Journal article
Enabling high-mobility, ambipolar charge-transport in a DPP-benzotriazole copolymer by side-chain engineering
M Gruber, SH Jung, S Schott, D Venkateshvaran, AJ Kronemeijer, JW Andreasen, CR McNeill, WWH Wong, M Shahid, M Heeney, JK Lee, H Sirringhaus
Chemical Science | Published : 2015
DOI: 10.1039/c5sc01326g
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 performa..
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Grants
Awarded by Engineering and Physical Sciences Research Council
Funding Acknowledgements
The authors gratefully acknowledge funding from the Engineering and Physical Sciences Research Council (EPSRC) through a program grant (EP/G060738/1). J.K.L. and S.H.J. thank the National Research Foundation of Korea (Grant No. 2011-0012274) funded by the Korean government (MEST). C.R.M. acknowledges support from the Australian Research Council (FT100100275). This research was undertaken in part on the SAXS/WAXS beamline at the Australian Synchrotron, Victoria, Australia. C.R.M. thanks Dr Nigel Kirby of the Australian Synchrotron for technical assistance and Dr Eliot Gann for assistance with data analysis.