Patent ID: 8334648

Claim:
An electroluminescence device comprising a pair of electrodes and a layer of an organic light emitting medium disposed between the pair of electrodes, wherein the layer of an organic light emitting medium is present as a light emitting layer and comprises: (A) an arylamine compound represented by formula V: wherein X 3 is a substituted or unsubstituted pyrene residue, Ar 5 and Ar 6 each independently represent a substituted or unsubstituted monovalent aromatic group having 6 to 40 carbon atoms, and p represents an integer of 1 to 4; and (B) at least one compound selected from the group consisting of anthracene derivatives and spirofluorene derivatives, wherein said anthracene derivatives are represented by formula I: A 1 -L-A 2 (I) wherein A 1 and A 2 may be the same or different and each independently represent a substituted or unsubstituted monophenylanthryl group or a substituted or unsubstituted diphenylanthryl group, and L represents a single bond or a divalent bonding group, and by formula II: A 3 -An-A 4 (II) wherein An represents a substituted or unsubstituted divalent anthracene residue, A 3 and A 4 may be the same or different and each independently represent a substituted or unsubstituted aryl group having 6 to 40 carbon atoms, at least one of A 3 and A 4 represents a substituted or unsubstituted monovalent condensed aromatic ring group or a substituted or unsubstituted aryl group having 10 or more carbon atoms; and said spirofluorene derivatives are represented by formula III: wherein Ar 1 represents a substituted or unsubstituted spirofluorene residue, A 5 to A 8 each independently represent a substituted or unsubstituted aryl group having 6 to 40 carbon atoms; provided that the organic light emitting medium does not include a styryl aryl compound.