Patent ID: 7320834
Filing Date: 2008-01-22
Classification: C09K,H05B,Y10S

Abstract:
1. An organic light emitting diode (OLED) comprising: an anode on a substrate, an electroluminescent medium on said anode, and a cathode on said electroluminescent medium, characterized in that said electroluminescent medium comprises a light emitting layer comprising a phosphorescent Ir complex having the following structures (I) or (II): wherein X is an arbitrary monoanionic bidentate ligand; Z is an arbitrary atomic moiety capable of forming a nitrogen-containing heterocyclic group; R m is 0 or any positive integer determined by the ring size of said nitrogen-containing heterocyclic group; R R and provided that said nitrogen-containing heterocyclic group containing said Z moiety is not pyridine, quinoline or isoquinoline.