NOVELTY - Substituted 4-(6H-indolo(3,2-b)quinoxalin-9-yl)aniline compounds (I) are new.    USE - (I) are useful for organic electroluminescent devices such as an organic LED, an organic solar cell, an organ photoreceptor and an organic thin film transistor, which are useful in an electronic device (all claimed) such as cellular phone, personal digital assistant, electronic dictionary, portable media player, remote controller, navigation system, game console, TV and computers.    ADVANTAGE - (I) have excellent driving characteristic, rapid response speed and color reproduction range, and improve the luminous efficiency, driving voltage, thermal resistance, chromatic purity and lifetime of the device.    DETAILED DESCRIPTION - Substituted 4-(6H-indolo(3,2-b)quinoxalin-9-yl)aniline compounds of formula (I) are new.    Either R1-R3 = (a) H, D, tritium, halo, 1-60C alkyl, 1-60C alkoxy, 1-60C alkylamine, 6-60C aryl amine, 1-60C alkyl thiophene, 6-60C thiophene aryl, 2-60C alkenyl, 2-60C alkynyl, 3-60C alkenyl, 6-60C aryl, 6-60C deuterium-substituted aryl group, 8-60C aryl alkenyl, optionally substituted silane, optionally substituted boron, optionally substituted germanium, 2-60C optionally substituted heterocyclic ring or optionally substituted 6-60C aryl, (b) 1-20C alkyl, 2-20C alkenyl, 1-20C alkoxy, 6-60C aryl, 6-60C deuterium-substituted aryl group, 7-20C aryl, 8-20C alkenyl aryl, 2-60C heterocyclic, nitrile and acetylene substituents or optionally substituted 1-50C alkyl, (c) H, D, tritium, halo, CN, NO2, 1-60C alkyl, 1-60C alkoxy, 1-60C alkylamine, 6-60C arylamine, 1-60C alkyl thiophene, 2-60C alkenyl, 2-60C alkynyl, 3-60C alkenyl, 6-60C aryl, 6-60C deuterium-substituted aryl, optionally substituted silane, optionally substituted boron, optionally substituted germanium, optionally substituted 2-60C heterocyclic or 2-60C heterocyclic optionally substituted with hetero as O, N, Sand Si or (d) 6-60C alicyclic fused ring or 3-60C aromatic ring; or    R1+R2 = optionally saturated ring.    INDEPENDENT CLAIMS are included for:    (1) an organic electroluminescent display device including an organic layer including (I); and    (2) an electronic device comprising the organic electroluminescent display device and a control unit for driving the display device.