公开(公告)号：US11476428B2

公开(公告)日：2022-10-18

申请号：US16732179

申请日：2019-12-31

Applicant: WuHan TianMa Micro-electronics CO., LTD.

Inventor： Kaibo Zhang ,  Kui Wang ,  Tiansheng Ye

IPC: H01L51/00 ,  C07F5/02 ,  C09K11/06 ,  H01L51/50

Abstract: The present disclosure relates to the field of OLED technologies and provides a compound having TADF property. In an embodiment, the compound has a structure represented by Formula (1), in which L1 and L2 are each a hydrogen atom, phenyl, naphthyl, anthracyl, pyridyl, pyrimidinyl, and pyrazinyl; R1 and R2 are each aryl or and heteroaryl, such as a carbazole-derived group, an acridine-derived group, diarylamino, a diarylamine-derived group, and the like. In the present disclosure, the double boron heterocyclic structure functions not only as an electron acceptor but also as a linker. In the compound according to the present disclosure, by attaching a group having a large steric hindrance to the boron atom of the boron heterocyclic ring, the molecules the compound are prevented from aggregating, and thus a π-aggregation or excimer formed by direct accumulation of the conjugate plane is avoided, thereby improving the light-emitting efficiency.