| Modulating optoelectronic properties of red TADF emitters based on acenaphtho[1,2-b]quinoxaline-3,4-dicarbonitrile through isomeric engineering | |
| Liu, Bo1; Chen, Wen-Cheng1; Zhang, Rong2; Liu, Qiang1; Wei, Huaixin2; Wu, Wei-Le1; Xing, Longjiang1; Wang, Ruicheng1; Liu, Yuan1; Ji, Shaomin1; Zhang, Hao-Li1,3; Huo, Yanping1 | |
| 2023-08-01 | |
| Source Publication | DYES AND PIGMENTS Impact Factor & Quartile |
| ISSN | 0143-7208 |
| Volume | 216 |
| Abstract | Developing new electron acceptors with high rigidity and structural adjustability is significant for realizing efficient long-wavelength thermally activated delayed fluorescence (TADF) emitters. Herein, a new acceptor group, acenaphtho[1,2-b]quinoxaline-3,4-dicarbonitrile (AQCN), featuring a π-extended, rigid skeleton with high electron affinity, is developed for the construction of red TADF dyes. Two red light-emitting regioisomers, LB-Y and LB-T, featuring a Y-shape and T-shape D-A-D molecular configuration, respectively, were prepared by adjusting the relatively substituting position of two triphenylamine electron-rich moieties on AQCN. Through the isomeric engineering, it is found that LB-Y shows a high degree of molecular rigidity, matched excited-state energy level alignment, and decent interplay among singlet charge transfer excited state (1CT), triplet locally excited state (3LE) and triplet hybridized local and charge transfer excited state (3HLCT). Therefore, LB-Y has a higher radiative transition rate (8.36 × 107 s−1), reverse intersystem crossing rate (1.02 × 105 s−1), and better electroluminescent performances (λEL = 614 nm, EQEmax = 4.1%) than LB-T (λEL = 612 nm, EQEmax = 2.6%). This study reports a promising electron acceptor and provides an efficient approach to modulating the optoelectronic properties of red TADF dyes. © 2023 |
| Keyword | Charge transfer Electron affinity Electrons Excited states Fluorescence Organic light emitting diodes (OLED) Acenaphtho[1,2-b]pyrazine-3,4-dicarbonitrile Electron-acceptor Lightemitting diode Optoelectronics property Organic light-emitting Organic light-emitting diode Pyrazines Quinoxalines Red emissions Thermally activated delayed fluorescences |
| Publisher | Elsevier Ltd |
| DOI | 10.1016/j.dyepig.2023.111314 |
| Indexed By | EI |
| Language | 英语 |
| EI Accession Number | 20231714005644 |
| EI Keywords | Rigidity |
| EI Classification Number | 714.2 Semiconductor Devices and Integrated Circuits ; 741.1 Light/Optics ; 801 Chemistry ; 802.2 Chemical Reactions ; 931.3 Atomic and Molecular Physics ; 931.4 Quantum Theory ; Quantum Mechanics ; 951 Materials Science |
| Original Document Type | Journal article (JA) |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.lzu.edu.cn/handle/262010/500919 |
| Collection | 兰州大学 化学化工学院 |
| Corresponding Author | Chen, Wen-Cheng; Wei, Huaixin; Zhang, Hao-Li; Huo, Yanping |
| Affiliation | 1.School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou; 510006, China; 2.School of Chemistry and Life Science, Suzhou University of Science and Technology, Jiangsu, Suzhou; 215009, China; 3.College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou; 730000, China |
| Corresponding Author Affilication | College of Chemistry and Chemical Engineering |
| Recommended Citation GB/T 7714 | Liu, Bo,Chen, Wen-Cheng,Zhang, Rong,et al. Modulating optoelectronic properties of red TADF emitters based on acenaphtho[1,2-b]quinoxaline-3,4-dicarbonitrile through isomeric engineering[J]. DYES AND PIGMENTS,2023,216. |
| APA | Liu, Bo.,Chen, Wen-Cheng.,Zhang, Rong.,Liu, Qiang.,Wei, Huaixin.,...&Huo, Yanping.(2023).Modulating optoelectronic properties of red TADF emitters based on acenaphtho[1,2-b]quinoxaline-3,4-dicarbonitrile through isomeric engineering.DYES AND PIGMENTS,216. |
| MLA | Liu, Bo,et al."Modulating optoelectronic properties of red TADF emitters based on acenaphtho[1,2-b]quinoxaline-3,4-dicarbonitrile through isomeric engineering".DYES AND PIGMENTS 216(2023). |
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