| 摘要 |
PROBLEM TO BE SOLVED: To provide a carbazole compound suitable as a hole transporting material for use in an organic EL element, and an organic EL element of high luminous efficiency and excellent durability employing the same. SOLUTION: The carbazole compound is represented by formula (1), which has excellent hole-transporting characteristics. An organic EL element employing the same in its hole transporting layer can be driven by a low driving voltage and further has excellent luminous efficiency and durability. In formula (1), Ar<SP>1</SP>, Ar<SP>2</SP>, and Ar<SP>3</SP>each independently represent a substituted or unsubstituted 6-50C aryl group or a substituted or unsubstituted 4-50C heteroaryl group, provided that Ar<SP>2</SP>and Ar<SP>3</SP>may bind to each other to form a ring; R<SP>1</SP>represents a 1-18C straight chain, branched, or cyclic alkyl group, a substituted or unsubstituted 6-50C aryl group, or a substituted or unsubstituted 4-50C heteroaryl group; R<SP>2</SP>and R<SP>3</SP>each independently represent a hydrogen atom, a halogen atom or the like; and n represents an integer of 1 to 3; provided that, if R<SP>1</SP>is an aryl group comprising a substituent, the substituent excludes an amino group. COPYRIGHT: (C)2011,JPO&INPIT |
