Organic electroluminescent device

An organic electroluminescent device comprising:

• a pair of electrodes;
• and
• at least one organic compound layer between the pair of electrodes, the at least one organic compound layer including a light emitting layer,
• wherein the light emitting layer contains a phosphorescent material and a compound represented by the formula (I):
• 13
• wherein X11, X12, and X13 each independently represent a carbon atom, a nitrogen atom, an oxygen atom or a sulfur atom;
• Y1 represents a carbon atom, a nitrogen atom, an oxygen atom, a sulfur atom or a phosphorus atom;
• Z1 represents a nitrogen atom, an oxygen atom, a sulfur atom or a phosphorus atom;
• M1 represents a metal ion;
• L1 represents a ligand;
• n1 represents an integer of 1 or greater;
• m1 represents an integer of 0 or greater;
• and the bonds between every adjacent atoms is selected from a single bond, a double bond, a triple bond, and a coordinate bond;
• with proviso that a compound in which either one of Y1 and Z1 is a nitrogen atom and the other is an oxygen atom is excluded.