Patent ID: 8803134

Claim:
A biscarbazole derivative, which is represented by the following formula (1): in the formula (1): A 1 and A 2 each independently represent a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted aromatic heterocyclic group having 2 to 30 ring carbon atoms; Y 1 to Y 16 each independently represent C(R) or a nitrogen atom, and each R independently represents a hydrogen atom, a substituent, or a bond to a carbazole skeleton; and L 1 and L 2 each independently represent a single bond, a substituted or unsubstituted, divalent aromatic hydrocarbon group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted, divalent aromatic heterocyclic group having 2 to 30 ring carbon atoms, provided that: at least one of A 1 and A 2 represents a substituted or unsubstituted benzofuranyl group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted benzothiophenyl group, a substituted or unsubstituted dibenzothiophenyl group, a substituted or unsubstituted benzonaphthofuranyl group, or a substituted or unsubstituted benzonaphthothiophenyl group; when one of A 1 and A 2 represents a dibenzofuranyl group or a dibenzothiophenyl group, the other represents a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted benzofuranyl group, a substituted or unsubstituted benzothiophenyl group, a substituted or unsubstituted benzonaphthofuranyl group, or a substituted or unsubstituted benzonaphthothiophenyl group; and when Y 6 and Y 11 are bonded to each other, the following conditions (i) and (ii) are satisfied: (i) when A 1 represents a dibenzofuranyl group or a dibenzothiophenyl group, L 1 represents an optionally substituted divalent aromatic hydrocarbon group having 6 to 30 ring carbon atoms; and (ii) when A 2 represents a dibenzofuranyl group or a dibenzothiophenyl group, L 2 represents an optionally substituted divalent aromatic hydrocarbon group having 6 to 30 ring carbon atoms.