在热激活的延迟光聚合物中,氧化物平衡的内部和链间通过空间的电荷转移:超过30%的外部量子效率
Ying Xin1, Yonglin Zhu1, Ruixin Chi1
1Key Laboratory of Functional Inorganic Material Chemistry (Chinese Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|July 4, 2023
概括
在聚合物中实现平衡的穿越空间电荷转移 (TSCT) 是高效率的关键. 这项研究使用新型共聚合物平衡了链内和链间的TSCT,从而在光电子设备中实现了创纪录的效率.
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:
- 热激活延迟光 (TADF) 聚合物对于高效的有机电子是必不可少的.
- 平衡链内和链间通过空间电荷传输 (TSCT) 对于提高TADF聚合物性能至关重要.
- 实现这种平衡仍然是材料设计的一个重大挑战.
研究的目的:
- 开发一种有效的策略,在非合聚合物中平衡链内和链间的TSCT.
- 调查接受器设计对TSCT和光电子性能的影响.
- 在TADF共聚合物中实现高光发光和电光发光效率.
主要方法:
- 非结合性共聚合物的合成,其中包括9,9-二甲基亚克里丁供体和基于三酸氧化物 (PO) 的受体.
- 使用稳态和瞬态辐射光谱学的表征.
- 优化受体的感应和硬质效应,以控制TSCT.
主要成果:
- 同聚合物显示出平衡的链内和链间TSCT,性能优于相应的混合物.
- 具有强大的电子吸收能力和硬质阻碍的DPOT接受器产生了具有>95%光发光和>32%电光发光量子效率的共聚物.
- DPOT的协同诱导和固体效应增强了TSCT,抑制了单元/三元火,并提高了设备性能.
结论:
- 开发的战略有效地平衡了非合共聚物中链内和链间的TSCT.
- 基于DPOT的共聚物表现出最先进的效率,展示了它们在高性能光电子应用中的潜力.
- 这些发现为TADF聚合物的低成本,大规模和高效应用铺平了道路.
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