| 摘要 |
<p>This invention pertains to light emitting materials comprising novel ortho-metalated transition metal complexes [C^N] 2 M(T)(L), comprising chelate C^N ligands, monodentate neutral ligand (L) having sp 2 hybridized N atom and a monodentate anionic ligand (T) chosen among CN - , CNO - , CNS - . It has been surprisingly found that when the metal has bound thereto both an anion chosen among cyanide, thiocyanate, cyanate, possessing strong à donor and À acceptor properties, and a monodentate neutral ligand L, as above defined, said ligands advantageously participate in the emission process, significantly shifting emission towards higher energies (blue-shift) and enabling appreciable improvement of the emission efficiency of complexes [C^N] 2 M(T)(L).
Still objects of the invention are the use of said light emitting materials and organic light emitting device comprising said light emitting material.</p> |
