| abstract |
The present invention provides a novel compound whose structure is represented by formula (I). Among them, R1 to R5 are independently selected from C1-C20 aliphatic alkyl groups or C6-C20 aromatic groups; Ar is selected from C4-C30 aromatic rings, C4-C30 N-containing heterocycles, and C4-C30 condensed Heterocyclic aromatic hydrocarbons, C4-C30 arylamino or C4-C30 aryloxy; n is 1 or 2; A1 to A4 are N atoms or C atoms; when A1 and A3 are N atoms at the same time, A2 and A4 are C atom; or, when A1 and A4 are N atoms at the same time, A2 and A3 are C atoms; or, when A2 and A4 are N atoms at the same time, A1 and A3 are C atoms; or, when A3 and A4 are N atoms at the same time A1 and A2 are C atoms; or, when A1, A3, and A4 are N atoms at the same time, A2 is a C atom; L is a single bond or a C6-C10 aromatic ring or a C4-C10 N-containing heterocycle. Such compounds are used as electron transport layer materials or light-emitting host materials in organic electroluminescent devices. |