| abstract |
The present invention provides an organic electroluminescent compound, which has a structure represented by the following formula (I) or (II): Among them, R 1 ~ R 4 are selected from: H, halogen, cyano, C1 ~ C20 chain alkyl, C1 ~ C20 halogenated chain alkyl, C3 ~ C20 cycloalkyl, C3 ~ C20 halogenated ring Alkyl group, C1-C20 alkoxy group, C1-C20 silyl group, aryloxy group with 6-30 ring carbons, aromatic hydrocarbon group with 6-30 ring carbons and 6-30 ring carbons A heterocyclic aromatic hydrocarbon group of 30; Ar 1 and Ar 2 are each independently selected from: an aromatic hydrocarbon group with 6-30 ring carbons and a heterocyclic aromatic hydrocarbon group with 6-30 ring carbons. The organic electroluminescent compound of the present invention has excellent electron blocking performance and higher glass transition temperature; the OLED device prepared by using the organic electroluminescent compound of the present invention shows lower operating voltage and higher current Efficiency, and has a longer service life; therefore, it has a wide range of application value and excellent market potential. |