ORGANOMETALLIC COMPLEXES, ORGANIC EL DEVICES, AND ORGANIC EL DISPLAYS

摘要

An object of the present invention is to provide an organic EL element which has excellent lifetime, light-emitting efficiency, color conversion efficiency, etc., and the like, and the organic EL element includes at least one selected from (1) a organometallic complex including a rhenium atom; one ligand which has a coordinated nitrogen atom and a coordinated oxygen atom, each coordinated with the rhenium atom, and has at least one pi conjugation part; and the other ligand coordinated with the rhenium atom in such a way that the ligand saturates the coordination number of the rhenium atom and the charge of the whole organometallic complex is neutral, (2) an organometallic complex including an rhenium atom; one ligand which has a coordinated nitrogen atom, a coordinated carbon atom, each coordinated with the rhenium atom, and has at least one pi conjugation part; and the other ligand coordinated with the rhenium atom in such a way that the ligand saturate the coordination number of the rhenium atom and the charge of the whole organometallic complex is neutral, and (3) an organometallic complex including at least one of Group 8 metal atoms selected from Group 8 metal element; one ligand which has at least one pi conjugation part and is coordinated with the atom; and a ligand which is selected from an aliphatic dithiolate ligand and a heteroaromatic dithiolate ligand, and is coordinated with the atom.