The construction of new and efficient chiral TADF materials with red emission and the exploration of their applications in OLED devices still remain a great challenge for the difficulty in molecular design and low efficiency of devices. In this work, we synthesized a couple of 1,8-naphthalimide-based enantiomers (−)-(R,R)-CAI-DMAC and (+)-(S,S)-CAI-DMAC. The enantiomers not only exhibit high thermal stability with decomposition temperature of 405 °C, excellent electrochemical properties, and good thermally activated delayed fluorescence (TADF) properties with small ΔE_ST of 0.07 eV, but also show obvious mirror-image circular dichroism and circularly polarized luminescence properties. Moreover, by using (−)-(R,R)-CAI-DMAC and (+)-(S,S)-CAI-DMAC as emitters, the OLEDs with the bands both centred at 592 nm achieved high maximum external quantum efficiency of 12.4% and 12.3%, respectively.

由于分子设计的困难和器件的低效率，具有红色发射的新型高效手性TADF材料的结构及其在OLED器件中的应用探索仍然是一个巨大的挑战。在这项工作中，我们合成了一对基于1,8-萘二甲酰亚胺的对映异构体（-）-（R，R）-CAI-DMAC和（+）-（S，S）-CAI-DMAC。对映异构体不仅表现出高的热稳定性，分解温度为405°C，还具有出色的电化学性能和良好的热活化延迟荧光（TADF）性能，且ΔE _ST小0.07eV，但还显示出明显的镜像圆二色性和圆偏振发光特性。此外，通过使用（-）-（R，R）-CAI-DMAC和（+）-（S，S）-CAI-DMAC作为发射体，两个都位于592 nm波段的OLED获得了很高的最大外部量子效率分别为12.4％和12.3％。