3-a:2′,3′-c]phenazine organic light-emitting diode electroluminescence

出版日期: 2026-01-10 发布日期: 2026-01-09

ZTFLH:

O621.22

基金资助: 国家自然科学基金(21905048);江苏省研究生研究创新项目(KYCX24_3462)

通讯作者: * 赵鑫,苏州科技大学教授、硕士研究生导师。目前主要从事有机光电功能材料的设计、合成及应用等方面的研究。zhaoxinsz@usts.edu.cn

作者简介: 唐凌君,苏州科技大学化学与生命科学学院硕士研究生,在赵鑫教授指导下研究有机光电材料的合成与性能。

引用本文:

唐凌君, 章博, 兰昊, 曹远哲, 袁国, 胡英元, 赵鑫. 二喹喔啉并吩嗪类延迟荧光材料的合成及电致发光性质[J]. 材料导报, 2026, 40(1): 24080087-6.
TANG Lingjun. Synthesis and Electroluminescent Properties of Diquinoxalino Phenazine-based Delayed Fluorescence Material. Materials Reports, 2026, 40(1): 24080087-6.

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https://www.mater-rep.com/CN/10.11896/cldb.24080087 或 https://www.mater-rep.com/CN/Y2026/V40/I1/24080087

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