Organic electroluminescent device

1. 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.

2. The organic electroluminescent device according to claim 1 ,

wherein the compound represented by Formula (1) is a compound represented by Formula (2):

wherein M 21 has the same meaning as M 11 ;

Q 23 and Q 24 have the same meaning as Q 13 and Q 14 ;

L 22 has the same meaning as L 12 ;

R 21 and R 22 each independently represents a substituent group;

m 21 and m 22 each independently represents an integer of 0 to 3;

M 21 -N (dotted line) represents a coordinate bond; and

M 21 -Q 23 bond and M 21 -Q 24 bond each may be a covalent bond, a coordinate bond or an ion bond.

3. The organic electroluminescent device according to claim 1 ,

wherein the light emitting layer contains a light emitting material, and

wherein the light emitting material is a phosphorescent material.

4. The organic electroluminescent device according to claim 3 ,

wherein the light emitting material is a metal complex having a quadridentate or more ligand.