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结构工程的阿克里丁捐赠者,以优化蓝色热激活延迟光发射器的颜色纯度

Yixuan Jiang¹, Jing Jin², Huicai Ren³

¹Frontier Science Center for Smart Materials, College of Chemistry, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, China.

Chemistry (Weinheim an der Bergstrasse, Germany)

|May 5, 2024

概括

将电子吸收组引入9,9-二甲基-9,10-二亚克里丁 (DMAC) 捐赠体,可以提高热激活延迟光 (TADF) 发射器的颜色纯度. 这一战略提高了OLED应用的蓝色排放.

科学领域:

材料科学材料科学材料科学
有机电子有机电子
光物理学的光学物理学

背景情况:

9,9-二甲基-9,10-二亚克里丁 (DMAC) 是高性能热激活延迟光 (TADF) 发射器的关键电子供体.
基于DMAC的发射器经常表现出低于最佳的颜色纯度,特别是在蓝色光谱中,由于强大的电子捐赠特性.

研究的目的:

通过调节DMAC核心的电子捐赠强度来增强基于DMAC的TADF发射器的颜色纯度.
开发具有改进蓝色排放特性的新型TADF发射器.

主要方法:

通过引入吸收电子的和三甲基基组,合成了2,7-F-Ph-DMAC和2,7-CF3-Ph-DMAC的供体.
使用这些改性捐赠体和2,4,6-三-1,3,5-三 (TRZ) 接受体的制造TADF发射器 (2,7-F-Ph-DMAC-TRZ和2,7-CF3-Ph-DMAC-TRZ).
研究了有机发光二极管 (OLED) 中制造的发射器的光物理特性和设备性能.

主要成果:

修改后的发射器表现出光的低色变化,并保持了可比的光发光量子产量.
反向系统间交叉速率常量没有受到捐赠者修改的影响.
基于2.7-CF3-Ph-DMAC-TRZ的OLED显示了显著的蓝色转移 (39nm) 并改善了CIE坐标从 (0.36,0.55) 到 (0.22,0.41).
外部量子效率保持稳定,约为22.5%.

结论:

通过引入电子吸收组来进行捐赠工程是一种有效的策略,以提高基于亚克里丁的TADF发射器的颜色纯度.
这种方法在与较弱的电子受体相结合时,有望实现纯蓝色TADF发射器.
这些发现为开发具有增强色彩性能的先进蓝色OLED铺平了道路.

关键词:

亚氨酸的捐赠者是亚氨酸蓝色纯度蓝色纯度热激活延迟光 (TADF) 是一种三甲基烯 (Trifluoromethylphenyl) 是一种三化合物.和有机发光二极管 (OLED).

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