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High operational and environmental stability of high-mobility conjugated polymer field-effect transistors achieved through the use of molecular additives
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Nikolka, Mark, Nasrallah, Iyad, Rose, Bradley, Ravva, Mahesh Kumar, Broch, Katharina, Harkin, David, Charmet, Jérôme, Hurhangee, Michael, Brown, Adam, Illig, Steffen, Too, Patrick, Jongman, Jan, McCulloch, Iain, Bredas, Jean-Luc and Sirringhaus, Henning (2017) High operational and environmental stability of high-mobility conjugated polymer field-effect transistors achieved through the use of molecular additives. Nature Materials, 16 (3). pp. 356-362. doi:10.1038/nmat4785
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Official URL: https://doi.org/10.1038/nmat4785
Abstract
Due to their low-temperature processing properties and inherent mechanical flexibility, conjugated polymer field-effect transistors (FETs) are promising candidates for enabling flexible electronic circuits and displays. Much progress has been made on materials performance; however, there remain significant concerns about operational and environmental stability, particularly in the context of applications that require a very high level of threshold voltage stability, such as active-matrix addressing of organic light-emitting diode displays. Here, we investigate the physical mechanisms behind operational and environmental degradation of high-mobility, p-type polymer FETs and demonstrate an effective route to improve device stability. We show that water incorporated in nanometre-sized voids within the polymer microstructure is the key factor in charge trapping and device degradation. By inserting molecular additives that displace water from these voids, it is possible to increase the stability as well as uniformity to a high level sufficient for demanding industrial applications.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QD Chemistry T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science > Chemistry | ||||||||
| Library of Congress Subject Headings (LCSH): | Field-effect transistors, Conjugated polymers | ||||||||
| Journal or Publication Title: | Nature Materials | ||||||||
| Publisher: | Nature Publishing Group | ||||||||
| ISSN: | 1476-1122 | ||||||||
| Official Date: | March 2017 | ||||||||
| Dates: |
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| Date of first compliant deposit: | 17 November 2016 | ||||||||
| Volume: | 16 | ||||||||
| Number: | 3 | ||||||||
| Page Range: | pp. 356-362 | ||||||||
| DOI: | 10.1038/nmat4785 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Funder: | Innovate UK, Engineering and Physical Sciences Research Council (EPSRC), FlexEnable Ltd., Deutsche Forschungsgemeinschaft (DFG), King Abdullah University of Science and Technology (KAUST), United States. Office of Naval Research | ||||||||
| Grant number: | PORSCHED project (Innovate UK), EP/M005141/1 (EPSRC), BR4869/1-1 (DFG)), Competitive Research Grant program (KAUST), Award N62909-15-1-2003 (United States. Office of Naval Research) | ||||||||
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