CN-substituted <i>ortho</i>-terphenyl core based high triplet energy bipolar host materials for stable and efficient blue TADF devices
作者:Hyuna Lee、Jun Hyuk Park、Ki Joon Yang、Soon Jae Hwang、Ramanaskanda Braveenth、Tae Hoon Ha、Min I Han、Chil Won Lee、Jang Hyuk Kwon
DOI:10.1039/d1tc01119g
日期:——
ortho- and meta-position of the terphenyl core brought an impressive result in photophysical properties and charge carrier transporting ability. Moreover, the introduction of the CN moiety over the ortho-terphenyl core which connected with carbazole donor units not only enables achieving high triplet energy level but also enhances the bipolar characteristics. As expected, our new design strategy leads
设计并合成了两种基于 CN 取代的邻三联苯 (OTP) 核的新型双极型主体材料,用于蓝色热激活延迟荧光 (TADF) 器件。两种主体,3,3''-二(9 H-咔唑-9-基)-[1,1':2',1''-三联苯]-3'-腈( o CN-OTP )和3, 3''-di(9 H -carbazol-9-yl)-[1,1':2',1''-terphenyl]-4'-carbonitrile ( m CN-OTP ),在邻位上被 CN 部分取代三联苯核的间位和间位在光物理特性和电荷载流子传输能力方面带来了令人印象深刻的结果。此外,将 CN 部分引入邻位与咔唑供体单元连接的-三联苯核不仅可以实现高三线态能级,还可以增强双极特性。正如预期的那样,当与稳定的蓝色 TADF 掺杂剂 5-(5,9- dioxa -13 b -boranaphtho[3,2,1-de]anthracen-7-yl)一起使用时,我们的新设计策略可提高器件效率-10