NOVELTY - Conjugated polymer comprising at least one repeating unit having carbonate group and carbamate group substitutents, is new. Provided that polymer does not contains at least one carbamate substituted phenylene units and directly adjacent to optionally substituted benzo(lmn)(3,8)phenanthrolin-1,3,6,8-tetraone-4,9-diyl unit, and does not contains pyrrolo(3,4-c)pyrrole-1,4-dione-3,6-diyl units, in which both nitrogen atoms are substituted with a carbonyl group.    USE - The polymer, mixture, polymer blends and the composition are useful as charge transport-, semiconductor-, electrically conducting-, photoconducting- or light emitting material in optical-, electrooptical-, electronic-, electroluminescent- and photoluminescent device, preferably organic field effect transistors, organic thin film transistors, organic light emitting diodes, organic light emitting transistors, organic photovoltaic component devices, organic photodetectors, organic solar cells, Schottky diodes, laser diodes, and organic photoconductor, in a component of the device, preferably charge injection layers, charge transport layers, intermediate layers, planarization layers, antistatic films, polymer electrolyte membranes, conducting substrates and conducting patterns, and a product containing the device, preferably integrated circuits , condensers, radio frequency identification tags, radio frequency identification tags containing security markings or safety devices, flat panel displays, backlights for displays, electrophotographic devices, electrophotographic recording devices, organic memory devices, sensor devices, biosensors and biochips, in batteries, and in components or devices for detecting and differentiating DNA sequences (all claimed).    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a mixture or polymer blend comprising the above polymer and at least one compound or polymer having semiconductor-, charge transport-, hole/electron transport-, hole/electron blocking-, electrically conducting-, photoconducting- or light emitting properties;    (2) a composition comprising the polymer, mixture or polymer blends, and at least one solvent including organic solvent;    (3) organic field effect transistors, organic photovoltaic component devices, organic solar cells and organic photodetectors, where the organic semiconductor forms a volume heterojunction in the photoactive layer;    (4) partially or completely removing carbonate or carbamate of the polymer, comprising heating the polymer, or a layer containing the polymer to less than 200 degrees C;    (5) monomers of formula (R7-(Ar2)a-U1-(Ar3)c-R8) (VIa) or (R7-U1-(Ar2)a-U1-R8) (VIb); and    (6) preparation of the polymer.    Ar2-Ar3 = 5-30C aryl or heteroaryl (which is different from U, and optionally substituted with at least Rs1);    U1 = (-Ar1(-G1-X1-C(=O)-O-R1)-) of formula (I) or X15;    X15 = thiophene-2,5-diyl, 9H-fluorene-2,7-diyl, 9-methyl-9H-fluorene-2,7-diyl, 9H-carbazole-2,7-diyl, 5H-dibenzo(b,d)silole-3,7-diyl, 5-methyl-5H-dibenzo(b,d)silole-3,7-diyl, 4H-cyclopenta(2,1-b:3,4-b')dithiophen-2,6-diyl, 5-methyl-4H-cyclopenta(2,1-b:3,4-b')dithiophen-2,6-diyl, 5,5'-(benzo(c)(1,2,5)thiadiazol-4,7-diyl)bis(thiophene-5,2-diyl), 1,3,6,8-tetraoxo-1,2,3,6,7,8-hexahydrobenzo(lmn)(3,8)phenanthroline-4,9-diyl, 5,5'-(1,3,6,8-tetraoxo-1,2,3,6,7,8-hexahydrobenzo(lmn)(3,8)phenanthroline-4,9-diyl)bis(thiophene-5,2-diyl), nitrogen containing heterocyclic moieties of formulae (Ia), (Ib) or (Ic);    R4a = 1-25 alkyl, preferably 2-methylhexyl or 9-methylheptadecyl;    Ar1 = mono- or polycyclic aryl or heteroaryl (both optioanlly substituted by at least one position), preferably X15;    G1 = 2-20C alkylene (optionally mono- or polysubstituted by F, Cl, Br, I or CN, at least one non-adjacent CH2 is optionally replaced by -O-, -S-, -NH-, -NR10-, -SiR10R100-, -CO-, -COO-, -OCO-, - OCO-O-, -S-CO-, -CO-S-, -CR10=CR100- or -C=C-, and O and/or S atoms are not linked directly to one another) or single bond, preferably -(CH2)m-;    m = 0 or 1-12, preferably 2-6;    X1 = NR10 or O, (where if remainder G1-X1-C(O)-OR1 is bonded to a N-atom in the Ar1, and remainder G1-X1 may represent a single bond);    R10, R100 = H or 1-12C alkyl;    R1 = R1a, R1b or R1c;    R1a, R1b, R1c = H, 1-25C straight-chain, branched or cyclic alkyl, straight-chain, branched or cyclic alkenyl or alkynyl having 2-25C, where two of R1a, R1b and R1c are fused together to form a cyclic alkyl, alkenyl or alkynyl having 5-12C, preferably 2-methylhexan-2-yl, 9-methylheptadecan-9-yl, 3-methylbut-1-en-3-yl, 1-methylcyclohexyl, 1-butylcyclopentyl, (-C(CH3)2-CH=CH-R4) (Ia), 3-ethylpentan-3-yl, (-C(CH3)2-CH=C(R4)2) (Ib), 1-methylcyclohex-2-enyl, (-C(CH3)-C(C)-R4) (Ic) or 1-ethynylcyclopentyl moiety of formula (Id);    R4 = H or 1-25C alkyl;    R4a = 1-25C alkyl, preferably 2-methylhexyl oder 9-methylheptadecyl;    R7, R8 = Cl, Br, I, O-tosylate, O-triflate, O-mesylate, O-nonaflate, -SiMe2F, -SiMeF2, -O-SO2Z1, -B(OZ2)2, -CZ3=C(Z3)2, -C(C)H, - C(C)Si(Z1)3, -ZnX10 or Sn(Z4)3;    X10 = halo, preferably Cl, Br or I; and    Z1-Z4 = alkyl or aryl (both optionally substituted, and two Z2 groups are bonded with B and O atoms to form cycloboronate group having 2-20C, excluding monomer (VIa), where a and c is equal to zero, and U1 with a carbamate substituted phenylene-2,5-diyl).    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the top gate/bottom-contact organic field effect transistors.    Glass substrate (1)    Source and drain electrode (2)    Active semiconductor layer (3)    Dielectric (4)    Gate electrode (5)