| abstract |
An object of the present invention is to provide an organic EL element having an excellent lifetime, luminous efficiency, thermal and electrical stability, and a long driving lifetime, using an organometallic complex that exhibits phosphorescence emission. An organic thin film layer, and the organic thin film layer is bonded to a metal atom in a tridentate form via two nitrogen atoms and a carbon atom to the metal atom. A tridentate ligand in which a carbon atom is located, and a monodentate ligand bonded to the metal atom through one atom selected from a C atom, an N atom, an O atom, a P atom, and an S atom; It is an organic EL element containing the organometallic complex which has this. |