Patent ID: 8586684

Claim:
A conjugated copolymer comprising >50 mol % and ≦90 mol % of one or more identical or different units of formula I and >0 mol % and <50 mol % of one or more identical or different units of formula II wherein one of A and A′ is a single bond and the other is CR 1 R 2 , one of B and B′ is a single bond and the other is CR 3 R 4 , R 1-4 are independently of each other identical or different groups selected from H, halogen, —CN, —NC, —NCO, —NCS, —OCN, —SCN, —C(═O)NR 0 R 00 , —C(═O)X, —C(═O)R 0 , —NH 2 , —NR 0 R 00 , —SH, —SR 0 , —SO 3 H, —SO 2 R 0 , —OH, —NO 2 , —CF 3 , —SF 5 , optionally substituted silyl, or a straight-chain, branched or cyclic alkyl with 1 to 40 C-atoms which is unsubstituted or mono- or polysubstituted by F, Cl, Br, I or CN, and wherein one or more non-adjacent CH 2 groups are each optionally replaced, independently from one another, by —O—, —S—, —NH—, —NR 0 —, —SiR 0 R 00 —, —CO—, —COO—, —OCO—, —O—CO—O—, —S—CO—, —CO—S—, —SO 2 —, —CO—NR 0 —, —NR 0 —CO—, —NR 0 —CO—NR 00 —, —CY 1 ═CY 2 — or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another, Y 1 and Y 2 are independently of each other H, F, Cl or CN, X is halogen, R 0 and R 00 are independently of each other H or an optionally substituted carbyl or hydrocarbyl group optionally comprising one or more hetero atoms, Ar is a single bond or denotes mononuclear or polynuclear aryl or heterorayl, m is 1, Y is N, P, P═O, PF 2 , P═S, As, As═O, As═S, Sb, Sb═O or Sb═S, Ar 1 which may be the same or different, denote, independently if in different repeat units, a single bond or an optionally substituted mononuclear or polynuclear aryl group, Ar 2 which may be the same or different, denote, independently if in different repeat units, an optionally substituted mononuclear or polynuclear aryl group, Ar 3 which may be the same or different, denote, independently if in different repeat units, an optionally substituted mononuclear or polynuclear aryl group, which may be optionally substituted by a bridging group linking different chain residues of formula II, and k is 1, 2 or 3, and R 4 wherein optionally the groups R 1 and R 2 and/or the groups R 3 and R 4 together with the adjacent fluorene moiety form a spiro group.