两极性,添加的PAHs的简单功能化,以实现高效的TADF OLED发射器
Jakub Wagner1, Dharmendra Kumar2, Michał Andrzej Kochman3
1Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
ACS applied materials & interfaces
|July 28, 2023
概括
研究人员为高效的热激活延迟光 (TADF) 发射器开发了新的N-doped多环芳 (PAHs). 这些材料在有机发光二极管 (OLED) 中实现了高量子产量和外部量子效率.
科学领域:
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
- 光电学是指光电子产品.
背景情况:
- 化多环芳 (PAHs) 对光电子应用具有前景.
- 有限的后功能化阻碍了N-doped PAHs作为功能材料的发展.
研究的目的:
- 为高效的热激活延迟光 (TADF) 发射器设计具有 D-A-D 电子结构的新型 N-doped PAH.
- 为了克服在N-doped PAHs中后功能化的局限性.
主要方法:
- 在昆素的环的元位置上加入辅助捐赠体.
- 调整电荷转移特性和延迟光寿命.
- 使用开发的N-PAH发射器制造有机发光二极管 (OLED).
主要成果:
- 实现了0.040.28 eV的狭窄的单元-三元交换能量分割 (ΔEST),促进了高效的反向系统间交叉.
- 获得的高固态光发光量子产量高达96%的黄色或色-红色发射.
- 在OLED中显示的最大外部量子效率为21.9%和高亮度 (20,00030,100 cd/m2) .
结论:
- 新型D-A-D结构的N-PAH发射器在TADF应用中表现出色.
- 这些发现代表了N-doped PAHs在OLED领域的重大进展.
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