Patent ID: 8642782

Claim:
A carbazole derivative represented by a general formula (G1), wherein Ar 1 represents a phenylene group, a naphthylene group, or a biphenylene group, wherein Ar 2 represents an aryl group that has 14 to 30 carbon atoms and comprises a condensed tricyclic ring, a condensed tetracyclic ring, a condensed pentacyclic ring, a condensed hexacyclic ring, or a condensed heptacyclic ring, wherein R 0 represents a group represented by a general formula (g1), wherein R 8 represents hydrogen, an alkyl group having 1 to 4 carbon atoms, an aryl group having 6 to 15 carbon atoms, or a group represented by a general formula (g2), wherein a substitution site of R 0 is a carbon atom represented by either α or β, wherein a substitution site of R 8 is a carbon atom represented by either γ or δ, wherein n is either 0 or 1, wherein Ar 1 has no substituent or a first substituent, and the first substituent is an alkyl group having 1 to 4 carbon atoms, wherein Ar 2 has no substituent or a second substituent, and the second substituent is of an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 15 carbon atoms, wherein X 1 represents oxygen or sulfur, and R 1 to R 7 individually represent hydrogen, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 15 carbon atoms, and wherein X 2 represents oxygen or sulfur, and R 9 to R 15 individually represent hydrogen, an aryl group having 6 to 15 carbon atoms, or an alkyl group having 1 to 4 carbon atoms.