NOVELTY - Organic electroluminescent benzo(c)phenanthrene compounds are new.    USE - For preparing organic electroluminescent device (OLED), and organic solar cell (claimed). The OLED include full-colored display devices.    ADVANTAGE - The organic electroluminescent benzo(c)phenanthrene compounds (I) exhibit high luminous efficiency, and excellent color purity with appropriate color coordinate and life property of the material; and provide organic electroluminescent device (OLED) having very good operation life and high luminous efficiency.    DETAILED DESCRIPTION - Organic electroluminescent benzo(c)phenanthrene compounds of formula (I) are new.    R1 to R10=T1, NR11R12, or a substituent selected from groups of formulae (i) to (xii);    T1=H, deuterium, halo, 1-60C alkyl, 6-60C aryl, 3-60C heteroaryl, morpholino, thiomorpholino, 5- or 6- membered heterocycloalkyl containing at least one heteroatom selected from N, O, S and Si, 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, (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;    R11 and R12=H, deuterium, 1-60C alkyl, 3-60C cycloalkyl, 6-60C aryl, or 3-60C heteroaryl;    R13 to R30=T1, 1-60C alkylamino, or 6-60C arylamino;or    each of R13 to R25 optionally linked to adjacent substituent via 3-60C alkylene or 3-60C alkenylene optionally with a fused ring=alicyclic ring, or monocyclic or polycyclic aromatic ring;    X and Y'=chemical bond, or -C(R31)(R32)-, -N(R33)-, -S-, -O-, -Si(R34)(R35)-, -P(R36)-, -C(=O)-, -B(R37)-, -In(R38)-, -Se-, -Ge(R39)(R40)-, -Sn(R41)(R42)-, -Ga(R43)0, or -(R44)C=C(R45)-;    R31 to R45=T1, 1-60C alkylamino, or 6-60C arylamino;or    R31+R32, R34+R35, R39+R40, R41+R42, or R44+R45 optionally linked via 3-60C alkylene or 3-60C alkenylene optionally with a fused ring=alicyclic ring, or monocyclic or polycyclic aromatic ring;    a=0-4.    The alkyl, (hetero)aryl, (hetero)cycloalkyl, trialkylsilyl, dialkylarylsilyl, triarylsilyl, adamantyl, bicycloalkyl, alkenyl, alkynyl, aralkyl, alkyloxy, alkylthio, aryloxy, arylthio, alkylamino, arylamino, alkoxycarbonyl, alkylcarbonyl, and arylcarbonyl of R1 to R45 are optionally further substituted by at least one substituent selected from T1 where 1-60C alkyl is optionally substituted by halo substituent(s) and 3-60C heteroaryl is optionally substituted by 6-60C aryl substituent(s); 1-60C alkylamino, and 6-60C arylamino. Provided that: R1 to R10 are not H all at the same time. An INDEPENDENT CLAIM is included for an organic electroluminescent device which is comprised of first electrode, second electrode, and at least one organic layer interposed between the first and second electrodes, comprising: the organic electroluminescent compound (I) in the organic layer, and at least one dopant selected from a substituted perylene compound of formula (II); 9-benzothiazol-2-yl-1,1,6,6-tetramethyl-2,3,5,6-tetrahydro-1H,4H-11-oxa-3a-aza-benzo(de)anthracen-10-one (III); Ar13-(-N(Ar11)(Ar12))d (IV); and M1L101L102L103 (V).    R101 through R104=T1, 1-60C alkylamino, or 6-60C arylamino;    Ar11 and Ar12=e.g. 1-60C alkyl, 6-60C aryl, 4-60C heteroaryl;    d=1, or 2;    Ar13=e.g. 6-60C aryl; aryl of formula (xiii), R110-C?=C-Ar22- (xiv), or aryl of formula (xv); or arylene of formula (xiiia), -C?=C-Ar22- (xiva), or arylene of formula (xva);    Ar21 and Ar22=6-60C arylene, or 4-60C heteroarylene;    R110, R111 and R112=H, deuterium, 1-60C alkyl, or 6-60C aryl;    e=1-4;    f=0 or 1;    M1=a group consisting of metals from Group 7, 8, 9, 10, 11, 13, 14, 15 and 16 of the Periodic Table of elements;    ligands L101, L102 and L103=a group selected from groups of formulae (xvi) to (xxxxi);    R201 to R203=e.g. H, 1-60C alkyl (optionally substituted by halo substituent (s)), halo;    R204 to R219=e.g. H, 1-60C alkyl, 1-30C alkyloxy;    R226=e.g. 1-60C alkyl, 5-60C heteroaryl, halo;    Q'=a group of formula -C(R301)( R302)-, -C(R303)( R304)-C(R305)( R306)-, or -C(R307)( R308)-C(R309)( R310)-C(R311)( R312)-;    R220 to R225, R227 to R229 and R301 to R312=e.g. H, deuterium, 1-60C alkyl.    Full Definitions are given in the DEFINITIONS (Full Definitions) section.