螺旋性性多共振热激活延迟光发射器及其在高光有机发光二极管中的使用
Jingxiang Wang1, Dongyang Chen1,2,3, Juan Manuel Moreno-Naranjo4
1Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews St Andrews, Fife KY16 9ST UK eli.zysman-colman@st-andrews.ac.uk +44 1334 463808 +44 1334 463826.
Chemical science
|September 27, 2024
概括
具有螺旋结构的新型合多共振热激活延迟光 (MR-TADF) 材料被合成为循环极化有机发光二极管 (CP-OLED). 这些稳定发射器在超光OLED中实现了高效率,证明了先进显示技术的有前途战略.
科学领域:
- 有机电子 有机电子
- 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:
- 状多共振热激活延迟光 (MR-TADF) 材料对于开发高效的循环极化有机发光二极管 (CP-OLED) 是至关重要的.
- 现有的性发射器经常面临着配置稳定性和实现高效率和狭窄的发射带宽的挑战.
研究的目的:
- 为了合成和描述具有增强的配置稳定性的新型本质上螺旋性性MR-TADF发射器.
- 评估这些新发射器在高光有机发光二极管 (HF-OLED) 中的性能.
主要方法:
- 合成了两种新的手性MR-TADF分子,tBuPh-BN和DPA-tBuPh-BN,它们具有由硬体相互作用诱导的内在螺旋性手性.
- 光物理特征,包括光发光量产量 (ΦPL) 和循环极化发光量 (CPL) 的测量.
- 制造和测试高频OLED设备,使用合成的发射器和五-9H-carbazol-9-yl) benzonitrile (5CzBN) 辅助剂.
主要成果:
- 合成的种族MR-TADF材料表现出狭带辐射,具有高光发光量子产量 (高达85%).
- 分离的反体表现出对称的CPL,具有显著的不对称系数 (pHgPLpHg高达1.5×10-3).
- 结合这些发射器的HF-OLED实现了最大的外部量子效率 (EQEmax) 高达20.9%,具有狭窄的发射带宽.
结论:
- 已经证明了开发具有显著的配置稳定性的内在螺旋性MR-TADF发射器的成功策略.
- 这些稳定的奇拉发射器对高性能高频OLED应用具有很大的前景,为先进的循环偏光发射铺平了道路.
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