| abstract |
An organic EL device includes a luminescencenlayer containing, as a luminescent material allowing anhigh-luminescence and high-efficiency luminescence forna long period of time, a metal coordination compoundnrepresented by the following formula (1): LmML'n,nwherein M denotes Ir, Pt, Ph or Pd; L denotes anbidentate ligand; L' denotes a bidentate ligandndifferent from L; m is an integer of 1, 2 or 3; and nnis an integer of 0, 1 or 2 with the proviso that thensum of m and n is 2 or 3. The partial structure MLmnis represented by a formula (2) or a formula (3) shownnbelow, and the partial structure ML'n is representednby a formula (4) or a formula (5) shown below:n nwherein CyN1, CyN2 and CyN3 independently denote ansubstituted or unsubstituted cyclic group containing annitrogen atom connected to M; CyN4 denotes a cyclicngroup containing 8-quinoline or its derivative havingna nitrogen atom connected to M; CyC1, CyC2 and CyC3nindependently denote a substituted or unsubstitutedncyclic group containing a carbon atom connected to M,nwith the proviso that the metal coordination compoundnis represented by the formula (2) when n is 0. |