TY - JOUR AB - In this article we discuss the synthesis of four new low band-gap co-polymers based on the diketopyrrolopyrrole (DPP) and benzotriazole (BTZ) monomer unit. We demonstrate that the BTZ unit allows for additional solubilizing side-chains on the co-monomer and show that the introduction of a linear side-chain on the DPP-unit leads to an increase in thin-film order and charge-carrier mobility if a sufficiently solubilizing, branched, side chain is attached to the BTZ. We compare two different synthetic routes, direct arylation and Suzuki-polycondensation, by a direct comparison of polymers obtained via the two routes and show that direct arylation produces polymers with lower electrical performance which we attribute to a higher density of chain Furthermore we demonstrate that a polymer utilizing this design motif and synthesized via Suzuki-polycondensation ((l-C18)-DPP-(b-C17)-BTZ) exhibits exceptionally high and near balanced average electron and hole mobilities >2 cm2 V−1 s−1 which are among the highest, robustly extracted mobility values reported for DPP copolymers in a top-gate configuration to date. Our results demonstrate clearly that linear side chain substitution of the DPP unit together with co-monomers that allow for the use of sufficiently long or branched solubilizing side chains can be an attractive design motif for solution processable, high mobility DPP copolymers. AU - Gruber,M AU - Jung,S-H AU - Schott,S AU - Venkateshvaran,D AU - Kronemeijer,AJ AU - Andreasen,JW AU - McNeill,CR AU - Wong,WWH AU - Shahid,M AU - Heeney,M AU - Lee,J-K AU - Sirringhaus,H DO - 10.1039/c5sc01326g EP - 6960 PY - 2015/// SN - 2041-6539 SP - 6949 TI - Enabling high-mobility, ambipolar charge-transport in a DPP-benzotriazole copolymer by side-chain engineering T2 - Chemical Science UR - http://dx.doi.org/10.1039/c5sc01326g UR - http://hdl.handle.net/10044/1/41006 VL - 6 ER -