abstract |
A biscarbazole derivative represented by the following formula (1). (In the formula (1), A 1 , A 2 , L 1 , L 2 , R 1 to R 4 and ad are as described in the specification.) Biscarbazole derivatives represented by the formula (1) Is useful as a component of an organic EL element, and an organic EL element containing this derivative can be driven at a low voltage and has a long life. |