| abstract |
PROBLEM TO BE SOLVED: To provide a novel carbazole derivative having excellent hole transporting performance and durability and capable of obtaining a carbazole polymer suitable as a hole transporting material. To provide a carbazole polymer having hole transport performance and durability and suitable as a hole transport material, and a hole transport material having excellent hole transport performance and durability. SOLUTION: A carbazole derivative formula (1) and a carbazole polymer formula (2) are represented by specific formulas, and a hole transport material contains the carbazole polymer. . (In the formula, R 1 to R 5 represent a hydrogen atom, an alkyl group, a phenyl group, and the like, and X represents a single bond, a phenylene group, and the like.) |