公开(公告)号：US11133476B2

公开(公告)日：2021-09-28

申请号：US15673327

申请日：2017-08-09

Applicant: SHANGHAI TIANMA AM-OLED CO., LTD.

Inventor： Miao Wang ,  Xiangcheng Wang ,  Ying Liu ,  Yuji Hamada ,  Jinghua Niu

IPC: H01L51/54 ,  H01L51/00 ,  C07D471/04 ,  C07D519/00 ,  H01L51/50 ,  H01L51/52

Abstract: The present disclosure relates to an electron transport material having a structure represented by formula (I). The present disclosure enhances the glass transition temperature of the material by way of increasing the molecular weight thereof through modifying phenanthroline, without influencing the electron transport property of the material. A novel type of electron transport material having a glass transition temperature of more than 100° C. is designed by the present disclosure. The compound provided by the present disclosure is used as an electron transport material, i.e. as an electron transport layer; and the compound is doped with metals for use as an electron injection layer, thereby improving the efficiency of an OLED device and reducing the operation voltage.