Electroluminescent device comprising oxadiazole compounds luminescent material, oxadiazole compounds for the device, and method of producing oxadiazole compounds

An electroluminescent device comprising:

• a negative electrode,
• a positive electrode, and
• an organic compound layer which is interposed between said negative electrode and said positive electrode and comprises at least one oxadiazole compound with a plurality of aryl oxadiazole structures selected form the group consisting of oxadiazole compounds of formulae (II), (IV), (V) and (VI):
• ##STR298## wherein R.sup.1 and R.sup.2 each represent hydrogen, a halogen, trifluoromethyl group, cyano group, nitro group, an alkyl group having 1 to 20 carbon atoms, an aryl group, an alkoxyl group having 1 to 20 carbon atoms, an aryloxy group, an alklthio group, an amino group, an alkyloxycarbonyl group, an acyl group, a sulfonyl group, a carbamoyl group, sulfamoyl group, an alkylene dioxy group, or an alkylene dithio group;
• and Ar.sup.1 and Ar.sup.2 each represent an aromatic hydrocarbon ring, or an aromatic heterocyclic ring.