NOVELTY - A heptacyclo-tricosa-octaene compound (I) is new.    USE - New heptacyclo-tricosa-octaene compound is used in organic electroluminescence device e.g. organic solar cell, organic photoconductor, organic transistor and monochromatic and white illumination device for electronic device (all claimed).    ADVANTAGE - The organic electroluminescence device obtained using the heptacyclo-tricosa-octaene compound has excellent luminous efficiency and durability, low drive voltage.    DETAILED DESCRIPTION - A heptacyclo-tricosa-octaene compound of formula (I) is new.    X,Y'=N, S or O;    Ar1=-L'-N(R'a)(R'b), or 6-60C aryl, fluorenyl, 2-60C heterocyclyl containing heteroatom chosen from O, N, S, Si and P, fused ring of 3-60C aliphatic ring and 6-60C aryl, 1-50C alkyl, 2-20C alkenyl, 2-20C alkynyl, 1-30C alkoxy or 6-30C aryloxy (all optionally substituted by X');    R1-R10=H, D, tritium, cyano, halo, -L'-N(R'a)(R'b), or 6-60C aryl, fluorenyl, 2-60C heterocyclyl containing heteroatom chosen from O, N, S, Si and P, fused ring of 3-60C aliphatic ring and 6-60C aryl, 1-50C alkyl, 2-20C alkenyl, 2-20C alkynyl, 1-30C alkoxy or 6-30C aryloxy (all optionally substituted by X');    L'=single bond, or 6-60C aryl, fluorenyl, 2-60C heterocyclyl containing heteroatom chosen from O, N, S, Si and P, or fused ring of 3-60C aliphatic ring and 6-60C aryl (all optionally substituted by X');    R'a,R'b=6-60C aryl, fluorenyl, 2-60C heterocyclyl containing heteroatom chosen from O, N, S, Si and P, fused ring of 3-60C aliphatic ring and 6-60C aryl (all optionally substituted by X');and    X'=halo, silyl, siloxane, boryl, Ge, cyano, nitro, 1-20C alkyl arylthio, 1-20C alkoxy, 1-20C alkyl, 2-20C alkenyl, 2-20C alkynyl, 6-20C aryl optionally substituted by D, fluorenyl, 2-20C heterocyclyl, 3-20C cycloalkyl, 7-20C arylalkyl or 8-20C aryl alkene.    (i) X and Y' are not simultaneously S; and (ii) Any of R1-R10 combines to form ring. INDEPENDENT CLAIMS are included for the following:    (1) organic electroluminescence device, which comprises heptacyclo-tricosa-octaene compound (I); and    (2) electronic apparatus, which comprises display device including organic electroluminescent device, and controller for driving display device.