Patent ID: 7758971

Claim:
An organic electroluminescent device comprising: a pair of electrodes comprising a positive electrode and a negative electrode; and a plurality of organic compound layers including a light emitting layer between the pair of electrodes, wherein at least one layer containing a metal complex having a quadridentate ligand is provided between the light emitting layer and the negative electrode; wherein the metal complex is a compound represented by Formula (1): wherein M 11 represents a metal ion selected from the group consisting of a platinum ion and a palladium ion; Q 11 , Q 12 , Q 13 and Q 14 each independently represents an atom group coordinating with M 11 , wherein each of Q 11 and Q 12 is a nitrogen-containing heterocyclic group coordinating with a nitrogen atom, and each of Q 13 and Q 14 is an aryl group coordinating with a carbon atom or a heteroaryl group coordinating with a carbon atom; each of L 11 and L 13 is independently a single bond or an alkylene group, and each of L 12 and L 14 is an alkylene group; n 11 represents 0 or 1, provided that when n 11 is 0, a bond in which L 14 is interposed between Q 13 and Q 14 does not exist; and M 1l -Q 11 bond, M 11 -Q 12 bond, M 11 -Q 13 bond and M 11 -Q 14 bond each may be a covalent bond, a coordinate bond or an ion bond.