Organic light emitting diode containing a novel Ir complex as a phosphorescent emitter

摘要

A phosphorescent Ir complex having the following structures (I) or (II) is used as an emitter in an organic light emitting diode (OLED): wherein X is an arbitrary monoanionic bidentate ligand; Z is an arbitrary moiety constituting a nitrogen-containing heterocyclic group; R₁ is a substituent on the nitrogen-containing heterocyclic group; m is 0 or a positive integer; R₂ and R₃ independently are H, halogen, C1-C6 alkyl, a halogen-substituted C1-C6 alkyl, C1-C6 alkoxy, phenyl C1-C6 alkyl, amino, aryl, heterocyclic aryl substituent.