ORGANIC EL MATERIAL CONTAINING AZACARBAZOLE DERIVATIVE HAVING CARBAZOLYL GROUP, AND ORGANIC EL ELEMENT USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an organic EL material which improves luminous efficiency and achieves a longer service life.SOLUTION: The organic EL material is represented by formula (1). [In the formula (1), Xto Xare each a nitrogen atom, or a carbon atom singly bonded to R; Ris a hydrogen atom, a halogen atom, a 6-18C aryl group or heteroaryl group, or a 1-12C alkyl group; Rto Rare each independently a 6-30C aryl group or heteroaryl group; and at least one of Xto Xis a nitrogen atom.]