Patent ID: 7754346

Claim:
An organic electroluminescent device comprising an organic compound layer provided between a pair of electrodes, wherein: the organic compound layer comprises a luminescent layer; and the luminescent layer comprises: a metal complex and a plurality of host compounds; wherein the metal complex is represented by the following Formula (I): wherein M 11 represents a metal ion; L 11 to L 15 each independently represent a ligand coordinated to M 11 ; in no case does an additional atomic group connect L 11 and L 14 to form a cyclic ligand; in no case, L 15 is bonded to both L 11 and L 14 to form a cyclic ligand; Y 11 to Y 13 each independently represent a connecting group, a single bond, or a double bond; when Y 11 , Y 12 , or Y 13 represent a connecting group, the bond between L 11 and Y 12 , the bond between Y 12 and L 12 , the bond between L 12 and Y 11 , the bond between Y 11 and L 13 , the bond between L 13 and Y 13 , and the bond between Y 13 and L 14 are each independently a single bond or a double bond; and n 11 represents an integer of 0 to 4; and wherein an ionization potential of the metal complex (Ip(D)), a minimum value out of ionization potentials of the plurality of host compounds (Ip(H)min), and ΔIp, which is defined by ΔIp=Ip(D)−Ip(H)min, satisfy a relationship of ΔIp>0 eV.