重原子效应应用于 (微秒以下) 热激活的延迟光和具有低效率滚动的全有机发光装置的重原子效应
Michał Mońka1, Szymon Gogoc2, Karol Kozakiewicz1,3
1Faculty of Mathematics, Physics and Informatics, University of Gdańsk, Wita Stwosza 57, 80-308 Gdańsk, Poland.
ACS applied materials & interfaces
|March 18, 2024
概括
在有机发射器中加入显著提高了热激活延迟光 (TADF) OLED 的反向系统间交叉 (rISC). 这项研究揭示了一种hexabromo衍生品,具有9倍更快的rISC,提高了OLED效率并减少了滚动.
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:
- 等重原子 (HAs) 加快有机分子中的旋转禁止转换.
- 有机发射器的衍生物具有热激活延迟光 (TADF) 为缓慢反向系统间交叉 (rISC) 和有机发光二极管 (OLED) 的效率滚动提供解决方案.
研究的目的:
- 为了研究一个三PXZ-TRZ发射器的hexabromo衍生物的光物理性质.
- 了解增强rISC的机制及其对TADF特性的影响.
- 为了评估红色OLED设备中的hexabromo发射器的性能.
主要方法:
- 综合的光物理研究.
- 对关键分子振动和TADF机制的分析.
- 使用超光系统制造和测试红色OLED设备.
主要成果:
- 赫克萨布罗姆衍生物在rISC中呈现了9倍的增强,并且延迟光寿命短2μs.
- 分析表明,3CT → 1CT过渡的几乎完全阻塞,risC通过3LE → 1CT过渡发生.
- 该研究确定了旋转轨道合 (SOC) 的额外"本地化"标准,补充了El-Sayed规则.
结论:
- 由于重原子效应,赫克萨布罗姆发射器在rISC和延迟光寿命方面取得了显著的改进.
- 开发的发射器可以实现窄带红色发射,在OLED中降低效率滚动.
- 这项工作为先进的光电子应用提供了对有机发射器中光物理过程的控制的见解.
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