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Charge transport physics of a unique class of rigid-rod conjugated polymers with fused ring conjugated units linked by double carbon-carbon bonds

Published version
Peer-reviewed

Type

Article

Change log

Authors

Xiao, Mingfei 
Sirringhaus, Henning  ORCID logo  https://orcid.org/0000-0001-9827-6061

Abstract

We investigate the charge transport physics of a novel class of electron deficient conjugated polymers that do not contain any single bonds linking monomer units along the backbone, but only double bond linkages. Such polymers would be expected to behave as rigid rods but little is known about their actual chain conformations and electronic structure. Here we present a detailed study of the structural and charge transport properties of a family of four such polymers. Small angle neutron scattering provides evidence for a highly rigid chain conformation. By adopting a copolymer design we achieve high electron mobilities up to 0.5 cm2V-1s-1. Field-induced ESR measurements of charge dynamics provide evidence for relatively slow hopping over, however, long distances. Our work provides important insights into the factors that limit charge transport in this unique class of polymers and allow us to identify molecular design strategies for achieving even higher levels of performance.

Description

Keywords

3403 Macromolecular and Materials Chemistry, 34 Chemical Sciences

Journal Title

Science Advances

Conference Name

Journal ISSN

2375-2548
2375-2548

Volume Title

Publisher

American Association for the Advancement of Science
Sponsorship
Engineering and Physical Sciences Research Council (EP/M005143/1)
Engineering and Physical Sciences Research Council (EP/P032591/1)
European Research Council (610115)
EPSRC support for the project from EP/M005143/1.