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

Content Provider	Royal Society of Chemistry (RSC)
Author	McNeill, Christopher R. Heeney, Martin Wong, Wallace W. H. Gruber, Mathias Jung, Seok-Heon Schott, Sam Lee, Jin-Kyun Andreasen, Jens Wenzel Venkateshvaran, Deepak Shahid, Munazza Kronemeijer, Auke Jisk Sirringhaus, Henning
Copyright Year	2015
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 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.
Starting Page	6949
Ending Page	6960
Page Count	12
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	6
Issue Number	12
Journal	Chemical Science
DOI	10.1039/c5sc01326g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	DPP BTZ Polymer Aryl Monomer Benzotriazole
Content Type	Text
Resource Type	Article
Subject	Chemistry

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