| abstract |
The present invention relates to a thin-film semiconductor comprising a compound of formula I or II , wherein R and R are each independently selected from C 1-30 alkyl , C 2-30 alkenyl , C 2-30 alkenyl, C 2-30 30 alkynyl and C 1-30 haloalkyl, R 3 , R 4 , R 5 and R 6 are independently H or an electron-withdrawing group, wherein at least one of R 3 , R 4 , R 5 and R 6 is an electron-withdrawing group electronic groups; and contain non-conductive polymers. |