The transition metal complexes carbene ligand structures and its application in a light-emitting material comprising

The present invention discloses a complex compound structure and application of the transition metal carbene ligand containing a luminescent material. By the choice of different heteroleptic N ^ N ligands, the transition metal complexes containing carbene ligands may exhibit a different wavelength phosphorescent emission. The transition metal complexes containing carbene ligands may be applied to electroluminescent element so that said electroluminescent light element changes color and can be more flexible to maintain good electrical excitation light emitting element efficacy.