Patent ID: 8217392

Claim:
An organic electroluminescence element, comprising: at least one pair of electrodes; at least one organic light-emitting layer disposed between the electrodes, the organic light-emitting layer comprising two phosphorescent light-emitting materials and a charge-transporting material, wherein the organic light-emitting element is a white organic light-emitting element, and the charge-transporting material is a hole-transporting material, and wherein one of the two phosphorescent light-emitting materials is a platinum complex expressed by the following general formula 1, and the other is an iridium complex expressed by any one of the following general formulae 2A to 2C: where L 1 is a single bond or a bivalent bridging group; A 1 to A 6 are each independently C—R or N in which R is a hydrogen atom or a substituent; X 1 and X 2 are each independently C or N; Z 1 and Z 2 are each independently a 5-member or 6-member aromatic ring formed together with X—C, or a 5-member or 6-member heterocyclic aromatic ring formed together with X—C, where n is an integer of 1 to 3; X—Y is a bidentate ligand; a ring A is a ring structure which may contain at least one selected from the group consisting of a nitrogen atom, a sulfur atom, and an oxygen atom; R 11 is a substitute, m1 is an integer of 0 to 6, and in the case where m1 is 2 or more, a plurality of R 11 s adjacent to each other may bond to form a ring, which may contain at least one selected from the group consisting of a nitrogen atom, a sulfur atom, and an oxygen atom, and may further contain one or more substituents; R 12 is a substituent, m2 is an integer of 0 to 4, and in the case where m2 is 2 or more, a plurality of R 12 s adjacent to each other may bond to form a ring, which may contain at least one selected from the group consisting of a nitrogen atom, a sulfur atom, and an oxygen atom, and may further contain one or more substituents; and R 11 and R 12 may bond to each other to form a ring, which may contain at least one selected from the group consisting of a nitrogen atom, a sulfur atom, and an oxygen atom, and may further contain one or more substituents.