Patent ID: 8398895

Claim:
A conjugated polymer, comprising at least one unit of formula I and at least one unit of formula II wherein R 1 on each occurrence identically or differently, denotes H, a straight-chain, branched or cyclic alkyl group having 1 to 40 C atoms, which is unsubstituted or substituted by one or more groups R, and in which one or more C atoms are optionally replaced by O, S, CO, CO—O, O—CO, O—CO—O, CR═CR or C≡C such that O- and/or S-atoms are not linked directly to each other, and in which one or more H atoms are optionally replaced by F, Cl, Br, I or CN, or R 1 denotes an aryl or heteroaryl group having 2 to 40 C atoms that is unsubstituted or substituted by one or more groups R, or a combination of a plurality of these groups; and wherein two groups R 1 may form a further mono- or polycyclic, aliphatic group with one another, R 2,3 independently of each other have one of the meanings given for R 1 , X, Y on each occurrence identically or differently, and independently of each other, denote CR═CR, C≡C or a divalent aryl or heteroaryl group having 2 to 40 C atoms that is unsubstituted or substituted by one or more groups R 1 , R is on each occurrence, identically or differently, H, a straight-chain, branched or cyclic alkyl or alkoxy group having 1 to 22 C atoms, in which one or more C atoms are optionally replaced by O, S, CO, CO—O, O—CO, O—CO—O, CR 0 ═CR 0 , C≡C such that O- and/or S-atoms are not linked directly to each other, and in which one or more H atoms are optionally replaced by F, Cl, Br, I or CN, or R is an aryl, heteroaryl, aryloxy or heteroaryloxy group having 5 to 40 C atoms that is unsubstituted or substituted by one or more non-aromatic group R 0 ; wherein two or more of the groups R may form a ring system with one another and/or with R 0 ; or R is F, Cl, Br, I, CN, Sn(R 0 ) 3 , Si(R 0 ) 3 or B(R 0 ) 2 , R 0 is on each occurrence, identically or differently, H or an aliphatic or aromatic hydrocarbon group having 1 to 20 C atoms; wherein two groups R 0 may form a ring together with the hetero atom to which they are attached, and a,b on each occurrence identically or differently, and independently of each other, denote 0, 1 or 2, wherein the polymer does not contain a diarylamine or triarylamine group.