The advent of materials with thermally activated delayed fluorescence (TADF) has triggered a wave of research to break the mutual exclusion of high efficiency and long lifetime of blue organic light-emitting diodes. Representatively, multiple donor-acceptor-type carbazole-benzonitrile (CzBN) derivatives have realized the longest device lifetimes in the blue region up to now together with high efficiencies among all TADF emitters. This perspective timely summarizes the progress of molecular design and device performances of CzBN derivatives and is concluded by providing suggestions on the future development of such materials and the corresponding devices.

中文翻译：

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基于咔唑-苄腈衍生物的蓝色 TADF 材料用于高效稳定的 OLED 的前景

具有热激活延迟荧光（TADF）材料的出现引发了一波研究浪潮，以打破蓝色有机发光二极管的高效率和长寿命的相互排斥。具有代表性的是，多供体-受体型咔唑-苄腈 (CzBN) 衍生物在所有 TADF 发射器中实现了迄今为止在蓝色区域中最长的器件寿命以及高效率。该观点及时总结了CzBN衍生物分子设计和器件性能的进展，并为此类材料和相应器件的未来发展提供了建议。