NOVELTY - A substituted triphenylene derivative (I) is new.    USE - As organic electroluminescent compound for organic electroluminescent device, white electroluminescent device, organic solar cell (claimed), and organic light-emitting diode device (OLED).    ADVANTAGE - The substituted triphenylene derivative is organic electroluminescent compound which exhibits excellent luminous efficiency and excellent life property of material, thus produces organic light-emitting diode device (OLED) having very good operation life; excellent electroluminescent property, longer device life and appropriate color coordinate, as compared to those of conventional dopant materials; and lowers the operation voltage to result in noticeable decrease in power consumption, with exhibiting at least comparable luminous efficiency as compared to conventional OLED's.    DETAILED DESCRIPTION - A substituted triphenylene derivative of formula (I) is new.    A' and B'=chemical bond, 6-60C arylene, 3-60C heteroarylene, 6-60C arylenoxy, 1-60C alkylenoxy, 6-60C arylenethio, 1-60C alkylenethio or 1-60C alkylene;    Ar1 and Ar2=H, deuterium, -N(R16)(R17), or group of formula (ia)-(ic), (preferably selected from 19 groups as given in the specification e.g. H, deuterium, -N(R16)(R17), 2,3-dihydro-benzo(1,4)thiazin-4-yl (substituted by R61), 2,3-dihydro-benzo(1,4)oxazin-4-yl (substituted by R61));    R61=H, deuterium, 1-60C alkyl or 6-60C aryl;    R1-R5, and R18-R30=G1 (optionally linked to an adjacent substituent via 3-60C alkylene or 3-60C alkenylene with or without a fused ring to form an alicyclic ring, or monocyclic or polycyclic aromatic ring);    G1=H, deuterium, halo, 1-60C alkyl, 6-60C aryl, 3-60C heteroaryl containing at least one heteroatom(A1), 5- or 6-membered heterocycloalkyl containing at least one heteroatom(A1), 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, cyano, 1-60C alkyl(6-60C)aryl, 6-60C ar(1-60C)alkyl, 1-60C alkyloxy, 1-60C alkylthio, 6-60C aryloxy, 6-60C arylthio, 1-60C alkoxycarbonyl, 1-60C alkylcarbonyl, 6-60C arylcarbonyl, carboxyl, nitro or hydroxyl;    A1=N, O or S;    R6-R15=G1, -N(R16)(R17), group of formula (ia)-(ic), (all optionally linked to an adjacent substituent via 3-60C alkylene or 3-60C alkenylene with or without a fused ring to form an alicyclic ring, or monocyclic or polycyclic aromatic ring);    R16 and R17=6-60C aryl, 3-60C heteroaryl containing at least one heteroatom(A1), group of formula (id) or (ie);    X and Y'=chemical bond, -(CR31R32)m-, -N(R33)-, -S-, -O-, -Si(R34)(R35)-, -P(R36)-, -C(=O)-, -B(R37)-, -In(R38)-, -Se-, -Ge(R39)(R40)-, -Sn(R41)(R42)-, -Ga(R43)- or -(R44)C=C(R45)-;    R31-R45=G1, 1-60C alkylamino, or 6-60C arylamino;    G2=halo, 1-60C alkyl, halo(1-60C)alkyl, 6-60C aryl, 3-60C heteroaryl, 5- or 6-membered heterocycloalkyl containing at least one heteroatom(A1), 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, cyano, carbazolyl, 1-60C alkylamino, 6-60C arylamino, 1-60C alkyl(6-60C)aryl, 6-60C ar(1-60C)alkyl, 1-60C alkyl(6-60C)aryl, 1-60C alkyloxy, 1-60C alkylthio, 6-60C aryloxy, 6-60C arylthio, 1-60C alkoxycarbonyl, 1-60C alkylcarbonyl, 6-60C arylcarbonyl, carboxyl, nitro or hydroxyl;    m=1-4.    The R31 and R32, R34 and R35, R39 and R40, R41 and R42, or R44 and R45 optionally linked via 3-60C alkylene or 3-60C alkenylene with or without a fused ring to form an alicyclic ring, or monocyclic or polycyclic aromatic ring. The arylene, heteroarylene, arylenethio, arylenoxy, alkylenoxy or alkylenethio of A' and B'; the alkyl, aryl, heteroaryl, heterocycloalkyl, cycloalkyl, alkylsilyl, arylsilyl, alkenyl, alkynyl, alkylamino or arylamino of R1-R45 optionally further substituted by at least one G2. Provided that:    (1) both X and Y' are not chemical bonds at same time; and    (2) at least one substituent among Ar1, Ar2, R6-R15 represents -N(R16)(R17), group of formula (ia)-(ic).    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 the compound (I) and at least one host selected from a compound of formula (Ar11)b-L1-(Ar12)c (II) or (Ar13)d-L2-(Ar14)e (III).    L1=6-60C arylene or 4-60C heteroarylene;    L2=anthracenylene;    Ar11-Ar14=4-60C heteroaryl, 5-60C cycloalkyl or 6-60C aryl (all optionally substituted by G3), H, deuterium, 1-60C alkyl, 1-60C alkoxy, or halo;    G3=6-60C aryl or 4-60C heteroaryl (optionally substituted by 1-60C alkyl (optionally substitute), 1-60C alkoxy, 3-60C cycloalkyl, halo, cyano, tri(1-60C) alkylsilyl, di(1-60C)alkyl(6-60C)arylsilyl, tri(6-60C)arylsilyl, 1-60C alkyl (optionally substitute), 1-60C alkoxy, 3-60C cycloalkyl, halo, cyano, tri(1-60C)alkylsilyl, di(1-60C)alkyl(6-60C)arylsilyl or tri(6-60C)arylsilyl;    b, c, d and e=0-4.