Patent ID: 7648778

Claim:
An organic electroluminescent element comprising: a pair of electrodes; and at least one organic compound layer between the pair of electrodes, said at least one organic compound layer comprising a light-emitting layer, wherein the light-emitting layer comprises a light-emitting material; and a host material that emits light in a quantity of 5% or less based on the total light emission of the entire element, wherein the host material comprises at least one complex represented by formula (1): wherein M 11 represents a hexacoordinate transition metal ion, Y 11 represents a nitrogen atom or a substituted or unsubstituted carbon atom, L 11 represents a ligand, Q 11 and Q 12 each represents an atomic group for forming a nitrogen-containing heterocyclic ring, n 11 represents an integer of 1 to 3, n 12 represents an integer of 0 to 4, X 11 represents a counter ion, and n 13 represents an integer of 0 to 3.