TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The organic semiconductor of n-type includes fullerenes and substituted fullerenes.    TECHNOLOGY FOCUS - POLYMERS - Preparation (Claimed): The preparation of (I) comprises reacting at least one monomer with each other and/or with at least one monomer including (R7-(Ar2)a-(Ac1)-(Ar3)c-R8) (VIII), (R7-Ar2-R8) (IX) and (R7-Ar4-R8) (X) in an aryl-aryl coupling reaction.Preferred Components: The polymer comprises carbamate group containing repeating unit (I), hetero(aryl) repeating units of formula (-(Ar2)a-(U1)b-(Ar3)c-(Ar4)d) (IIa) or (-(U1)b-(Ar2)a-(U1)b-(Ar3)c-(Ar4)d) (IIb), optionally substituted mono or polycyclic aryl or heteroaryl units of formula (-(Ar2)a-(Ar4)b-(Ar3)c-(Ar4)d-) (IIIa) or (-(Ar5)b-(Ar2)a-(Ar5)b-(Ar3)c-(Ar4)d) (IIIb), repeating unit of formula (-((A1)x-(B1)y-(G2)z)n-) (IV), preferably (-((Ar2-U1-Ar3)x-(Ar4)y)n-) (IVa), (-((Ar2-U1-Ar3)x-(Ar4-Ar4)y)n-) (IVb), (-((Ar2-U1-Ar3)x-(Ar4-Ar4-Ar4)y)n-) (IVc), (-((Ar2)a-(U1)b-(Ar3)c-(Ar4)d)n-) (IVd), (-(((Ar2)a-(U1)b-(Ar3)c-(Ar4)d)x-((Ar2)a-(Ar5)b-(Ar3)c-(Ar4)d)y)n-) (IVe), (-((U1-Ar2-U1)x-(Ar3-Ar4)y)n-) (IVf), (-((U1-Ar2-U1)x-(Ar3-Ar4-Ar3)y)n-) (IVg), (-((U1)b-(Ar2)a-(U1)b-(Ar3)c)n-) (IVh),(-(((U1)b-(Ar2)a-(U1)b-(Ar3)c)x-((Ac1)b-(Ar2)a-(Ar5)b-(Ar)d)y)n-) (IVi) or (-((U1-Ar2)x-(U1-Ar3)y-(U1-Ar3)z)n-) (IVk), (where (IVd) and (IVe), b is equal to 1). The polymer is nitrogen containing heteocyclic moieties of formulae (IVa1)-(IVa9). The polymer further comprises (R5-P1-R6) (VI). The monomer is (R7-Ar2-U1-Ar3-R8) (VIa1), (R7-U1-R8) (VIa2), (R7-A2-U1-R8) (VIa3), (R7-U1-Ar3-R8) (VIa4) or (R7-U1-Ar2-U1-R8) (VIa5). The mixture comprises the polymer, and at least one additional compound including electron acceptors or organic semiconductors of n-type.Ar4-Ar5 = 5-30C aryl or heteroaryl (which is different from U, and optionally substituted with at least Rs1), preferably G3;G3 = 1,4-phenylene, thiophene-2,5-diyl, selenophen-2,5-diyl, thieno(3,2-b)thiophen-2,5-diyl, thieno (2,3-b) thiophen-2,5-diyl, selenopheno-(3.2-b)-selenophen-2,5-diyl, selenopheno(2,3-b)-selenophen-2,5-diyl, selenopheno(3,2-b)-thiophen-2,5-diyl, selenopheno(2,3-b)-thiophen-2,5-diyl, benzo(1,2-b:4,5-b')-dithiophen-2,6-diyl, 2,2-dithiophene, 2,2-diselenophene, dithieno(3,2-b:2',3'-d)-silol-5,5-diyl, 4H-cyclopenta(2,1-b:3,4-b')-dithiophen-2,6-diyl, carbazol-27-diyl, fluorene-2,7-diyl, indaceno(1,2-b:5,6-b')dithiophen-2,7-diyl, benzo(1'',2'':4,5:4'',5'':4',5')-bis(silolo(3.2-b:3',2'-b')thiophene)-2,7-diyl, phenanthro(1,10,9,8-c,d,e,f,g)carbazol-2,7-diyl, benzo(2,1,3)-thiadiazol-4,7-diyl, benzo(2,1,3)-selenadiazole-4,7-diyl, benzo(2,1,3)-oxadiazol-4,7-diyl, 2H-benzotriazol-4,7-diyl, 3,4-difluorthiophen-2,5-diyl, thieno (3,4-b)-pyrazin-2,5-diyl, quinoxalin-5,8-diyl, thieno(3,4-b)-thiophen-4,6-diyl, thieno(3,4-b)-thiophen-6,4-diyl, 3,6-dithien-2-yl-pyrrolo(3,4-c)pyrrol-1,4-dioneor (1,3)-thiazolo-(5,4-d)(1,3)thiazol-2,5-diyl;Ac1 = not defined;Rs1 = F, Br, Cl, -CN, -NC, -NCO, -NCS, -OCN, SCN, -C(O)NR10R100, -C(O)X10, -C(O)R10, -NH2) -NR10R100, -SH, -SR10, -SO3H, -SO2R10, OH, - NO2, -CF3, -SF5, optionally substituted silyl or hydrocarbyl having 1-40C (optionally containing at least one heteroatom);X10 = halo, preferably F, Cl or Br;a, c = 0-2;b = 0-2, preferably 1;d = 0 or 1-10;A1, B1, G2 = (I), 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)thiadiazole-4,7-diyl)bis(thiophene-5,2-diyl), (IIa), (IIb), (IIIa) or (IIIb);x = greater than 0 to less than or equal to 1;y, z = greater than or equal to 0 to less than 1;x+y+z = 1;n = greater than 1;P1 = (IV), (IVa)-(IVk) or (IVa1)-(IVa7);R5, R6 = Rs1 or H, F, Br, Cl, I, -CH2Cl, -CHO, -CR'=C(R'')2, -SiR'R''R''', -SiR'X'X'' -SiR'R''X', SnR'R''R''', -BR'R'', -B(OR')(OR''), -B(OH)2, -O-SO2-R', -C(C)H, -C(C)-Si(R')3 or -ZnX';X', X'' = halo; andR', R'', R''' = R10, where at least two of R', R''and R''' are bonded with respective heteroatom to form a cyclosilyl-, cyclostannyl-, cycloboran- or cycloboronate group having 2-20C.Provided that: Ar1 is phenylene, which is optianlly substituted by (-NH-C(O)-OR1) and in which the polymer backbone is directly adjacent to an optionally substituted benzo(lmn)(3,8) phenanthrolin-1,3,6,8-tetraone-4,9-diyl unit; and Ar1 is pyrrolo(3,4-c)pyrrol-1,4-dione-3,6-diyl where both nitrogen atoms are substituted by (-C(O)-OR1). Preferred Definitions:    Ar2-Ar3 = G3.    EXAMPLE - (4.66 g 2-(2-Bromo-5-iodothiophen-3-yl)ethyl-(2-methylhexane-2-yl)carbonate 4.9 ml isopropylmagnesium solution and 27 mg (1,3-bis(diphenylphosphino)propane)nickel chloride were polymerized, fractional purification was performed using Soxhlet apparatus (methanol, acetone, chloroform) to obtain 1.02 g poly(2-(thiophen-3-yl)ethyl(2-methylhexane-2-yl)carbonate) of formula (XI) having number average molecular weight of 15.3 kDa in the acetone fraction.