来自热激活红色延迟光发射器的高效发光,具有辅助组的灵活构造
Yu-Xin Jin1, Zi-Qi Chen1, Kai Zhang2
1Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu, 215123, China.
Chemistry (Weinheim an der Bergstrasse, Germany)
|July 20, 2023
概括
辅助组中的灵活构造增强了热激活延迟光 (TADF) 发射器. 这项研究揭示了红色TADF分子的改善光物理性质和高效率,有助于设计先进的有机光.
科学领域:
- 有机化学 有机化学
- 材料科学 材料科学 材料科学
- 光物理学的光学物理学
背景情况:
- 热激活延迟光 (TADF) 分子利用坚固的支架来最大限度地减少非辐射衰变并增加光辐射.
- 提高光外合效率和旋转翻转是TADF材料开发中的关键挑战.
研究的目的:
- 研究灵活辅助组构成对TADF发射器光物理性质的影响.
- 为了比较具有灵活构造 (Ph-TPA) 的TADF发射器与具有刚性宏循环 (Mc-TPA) 的发射器的性能.
主要方法:
- 对具有不同辅助组灵活性的新型TADF发射器的合成和表征.
- 光物理测量包括光发光量子收益率 (PLQY) 和外部量子效率 (EQE).
- 激发状态结构扭曲和重组能量的计算分析.
主要成果:
- 与刚性Mc-TPA相比,红色TADF发射器Ph-TPA,具有灵活的辅助组,表现出较低的兴奋状态结构扭曲和较低的重组能量.
- 在630nm时,Ph-TPA实现了92%的高PLQY和30.6%的最先进的EQE.
- 灵活的形状被证明对TADF性能有好处.
结论:
- 灵活的辅助组积极影响TADF发射器的光物理特性.
- 这一发现加深了对有机光因子中结构-性质关系的理解.
- 结果为设计更高效的TADF材料提供了合理的基础.
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