Blue emitters with thermally activated delayed fluorescence (TADF) characteristics have attracted much attention from both academic and industrial researchers in organic light-emitting diodes (OLEDs). In this contribution, three blue molecules of TTT-Ph-Cz, TTT-Ph-Ac and TTT-Ph-BAc in which the tristriazolotriazine (TTT) was employed as the electron acceptor and arylamine (carbazole and acridine derivatives) as the electron donor were prepared and characterized. Both the acridine-substituted compounds (TTT-Ph-Ac and TTT-Ph-BAc) displayed the blue TADF emission between 460 and 470 nm in film state. Additionally, the TTT-Ph-BAc showed clear aggregation-induced emission character. The solution processed OLEDs based on these three molecules were fabricated, and the TTT-Ph-Ac based device displayed a maximum external quantum efficiency of ～10% and peak wavelength of 480 nm. This research demonstrates that this novel TTT core can be a promising electron accepting unit for the design of TADF materials.

具有热激活延迟荧光（TADF）特性的蓝色发光体已引起有机发光二极管（OLED）的学术和工业研究人员的极大关注。在此贡献中，三个三色的TTT-Ph-Cz，TTT-Ph-Ac和TTT-Ph-BAc分子被使用，其中三三唑三嗪（TTT）被用作电子受体，芳基胺（咔唑和a啶衍生物）被用作电子供体被准备和表征。两种the啶取代的化合物（TTT-Ph-Ac和TTT-Ph-BAc）在薄膜状态下均在460至470 nm之间显示蓝色TADF发射。另外，TTT-Ph-BAc显示出清晰的聚集诱导的发射特性。制备了基于这三个分子的溶液处理的OLED，基于TTT-Ph-Ac的器件最大的外部量子效率约为10％，峰值波长为480 nm。这项研究表明，这种新颖的TTT核可以成为TADF材料设计中有希望的电子接受单元。