Purely organic emitters with high exciton utilization have attracted considerable attention in the field of organic light‐emitting diodes (OLEDs). However, most reported thermally activated delayed fluorescence (TADF) emitters suffer from concentration quenching and exciton annihilation, so that they require complicated doping technique in OLED application. Nonetheless, the serious efficiency roll‐off remains a big challenge for doped OLEDs of TADF emitters. To simplify the fabrication process and improve the stability of devices, developing organic emitters for nondoped OLEDs is of high significance. This progress report provides a systematic summary and comments on the recent advances of efficient organic luminescent materials including conventional TADF materials and novel aggregation‐induced delayed fluorescence (AIDF) luminogens for the fabrication of high‐performance nondoped OLEDs. Their molecular design strategies, photophysical properties, and electroluminescence performances in nondoped OLEDs are elucidated in depth. The newly emerged organic materials with AIDF nature could be a promising direction for exploring light‐emitting materials to advance efficiency and stability of OLEDs.

中文翻译：

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具有聚集诱导的延迟荧光的纯有机材料，用于高效的非掺杂OLED

具有高激子利用率的纯有机发光体在有机发光二极管（OLED）领域引起了相当大的关注。然而，大多数报道的热激活延迟荧光（TADF）发射器遭受浓度猝灭和激子an灭，因此在OLED应用中需要复杂的掺杂技术。尽管如此，严重的效率下降仍然是TADF发射器的掺杂OLED面临的巨大挑战。为了简化制造过程并提高器件的稳定性，开发用于非掺杂OLED的有机发射极具有重要意义。这份进展报告对高效有机发光材料的最新进展进行了系统的总结和评论，包括传统的TADF材料和新型的聚集诱导延迟荧光（AIDF）发光剂，这些材料用于制造高性能非掺杂OLED。深入阐明了它们在非掺杂OLED中的分子设计策略，光物理性质和电致发光性能。具有AIDF性质的新出现的有机材料可能是探索发光材料以提高OLED的效率和稳定性的有前途的方向。