Evaluation of (E)-1,2-di(furan-2-yl)ethene as building unit in diketopyrrolopyrrole alternating copolymers for transistors

Alternating copolymers, poly(2,5-bis(2-decyltetradecyl)-3,6-di(furan-2-yl) pyrrolo[3,4-c] pyrrole-1,4(2H, 5H)-dione-b-(E)-1,2-di(furan-2-yl) ethene) (P(FDPP-FVF)) and poly(2,5-bis(2-decyltetradecyl)-3,6-di(thiophen2- yl) pyrrolo[3,4-c] pyrrole-1,4(2H, 5H)-dione-b-(E)-1,2-di(furan-2-yl) ethene) (P(ThDPP-FVF)), composed of (E)-1,2-di(furan-2-yl) ethene and diketopyrrolopyrrole, were synthesized and studied for solution-processable organic field effect transistors (OFETs). Highest hole mobilities of 0.45 and 0.24 cm(2) V-1 s(-1) were measured for P(FDPP-FVF) and P(ThDPP-FVF), respectively, in bottom gate-bottom contact transistor devices. Atomic force microscopy and grazing incidence X-ray diffraction experiments were employed to investigate the crystallinity and morphology for the spin-cast polymer films. It is noteworthy that the thermally annealed P(FDPP-FVF) film exhibited higher crystallinity and small pi-stacking distance of 3.47 angstrom. Moreover, considering the easy synthesis from renewable furfural and better performance of P(FDPP-FVF), our results provide an alternative design strategy for the synthesis of solution-based semiconducting polymers from renewable furan derivatives for OFETs.