Metal complex and organic electroluminescent device using the same

摘要

A metal complex incorporated in the organic electroluminescent device as a dopant in a light emitting layer, a hole transfer layer, or an electron blocking layer. The metal complex is represented by the formula wherein M represents a transition metal whose atomic number of the periodic table is greater than 40; m is an integer equal to or smaller than the ligand numbers of M, n is an integer smaller than m; R₁, R₂, R₃, and A are independently selected from the group consisting of a halogen atom, a cyano group, a phenyl group, a heterocyclic group, a CF₃ group, a substituted or unsubstituted C1-C30 alkyl or alkoxy group, a hydroxy group, a thiol group, a substituted or un-substituted C2-C30 alkenyl group, a substituted or unsubstituted C6-C30 aryl group, and a haloalkyl group; Y₁ represents an atomic group having a nitrogen-containing heterocyclic ring.