A heterocycle fusing strategy for simple construction of efficient solution-processable pure-red thermally activated delayed fluorescence emitters
作者:Xu Gong、Yepeng Xiang、Weimin Ning、Lisi Zhan、Shaolong Gong、Guohua Xie、Chuluo Yang
DOI:10.1039/d2tc02089k
日期:——
The development of solution-processable pure-red thermally activated delayed fluorescence (TADF) emitters remains a challenging task in the field of organic light-emitting diodes (OLEDs). Here two strong electron acceptor moieties, acenaphtho[1,2-b][1,2,5]oxadiazolo[3,4-e]pyrazine (ANOP) and acenaphtho[1,2-b][1,2,5]thiadiazolo[3,4-e]pyrazine (ANTP), were designed and synthesized by fusing 1,2,5-oxadiazole
可溶液加工的纯红色热激活延迟荧光 (TADF) 发射器的开发仍然是有机发光二极管 (OLED) 领域的一项具有挑战性的任务。这里有两个强电子受体部分,苊[1,2 - b ][1,2,5]恶二唑并[3,4- e ]吡嗪(ANOP)和苊[1,2- b ][1,2,5]噻二唑并[3,4- e ]吡嗪(ANTP)是通过将1,2,5-恶二唑或1,2,5-噻二唑与苊并[1,2- b ]吡嗪单元通过简单的无催化剂脱水环化反应。结合刚性给电子单元,9,9-二甲基-9,10-二氢吖啶(DMAC) 和 2,7-二甲基-10 H螺[吖啶-9,9'-芴] ( MeFAC ),四种可溶液处理的纯红色 TADF 发射体, ANOP- DMAC、 ANOP -MeFAC、ANTP-DMAC和ANTP- MeFAC是通过无催化剂的亲核取代反应设计和制备的。合理的分子设计原则赋予所有发射体小的单重态-三重态能隙(Δ E ST)、突出的