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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 ISSN 1476-1122.

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Official URL: https://doi.org/10.1038/nmat4785

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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
Subjects: Q Science > QD Chemistry
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science, Engineering and Medicine > 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:
DateEvent
March 2017Published
12 December 2016Available
23 September 2016Accepted
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
Date of first compliant deposit: 17 November 2016
Date of first compliant Open Access: 12 June 2017
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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