NOVELTY - Organic electroluminescent substituted fluorene compounds (I) are new.    USE - (I) are useful in: an organic electroluminescent device; and an organic solar cell (all claimed).    ADVANTAGE - (I): exhibits high luminous efficiency in blue color and excellent life property of material; provides very good operation life for organic light emitting diode; and provides longer device life and appropriate color coordinate.    DETAILED DESCRIPTION - Organic electroluminescent substituted fluorene compounds of formula (I) are new.    ring A1, ring B1 = substituted piperidine moiety of formula (II), substituted morpholine moiety of formula (III), substituted thiomorpholine moiety of formula (IV), substituted piperazine moiety of formula (V) or substituted (1,4)azasilinane moiety of formula (VI); either    R31-R35 = 1-60C alkyl, 6-60C aryl or 3-60C heteroaryl; or    R31R32, R34R35 linked via 3-60C alkylene or 3-60C alkenylene optionally with fused ring = alicyclic ring or aromatic ring (monocyclic or polycyclic);    L1 = substituted fluorenylene moiety of formula (VII) or substituted fused aromatic cyclic moiety of formula (VIII);    A2, B2 = chemical bond, -C(R21)=C(-R22)- or substituted phenylene moieties of formula (IX) or (X);    Ar1, Ar2 = 6-60C arylene, 3-60C heteroarylene, 5-6 membered heterocycloalkylene (containing at least one N, O or S), 3-60C cycloalkylene, 2-60C alkenylene, 2-60C alkynylene, 1-60C alkylenoxy, 6-60C arylenoxy or 6-60C arylenethio (all optionally further substituted by at least one halo, 1-60C alkyl, halo-1-60C alkyl, 6-60C aryl, 3-60C heteroaryl, 5-6 membered heterocycloalkyl (containing at least one N, O, S or Si), 3-60C cycloalkyl, tri(1-60C alkyl)silyl, di(1-60Calkyl)(6-60C aryl)silyl, tri(6-60C aryl)silyl, adamantyl, 7-60C bicycloalkyl, 2-60C alkenyl, 2-60C alkynyl, 1-60C alkoxy, CN, 1-60C alkylamino, 6-60C arylamino, 6-60C ar-1-60C alkyl, 6-60C aryloxy, 6-60C arylthio, 1-60C alkoxycarbonyl, carboxy, NO2 and OH) or chemical bond;    ring C1 = substituted phenylene moiety of formula (XI) or biphenylene moiety of formula (XII); either    R1-R20 = H, halo, 1-60C alkyl, 6-60C aryl, 3-60C heteroaryl, 5-6 membered heterocycloalkyl (containing at least one N, O or S), 3-60C cycloalkyl, tri-1-60C alkylsilyl, di-1-60C alkyl-6-60C arylsilyl, tri-6-60C arylsilyl, adamantyl, 7-60C bicycloalkyl, 2-60C alkenyl, 2-60C alkynyl, 1-60C alkoxy, CN, 1-60C alkylamino, 6-60C arylamino, 6-60C ar-1-60C alkyl, 6-60C aryloxy, 6-60C arylthio, 1-60C alkoxycarbonyl, carboxy, NO2 or OH; or    R1-R20 optionally substituted linked to adjacent substituent via 3-60C alkylene or 3-60C alkenylene optionally with fused ring = alicyclic ring or aromatic ring (monocyclic or polycyclic); and    R21-R26 = 1-60C alkyl, 6-60C aryl, 3-60C heteroaryl, 5-6 membered heterocycloalkyl (containing at least one N, O and S), 3-60C cycloalkyl, tri-1-60C alkylsilyl, di-1-60C alkyl-6-60C arylsilyl, tri-6-60C arylsilyl, adamantyl, 7-60C bicycloalkyl, 2-60C alkenyl, 2-60C alkynyl, CN, 1-60C alkylamino, 6-60C arylamino, 6-60C ar-1-60C alkyl, 6-60C aryloxy, 6-60C arylthio, 1-60C alkoxycarbonyl, carboxy, NO2 or OH (all optionally substituted by at least one halo, 1-60C alkyl (optionally containing halo), 6-60C aryl, 3-60C heteroaryl (optionally containing 6-60C aryl), 5-6 membered heterocycloalkyl (containing at least one N, O and S), 3-60C cycloalkyl, tri-1-60C alkylsilyl, di-1-60C alkyl-6-60C arylsilyl, tri-6-60C arylsilyl, adamantyl, 7-60C bicycloalkyl, 2-60C alkenyl, 2-60C alkynyl, 1-60C alkoxy, CN, 1-60C alkylamino, 6-60C arylamino, 6-60C ar-1-60C alkyl, 6-60C aryloxy, 6-60C arylthio, 1-60C alkoxycarbonyl, carboxy, NO2 or OH), H, halo or 1-60C alkoxy;    m, n = 0-4    An INDEPENDENT CLAIM is also 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 at least one host(s) comprising aromatic compounds of formula ((Ar10)a-X-(Ar20)b) (XIII) or ((Ar30)c-Y1-(Ar40)d) (XIV).    X = 6-60C arylene or 4-60C heteroarylene;    Y1 = anthracenylene;    Ar10-Ar40 = 4-60C heteroaryl, 5-60C cycloalkyl or 6-60C aryl (all optionally substituted by at least one 6-60C aryl or 4-60C heteroaryl (both optionally substituted by at least one C1-C60 alkyl (optionally substituted by halo), 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 (optionally substituted by halo), 1-60C alkoxy, halo, 3-60C cycloalkyl, CN, tri-1-60C alkylsilyl, di-1-60C alkyl-6-60C arylsilyl or tri-6-60C arylsilyl; and    a-d = 0-4.    DESCRIPTION OF DRAWING(S) - The figure shows the cross-sectional view of an organic light emitting diode.    Glass (1)    Transparent electrode (2)    Hole injecting layer (3)    Hole transport layer (4)    Electroluminescent layer (5)