Polymers comprising structural units which contain alkylalkoxy groups, blends comprising these polymers, and opto-electronic devices comprising these polymers and blends

A polymer comprising, as structural unit Z, an aromatic or heteroaromatic ring system, where at least one H atom of said aromatic or heteroaromatic ring system is substituted by an alkylalkoxy group A which is bonded to said aromatic or heteroaromatic ring system via a C atom of the alkylalkoxy group and where said aromatic or heteroaromatic ring system is substituted by one or more substituents R1 wherein

• R1 is in each case, independently of one another, a bond to a further structural unit or denotes H, D, F, Cl, Br, I, N(R2)2, N(Ar)2, C(═O)Ar, P(═O)Ar2, S(═O)Ar, S(═O)2Ar, CR2═CR2Ar, CN, NO2, Si(R2)3, B(OR2)2, OSO2R2, a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 40 C atoms or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 40 C atoms, each of which is optionally substituted by one or more radicals R2, where one or more non-adjacent CH2 groups is optionally replaced by R2C═CR2, Si(R2)2, Ge(R2)2, Sn(R2)2, C═O, C═S, C═Se, C═NR2, P(═O)(R2), SO, SO2, NR2, O, S or CONR2 and where one or more H atoms is optionally replaced by F, Cl, Br, I, CN or NO2, or an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms, which optionally in each case is substituted by one or more radicals R2, or an aryloxy or heteroaryloxy group having 5 to 40 aromatic ring atoms, which is optionally substituted by one or more radicals R2, or a combination of these systems;
• where, in addition, two or more substituents R optionally forms a mono- or polycyclic, aliphatic or aromatic ring system with one another, and
• R2 is in each case, independently of one another, H or an aliphatic or aromatic hydrocarbon radical having 1 to 20 C atoms and wherein the alkylalkoxy group A is bonded to the aromatic or heteroaromatic ring system via an aromatic or heteroaromatic group Ar,
• and wherein the structural unit Z is selected from the group consisting of substituted or unsubstituted trans-indenofluorene, benzo-trans-indenofluorene, dibenzo-trans-indenofluorene, cis-indenofluorene, benzo-cis-indenofluorene, dibenzo-cis-indenofluorene, spirobifluorene, dihydrophenanthrene, phenanthrene, dibenzofuran, benzofluorene, benzochromene, dibenzooxepine and anthracene and wherein, the alkylalkoxy group A conforms to the formula —Arn—(CR2)m—O—(CR2)0—Ox—(CR2)p—CR3, in which R can adopt, independently of one another, identically or differently, one of the meanings indicated for R1 and in which individual CR2 groups is optionally replaced by alkenyl, alkynyl, aryl or heteroaryl groups, n≧0, m>0, o≧0, x is 0 and p≧0.