| abstract |
The invention discloses an aromatic amine compound and a preparation method, an organic electroluminescent device and a display device, belonging to the technical field of chemistry and organic light-emitting materials. The general structural formula of the aromatic amine compound is: In the formula, X 1 , X 2 , X 3 , and X 4 are selected from any one of C, N, O, and S, and not all of them are C; Ar 1 , Ar 2 , Ar 3 , and Ar 4 independently represent substitution or Unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted fused ring, substituted or unsubstituted spiro, monocyclic or aliphatic ring or aromatic formed by connecting with adjacent substituents any of the rings. The aromatic amine compound provided by the invention contains aromatic amine and five-membered heterocyclic structure, has high glass transition temperature and steric hindrance effect, thus has excellent film stability, and has high refractive index in the visible light field, and is suitable for application in After the cap layer of the OLED device is formed, the light extraction efficiency of the OLED device can be effectively improved. |