METAL COORDINATION COMPOUND AND ELECTROLUMINESCENCE DEVICE

摘要

A metal coordination compound having a basis structure represented by a general formula MLmL'n (1) (wherein M is a metal atom of Ir, Pt, Rh or Pd; L and L' represent mutually different bidentate ligands; m is 1, 2 or 3; and n is 0, 1 or 2, with the proviso that m+n is 2 or 3) in which basic structure at least one bidentate ligand L has a partial structure formed by condensation via an alkylene group having 2 - 10 carbon atoms, is provided. In an electroluminescence device constituted by one or a plurality of organic films disposed between a cathode and an anode, at least one layer is a luminescence layer which is formed by mixing luminescent molecules consisting of the metal coordination compound having the structure represented by the formula (1) as a guest material in a host material. By this luminescence layer, it becomes possible to provide an electroluminescence device which produce high-efficiency luminescence and retains a high luminance stably for a long period of time. <IMAGE>