Patent ID: 7348070

Claim:
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): wherein X 11 , X 12 , and X 13 each independently represent a carbon atom, a nitrogen atom, an oxygen atom or a sulfur atom; Y 1 represents a nitrogen atom; Z 1 represents a nitrogen atom; M 1 represents an ion of metal selected from the group consisting of metals in the 2nd to 4th periods of the Periodic Table of Elements; L 1 represents a ligand; n 1 represents an integer of 1 or greater; m 1 represents an integer of 0 or greater; and the bond between every pair of adjacent atoms is selected from the group consisting of a single bond, a double bond, a triple bond, and a coordinate bond.