NOVELTY - Substituted organic electroluminescent anthracene compounds (I) are new.    USE - (I) are useful in an organic electroluminescent device and an organic solar cell (all claimed).    ADVANTAGE - (I) exhibit excellent color purity, high luminous efficiency and much improved device lifetime.    DETAILED DESCRIPTION - Substituted organic electroluminescent anthracene compounds of formula (I) are new.    R1, R2 = 1-20C alkyl, 2-20C alkenyl, 2-20C alkynyl, 3-15C cycloalkyl, tri(1-20C)alkylsilyl, di(1-20C)alkyl(6-20C)arylsilyl, tri(6-20C)arylsilyl, adamantyl, (7-15C)bicycloalkyl or (4-20C)heteroaryl (all substituted with one or more substituent(s) of deuterium, (1-20C)alkyl, (1-20C)alkenyl, (1-20C)alkynyl, halo, phenyl, fluorenyl, naphthyl or anthryl), H or deuterium; and    Ar1-Ar4 = 6-20C aryl or 4-20C heteroaryl (both substituted by one or more substituent(s) of deuterium, 1-20C alkyl (optionally halo substituted), 1-20C alkoxy, 3-15C cycloalkyl, halo, CN, tri(1-20C)alkylsilyl, di(1-20C)alkyl(6-20C)arylsilyl or tri(6-20C)arylsilyl) or (thio)morpholino.    An INDEPENDENT CLAIM is included for an organic electroluminescent device comprising a first electrode, a second electrode and at least one organic layer(s) interposed between the first electrode and the second electrode, where the organic layer comprises (I) and one or more host(s) of aryl compounds of formula ((Ar21)e-L1-(Ar22)f) (III) or ((Ar23)g-L2-(Ar24)h) (IV).    L1 = 6-60C arylene or 4-60C heteroarylene;    L2 = anthracenylene;    Ar21-Ar24 = 4-60C heteroaryl or 6-60C aryl (both optionally substituted with one or more substituent(s) of deuterium, 1-60C alkyl (optionally halo substituted), 1-60C alkoxy, 3-60C cycloalkyl, halo, CN, tri(1-60C)alkylsilyl, di(1-60C)alkyl(6-60C)arylsilyl or tri(6-60C)arylsilyl), H, 1-60C alkyl, 1-60C alkoxy, halo or 5-60C cycloalkyl; and    e-h = 0-4.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of an organic LED.    Glass (1)    Transparent electrode (2)    Hole inject layer (4)    Electroluminescent layer (5)    Electron transport layer. (6)