Although helically chiral heterohelicenes are widely adopted in chiroptical studies, those with circularly polarized thermally activated delayed fluorescence (CP-TADF), which are highly valuable for circularly polarized organic light-emitting diodes (CP-OLEDs), are rarely realized. Moreover, the core skeletons of known CP-TADF heterohelicenes are limited to the p- and n-doped structures with multiresonance effect. In this study, a new type of helically chiral CP-TADF heterohelicenes featuring a fused donor–acceptor core skeleton is successfully designed and constructed. Enantiomers possessing high configurational stability are achieved and separated, and they efficiently emit CP light with dissymmetry factors reaching 3.1 × 10⁻³ in doped films. Owing to the excellent photophysical properties, a high-performance CP-OLED with the maximum external quantum efficiency of up to 20.0% and an electroluminescence dissymmetry factor reaching 2.9 × 10⁻³ is obtained. This new type of CP-TADF heterohelicenes provides a large space for the development of high-performance CP-TADF materials for various applications.

中文翻译：

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具有圆偏振热激活延迟荧光的螺旋手性供体-受体双杂 [4] 螺旋烯

尽管螺旋手性异螺旋烯在手性光学研究中被广泛采用，但那些具有圆偏振热激活延迟荧光 (CP-TADF) 的异螺旋烯对于圆偏振有机发光二极管 (CP-OLED) 具有很高的价值，但很少被实现。此外，已知 CP-TADF 杂螺旋的核心骨架仅限于具有多共振效应的 p 和 n 掺杂结构。在这项研究中，成功​​设计并构建了一种具有稠合供体-受体核心骨架的新型螺旋手性 CP-TADF heterohelicenes。实现并分离了具有高构型稳定性的对映体，它们有效地发射CP光，不对称因子达到3.1 × 10 ^-3在掺杂薄膜中。由于优异的光物理特性，获得了最大外量子效率高达20.0%、电致发光不对称因子达到2.9×10 -3 的高性能CP- OLED ^。这种新型的 CP-TADF heterohelicenes 为开发适用于各种应用的高性能 CP-TADF 材料提供了广阔的空间。