Citation: Wang Tongtong, Hua Xiaochen, Yu Youjun, Yuan Yi, Fung Mankeung, Jiang Zuoquan. Design and Synthesis of Highly Efficient Blue Thermally Activated Delayed Fluorescence Molecules Based on Carbazole and 1, 3, 5-Triazine Units through Position Engineering[J]. Chinese Journal of Organic Chemistry, ;2019, 39(5): 1436-1443. doi: 10.6023/cjoc201810016 shu

Design and Synthesis of Highly Efficient Blue Thermally Activated Delayed Fluorescence Molecules Based on Carbazole and 1, 3, 5-Triazine Units through Position Engineering

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials, Soochow University, Suzhou 215123

Corresponding author: Fung Mankeung, mkfung@suda.edu.cn Jiang Zuoquan, zqjiang@suda.edu.cn
Received Date: 14 October 2018
Revised Date: 5 December 2018
Available Online: 9 May 2019
Fund Project: the National Natural Science Foundation of China 51873139Project supported by the National Natural Science Foundation of China (Nos. 21572152, 51873139)the National Natural Science Foundation of China 21572152

Figures(4)

Using carbazole as the donor motif, triazine as the acceptor motif, two thermally activated delayed fluorescence (TADF) molecules of m-CzTri and p-CzTri were designed and synthesized through efficient combination and position regulation. Both materials emit bright blue fluorescence with very small singlet-triplet splitting energy. Computational simulations show that the donor and acceptor groups are well separated from the highest occupied orbit (HOMO) and the lowest unoccupied orbit (LUMO). In addition, their thermal, electrochemical, photophysical, and device properties were tested. Among them, the color coordinates of organic light emitting diode (OLED) devices with m-CzTri as the emitter were (0.15, 0.25), and the external quantum efficiency was as high as 18%.
- thermal activated delayed fluorescence,
- carbazole,
- triazine,
- blue emitter,
- organic light emitting diodes
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