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2D coherent charge transport in highly ordered conducting polymers doped by solid state diffusion
Publication available at: | https://www.repository.cam.ac.uk/handle/1810/254962 |
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Title: | 2D coherent charge transport in highly ordered conducting polymers doped by solid state diffusion |
Authors: | Kang, K Watanabe, S Broch, K Sepe, A Brown, A Nasrallah, I Nikolka, M Fei, Z Heeney, M Matsumoto, D Marumoto, K Tanaka, H Kuroda, SI Sirringhaus, H |
Item Type: | Journal Article |
Abstract: | Doping is one of the most important methods to control charge carrier concentration in semiconductors. Ideally, the introduction of dopants should not perturb the ordered microstructure of the semiconducting host. In some systems, such as modulation-doped inorganic semiconductors or molecular charge transfer crystals, this can be achieved by spatially separating the dopants from the charge transport pathways. However, in conducting polymers, dopants tend to be randomly distributed within the conjugated polymer, and as a result the transport properties are strongly affected by the resulting structural and electronic disorder. Here, we show that in the highly ordered lamellar microstructure of a regioregular thiophene-based conjugated polymer, a small-molecule p-type dopant can be incorporated by solid state diffusion into the layers of solubilizing side chains without disrupting the conjugated layers. In contrast to more disordered systems, this allows us to observe coherent, free-electron-like charge transport properties, including a nearly ideal Hall effect in a wide temperature range, a positive magnetoconductance due to weak localization and the Pauli paramagnetic spin susceptibility. |
Issue Date: | 9-May-2016 |
Date of Acceptance: | 30-Mar-2016 |
URI: | http://hdl.handle.net/10044/1/35967 |
DOI: | 10.1038/nmat4634 |
ISSN: | 1476-4660 |
Publisher: | Nature Publishing Group |
Start Page: | 896 |
End Page: | 902 |
Journal / Book Title: | Nature Materials |
Volume: | 15 |
Copyright Statement: | © 2016 Macmillan Publishers Limited. All rights reserved. The final publication is available at Springer via https://doi.org/10.1038/nmat4634 |
Keywords: | Science & Technology Physical Sciences Technology Chemistry, Physical Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics FIELD-EFFECT TRANSISTORS ORGANIC SEMICONDUCTORS IMPURITY CONDUCTION TRANSFER INTERFACES HOPPING TRANSPORT METALLIC STATE POLYACETYLENE POLYANILINE POLY(3,4-ETHYLENEDIOXYTHIOPHENE) MAGNETORESISTANCE Nanoscience & Nanotechnology |
Publication Status: | Published |
Open Access location: | https://www.repository.cam.ac.uk/handle/1810/254962 |
Online Publication Date: | 2016-05-09 |
Appears in Collections: | Chemistry Faculty of Natural Sciences |