Enabling high-mobility, ambipolar charge-transport in a DPP-benzotriazole copolymer by side-chain engineering.

ABSTRACT: 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 utiliz

SUBMITTER: Gruber M 

PROVIDER: S-EPMC5951104 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature