| 摘要 |
Compounds having a metal M complexed to a ligand L containing a substituted imidazole carbene group, which is represented Formula (I), below: wherein ring B is a 5-member aromatic heterocyclic ring containing at least one heteroatom selected from the group consisting of N, O, and S; wherein ring A is a 5-membered or 6-membered carbocyclic or heterocyclic ring; wherein RA represents mono, di, tri, tetra substitutions or no substitution; wherein R1 represents mono, di, or tri substitution or no substitution; wherein each RA, R1 and R2 is independently selected from various possible substituents; wherein Z1 is nitrogen or carbon; and wherein the ligand is optionally linked with other ligands to comprise a tridentate, tetradentate, pentadentate or hexadentate ligand. Devices, such as organic light emitting devices (OLEDs) that comprise such compounds are also provided. |
