NOVELTY - A condensed polycyclic aromatic compound (I), is new.    USE - New condensed polycyclic aromatic compound is used for solution for manufacturing organic-semiconductor film used for organic-semiconductor device (all claimed) e.g. thin-film transistor and solar cell.    ADVANTAGE - The condensed polycyclic aromatic compound has excellent solubility with respect to organic solvent.    DETAILED DESCRIPTION - A condensed polycyclic aromatic compound of formula (I), is new.    Q1,Q2,A1-A4=H, halo, 1-20C alkyl, 2-20C alkenyl, 2-20C alkynyl, optionally substituted 4-20C aromatic group, 2-10C ketone, 1-20C amino, 1-20C amide, 1-20C imide, 1-20C sulfide, or 1-40C alkylsilyl alkynyl, where at least one of Q1 and Q2 is group other than H and halo;    B'=optionally substituted condensed ring having at least one benzene-ring portion;    Y'=chalcogen;and    or two of A1-A4=optionally substituted 4-20C aromatic group.    INDEPENDENT CLAIMS are included for the following:    (1) condensed polycyclic aromatic compound-containing solution, which contains an organic solvent and condensed polycyclic aromatic compound (I) which is partially dissolved in organic solvent;    (2) manufacture of organic-semiconductor film, which involves coating solution to base material and removing organic solvent from solution;    (3) organic-semiconductor device;    (4) condensed polycyclic aromatic compound of formula (IIa);    (5) synthesis of condensed polycyclic aromatic compound (IIa), which involves providing composition containing condensed polycyclic aromatic compound of formula (IIIa) and organic solvent, and adding halogen to composition;    (6) aromatic polymer, which has two or more portions comprising condensed polycyclic aromatic compound (I);    (7) synthesis of aromatic polymer, which involves providing composition containing condensed polycyclic aromatic compound (I) and organic solvent, adding joint compound having substitutable portion comprising two or more halogen atoms to composition and processing mixture by Mizoroki-Heck reaction, Negishi coupling, Migita-Kosugi-Stille coupling, Sonogashira coupling, Suzuki-Miyaura coupling, Buchwald-Hartwig reaction and/or Kumada-Tamao-Corriu coupling and mutually combining 2 or more condensed polycyclic aromatic compounds;    (8) aromatic polymer-containing solution, which contains aromatic polymer which is partially dissolved in organic solvent and organic solvent;    (9) synthesis of aldehyde-containing compound of formula (b), which involves reducing cyano group of cyano group-containing compound of formula (i);    (10) synthesis of thiophene-containing compound of formula (x), which involves condensing two molecules of aldehyde-containing compound (b);    (11) cyano group-containing compound (i);    (12) sulfur-containing compound of formula (g);    (13) hydroxyl group-containing compound of formula (n);    (14) carboxyl group-containing compound of formula (m);    (15) triflate group-containing compound (XX); and    (16) synthesis of condensed polycyclic aromatic compound (I).    Tf=triflate group;    X1-X4,A5-A8,E1,E2=H, halo, 1-20C alkyl, 2-20C alkenyl, 2-20C alkynyl, 4-20C optionally substituted aromatic group, 2-10C ketone, 1-20C amino, 1-20C amide, 1-20C imide, 1-20C sulfide or 1-40C alkylsilyl alkynyl, where at least one X1 and X2 is halo and at least one of E1 and E2 is H;    or two of A1-A8 and X1-X4=4-20C optionally substituted aromatic group;and    R=1-20C alkyl, 2-20C alkenyl, 2-20C alkynyl, 4-20C optionally substituted aromatic group, 2-10C ketone, 1-20C amino, 1-20C amide, 1-20C imide, 1-20C sulfide or 1-40C alkylsilyl alkynyl.