Novel metal–chelate emitting materials based on polycyclic aromatic ligands for electroluminescent devices

Abstract

We have designed and synthesized novel metal–chelate complexes based on polycyclic aromatic ligands for electroluminescent devices. These complexes exhibited strong luminescence with blue and green colors. EL properties of devices using these complexes for an emitting layer have been studied. Several good emitting materials were obtained and the EL properties were found to strongly depend on the ligand structure.