NOVELTY - A fluorene and pyrene derivative organic electroluminescent compound is new.    USE - Fluorene and pyrene derivative organic electroluminescent compound (I) for organic electroluminescent device and organic solar cell (claimed).    ADVANTAGE - The organic electroluminescent compound (I) exhibits high luminous efficiency in blue color and excellent life property as a material, and prepares an organic electroluminescent device having very good operation life.    DETAILED DESCRIPTION - A fluorene and pyrene derivative organic electroluminescent compound of formula R 1-A-L-B'-R 2(1) is new.    L=compounds of formulae (A)-(D);    A, B'=chemical bond or 6-60C arylene, 3-60C heteroarylene, 5- or 6-membered heterocycloalkylene containing heteroatom(s) including N, O or S, 3-60C cycloalkylene, 2-60C alkenylene, 2-60C alkynylene, 1-60C alkylenoxy, 6-60C arylenoxy, or 6-60C arylenethio;    R 1, R 2=H, halo, 1-60C alkyl, 6-60C aryl, 3-60C heteroaryl, 5- or 6-membered heterocycloalkyl containing heteroatom(s) including 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, (1-60C)alkylthio, CN, NR 3R 4, (6-60C)ar(1-60C)alkyl, (6-60C)aryloxy, (6-60C)arylthio, (6-60C)arylcarbonyl, (1-60C)alkoxycarbonyl, (1-60C)alkyl-carbonyl, carboxyl, NO 2or OH, or substituent including compounds of formulae (E)-(G).    Full Definitions are given in the DEFINITIONS (Full Definitions) Field. An INDEPENDENT CLAIM is included for an organic electroluminescent device comprising two electrodes and organic layer(s) interposed between the two electrodes. The organic layer comprises an electroluminescent region containing organic electroluminescent compound(s) (I), and dopant(s) including compounds of formulae (6)-(8).    R 201-R 204=H, halo, (1-60C)alkyl, (6-60C)aryl, (4-60C) heteroaryl, 5-or 6-membered heterocycloalkyl containing heteroatom(s) from 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, (1-60C)alkylthio, (6-60C)arylthio, (1-60C) alkoxycarbonyl, (1-60C)alkylcarbonyl, (6-60C)arylcarbonyl, carboxyl, NO 2or OH, or may be linked to adjacent substituent via (3-60C)alkylene or (3-60C)alkenylene with or without fused ring to form alicyclic ring, or monocyclic or polycyclic aromatic ring; where the alkenyl, alkynyl, (cyclo)alkyl, heterocycloalkyl, aryl, heteroaryl, arylsilyl, alkylsilyl, alkoxy, aryloxy, arylthio, alkylamino or arylamino, or alicyclic ring, or monocyclic or polycyclic aromatic ring formed by linkage to adjacent substituent via (3-60C)alkylene or (3-60C)alkenylene with(out) fused ring may be further substituted by substituent(s) from halo, (1-60C)alkyl, (6-60C) aryl, (4-60C)heteroaryl, 5- or 6-membered heterocycloalkyl containing heteroatom(s) selected from 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, (1-60C)alkylthio, (6-60C)arylthio, (1-60C)alkoxycarbonyl, (1-60C)alkylcarbonyl, (6-60C)arylcarbonyl, carboxyl, NO 2or OH;    Ar 1, Ar 2=(1-60C)alkyl, (6-60C)aryl, (4-60C)heteroaryl, (6-60C)arylamino, (1-60C)alkylamino, 5- or 6-membered heterocycloalkyl containing heteroatom(s) from N, O or S, or (3-60C)cycloalkyl, or may be linked via (3-60C)alkylene or (3-60C) alkenylene with(out) a fused ring to form alicyclic ring, or monocyclic or polycyclic aromatic ring; where aryl, heteroaryl, arylamino or heterocycloalkyl may be further substituted by substituent(s) from halo, 1-60C alkyl, 6-60C aryl or 4-60C heteroaryl, 5- or 6-membered heterocycloalkyl containing heteroatom(s) from 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, (1-60C)alkylthio, CN, (1-60C)alkylamino, (6-60C)arylamino, (6-60C)ar(1-60C)alkyl, (6-60C)aryloxy, (6-60C)arylthio, (6-60C)arylcarbonyl, (1-60C)alkoxycarbonyl, (1-60C)alkylcarbonyl, carboxyl, NO 2or OH;    Ar 3=(6-60C)arylene, (4-60C)heteroarylene or arylene of formula (a) or (b);    Ar 11=(6-60C)arylene or (4-60C)heteroarylene;    c, d=1-4; and    e=0 or 1.    The arylene or heteroarylene of Ar 3and Ar 11may be further substituted by substituent(s) from halogen, (1-60C)alkyl, (6-60C)aryl, (4-60C)heteroaryl, 5- or 6-membered heterocycloalkyl containing heteroatom(s) from 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, (1-60C)alkylthio, cyano, (1-60C)alkylamino, (6-60C)arylamino, (6-60C)ar(1-60C)alkyl, (6-60C)aryloxy, (6-60C)arylthio, (6-60C)arylcarbonyl, (1-60C)alkoxycarbonyl, (1-60C)alkylcarbonyl, carboxyl, nitro or hydroxyl.