Pyridyl-contained dicarbazole compound and application thereof

The invention provides a novel compound. The compound which has the advantages of symmetric structure, simple preparation technology, high luminescent efficiency and high carrier mobility can be applied to electron transport layers of electroluminescent elements, and devices applied with the compound have the advantages of obvious driving voltage reduction and obvious current efficiency improvement. The structure of the compound has a general formula represented by formula I; and in the formula I, the mother nucleus is selected from 2,8-dipyridyl-5,11-dialkylindole[3,2b]dicarbazole, the end group Ar is selected from a phenyl group, a biphenyl group or a naphthyl group, and R is a C1-C6 alkyl group or a phenyl group.