Rodriguez, A.B., Tomlinson, M.R., Khodabakhsh, S. et al. (7 more authors) (2013) All-polymer field-effect transistors using a brush gate dielectric. Journal of Materials Chemistry C, 1 (46). 7736 - 7741. ISSN 2050-7526
Abstract
Interfaces between a poly(3-hexylthiophene) [P3HT] and an end-grafted (brush) layer of poly(methyl methacrylate) [PMMA] are shown using neutron reflectometry to be dependent on heat treatment. Annealing the samples allows part of the brush layer to cross into the P3HT layer creating a very asymmetric interface. We suggest that the P3HT rearrangement occurs, creating space for movement of the brush into the film. This interpenetration was observed with two different molecular weight (17.5 and 28 kg mol�1) P3HT films. Output characteristics of devices made from P3HT layers on PMMA brushes show that different amounts of heat treatment do not significantly change the device performance. Saturated hole mobilities are dependent on heat treatment, with devices made from a smaller molecular weight P3HT (22 kg mol�1) demonstrating larger mobilities than devices created using 48 kg mol�1 P3HT, but only after heat treatment.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2013 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Funding Information: | Funder Grant number EPSRC GR/S96920/01 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 24 Jun 2014 13:52 |
Last Modified: | 24 Jun 2014 13:52 |
Published Version: | http://dx.doi.org/10.1039/c3tc31076k |
Status: | Published |
Publisher: | Royal Society of Chemistry |
Refereed: | Yes |
Identification Number: | 10.1039/c3tc31076k |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:79517 |