NOVELTY - A thiophene compounds (I)-(III), are new.    USE - New thiophene compounds used as organic semiconductors in formation of semiconducting film used as hole-transport layer or electron-transport layer for organic electronic devices e.g. organic photovoltaic device, organic light emitting device and organic field effect transistor (all claimed). Uses include but are not limited to transistors, organic light-emitting diode, radio frequency identification tags and display backplanes for e-readers.    ADVANTAGE - The thiophene compounds have excellent semiconducting properties.    DETAILED DESCRIPTION - A thiophene compounds of formulae, A-D' (I), A-D'A (II) and D'-A'-D' (III), are new.    D'=monovalent electron donor group, preferably based on furan or furan derivatives, pyrrole or pyrrole derivatives, thiophene, bithiophene or thiophene derivatives like thienothiophene, dithienothiophene or dithienopyrrole, more preferably based on bithiophene;    A=monovalent electron acceptor group based on compounds of formulae (a)-(k);    A'=divalent electron acceptor group based on compounds (a)-(k);    D'=divalent electron donor group, preferably based on furan or furan derivatives, pyrrole or pyrrole derivatives, thiophene, bithiophene or thiophene;    X,X'=O or S;    Y1-Y4=N or P;    R1,R1'=H, 1-30c hydrocarbyl or 1-30C heterohydrocarbyl;    R2,R3,R2',R3'=H, halo, 1-20C hydrocarbyl or 1-20C heterohydrocarbyl;    or R2+R3,R2'+R3'=optionally substituted 2 or 6-membered carbocyclyl, heterocyclyl, aryl or heteroaryl;and    E1,E2=optionally substituted 5- or 6-membered aryl or heteroaryl.    INDEPENDENT CLAIMS are included for the following:    (1) use of thiophene compound (I) as organic semiconductors in one layer(s) of organic electronic devices;    (2) oligomer or homo- or copolymer, which comprises moieties or indole repeating units of formula (IV);    (3) composition, which comprises a compounds (a)-(k) or compounds (I)-(III) or oligomer, homo- or copolymer as electron acceptor and an electron donor compound; and    (4) semiconducting film.