Thieno-indeno-monomers and polymers

Polymers comprising at least one unit of formulae 1 or 1' and compounds of the formulae 2 or 2' wherein, in formulae 1, 1', 2 and 2', n is 0, 1, 2, 3 or 4, m is 0, 1, 2, 3 or 4, M1 and M2 are independently of each other an aromatic or heteroaromatic monocyclic or bicyclic ring system; X is at each occurrence selected from the group consisting of O, S, Se or Te, Q is at each occurrence selected from the group consisting of C, Si or Ge, R is at each occurrence selected from the group consisting of hydrogen, C 1-100 -alkyl, C 2-100 -alkenyl, C 2-100 -alkynyl, C 5-12 -cycloalkyl, C 6-18 -aryl, a 5 to 20 membered heteroaryl, C(O)-C 1-100 -alkyl, C(O)-C 5-12 -cycloalkyl and C(O)-OC 1-100 -alkyl. R 2 , R 2' , R 2" , R * are at each occurrence independently selected from the group consisting of hydrogen, C 1-30 -alkyl, C 2-30 -alkenyl, C 2-30 -alkynyl, C 5-12 -cycloalkyl, C 6-18 -aryl, 5 to 20 membered heteroaryl, OR 21 , OC(O)-R 21 , C(O)-OR 21 , C(O)-R 21 , NR 21 R 22 , NR 21 -C(O)R 22 , C(O)-NR 21 R 22 ,N[C(O)R 21 ][C(O)R 22 ], SR 21 , halogen, CN, SiR Sis R Sit R Siu and OH, L 1 and L 2 are independently from each other and at each occurrence selected from the group consisting of C 6-30 -arylene, 5 to 30 membered heteroarylene, (A) (B) and (C).