| 摘要 |
A carbazole derivative and an organic electroluminescent device using the carbazole derivative are provided to improve luminous efficiency, lifetime, brightness and color reproduction range. A carbazole derivative is represented by the formula 1, wherein R is a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C3-C60 heteroaryl group, a substituted or unsubstituted fluorene group, or a C1-C20 alkyl group; Z1 to Z4 are identical or different one another and are H, a halogen atom, an alkyl group, an alkoxy group, a cyano group, a nitro group, or an acyl group; X1 and X2 are identical or different each other and are H, a halogen atom, an alkyl group, an alkoxy group, a cyano group, a nitro group, an acyl group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted hetero ring having at least one halogen, nitrogen, oxygen or sulfur atom as a ring member; and Y1 and Y2 are identical or different each other and are H, a halogen atom, an alkyl group, an alkoxy group, a cyano group, a nitro group, an acyl group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted hetero ring having at least one halogen, nitrogen, oxygen or sulfur atom as a ring member.
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