Patent ID: 8349472

Claim:
An organic electroluminescent device, comprising a light-emitting material, wherein the light-emitting material comprises two compounds, and a spectrum of luminescence from the light-emitting material includes at least one peak that does not correspond to any peak present in a spectrum of luminescence of either individual compound, wherein the two compounds each comprise at least one electroluminescent material represented by the following formula wherein Ar 1 designates a divalent group represented by the formula, —Ar 6 —Ar 7 —Ar 8 — wherein Ar 6 to Ar 8 are each imidazole, pyrazole, isothiazole, isoxazole, pyrimidine, pyridazine, furazane, thianthrene, isobenzofuran, indolizine, isoindole, 1H-indazole, purine, phthalazine, naphthyridine, quinazoline, cinnoline, pteridine, β-carbazoline, phenanthridine, acridine, perimidine, or phenoxazine, wherein Ar 2 to Ar 5 designate, independently with one another, a substituted or non-substituted aryl group having 6 to 20 carbon atoms, and wherein at least one of Ar 2 to Ar 5 of the compound represented by the formula has a substituted or non-substituted styryl group as a substituent.