Patent ID: 7901791

Claim:
A carbazole derivative represented by a general formula (1), wherein R 1 is one selected from the group consisting of hydrogen, an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 25 carbon atoms, a heteroaryl group having 5 to 9, an arylalkyl group, and an acyl group having 1 to 7 carbon atoms; wherein R 2 is a substituent represented by a general formula (2), wherein each of Ar 1 to Ar 6 is one selected from the group consisting of an aryl group having 6 to 25 carbon atoms and a heteroaryl group having 5 to 9 carbon atoms; wherein each of X and Y is one selected from the group consisting of a bivalent aromatic hydrocarbon group having 6 to 25 carbon atoms and a bivalent heterocyclic group having 5 to 10 carbon atoms, and wherein Ar 1 and Ar 4 , Ar 2 and Ar 5 , Ar 3 and Ar 6 , and X and Y have identical structures, respectively.