Polymers with asymmetric repeating units

A polymer comprising at least one structural unit of formula (I):

• wherein
• A is a polycyclic aromatic or heteroaromatic ring system having 10 to 60 aromatic or heteroaromatic ring atoms and which is optionally substituted by one or more R radicals;
• B is a mono- or polycyclic, aromatic or heteroaromatic ring system having 5 to 10 aromatic or heteroaromatic ring atoms and which is optionally substituted by one or more R radicals;
• wherein the number of aromatic or heteroaromatic ring atoms in A is greater than the number of aromatic or heteroaromatic ring atoms in B;
• Ar1, Ar2, Ar3, and Ar4
• are the same or different in each instance and are a mono- or polycyclic, aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms and which is optionally substituted by one or more R radicals;
• n, m, o, and p
• are the same or different and are each 0 or 1;
• R is the same or different in each instance and is H, D, F, Cl, Br, I, N(R1)2, CN, NO2, Si(R1)3, B(OR1)2, C(═O)R1, P(═O)(R1)2, S(═O)R1, S(═O)2R1, OSO2R1, a straight-chain alkyl, alkoxy, or thioalkoxy group having 1 to 40 carbon atoms or a branched or cyclic alkyl, alkoxy, or thioalkoxy group having 3 to 40 carbon atoms, each of which is optionally substituted by one or more R1 radicals, wherein one or more nonadjacent CH2 groups are optionally replaced by R1C═CR1, C≡C, Si(R1)2, C═O, C═S, C═NR1, P(═O)(R1), SO, SO2, NR1, O, S, or CONR1 and wherein one or more hydrogen atoms are optionally replaced by D, F, Cl, Br, I, or CN, or a mono- or polycyclic, aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms and which is optionally substituted in each case by one or more R1 radicals, or an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms and which is optionally substituted by one or more R1 radicals, or an aralkyl or heteroaralkyl group having 5 to 60 aromatic ring atoms and which is optionally substituted by one or more R1 radicals, or a diarylamino group, diheteroarylamino group, or arylheteroarylamino group having 10 to 40 aromatic ring atoms and which is optionally substituted by one or more R1 radicals, or a crosslinkable Q group;
• and wherein two or more R radicals together optionally define a mono- or polycyclic, aliphatic, aromatic, and/or benzofused ring system;
• R1 is the same or different in each instance and is H, D, F, or an aliphatic hydrocarbyl radical having 1 to 20 carbon atoms, an aromatic and/or a heteroaromatic hydrocarbyl radical having 5 to 20 carbon atoms, wherein one or more hydrogen atoms are optionally replaced by F;
• and wherein two or more R1 substituents together optionally define a mono- or polycyclic, aliphatic, aromatic, or heteroaromatic ring system;
• and
• the dotted lines denote bonds to adjacent structural units in the polymer.