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Influence of PEDOT:PSS crystallinity and composition on electrochemical transistor performance and long-term stability
Gwangju Inst Sci and Technol, South Korea.
Gwangju Inst Sci and Technol, South Korea; Gwangju Inst Sci and Technol, South Korea; Gachon Univ, Peoples R China.
Gwangju Inst Sci and Technol, South Korea.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering. Gwangju Inst Sci and Technol, South Korea.
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2018 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 9, article id 3858Article in journal (Refereed) Published
Abstract [en]

Owing to the mixed electron/hole and ion transport in the aqueous environment, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)-based organic electrochemical transistor has been regarded as one of the most promising device platforms for bioelectronics. Nonetheless, there exist very few in-depth studies on how intrinsic channel material properties affect their performance and long-term stability in aqueous environments. Herein, we investigated the correlation among film microstructural crystallinity/composition, device performance, and aqueous stability in poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) films. The highly organized anisotropic ordering in crystallized conducting polymer films led to remarkable device characteristics such as large transconductance (similar to 20 mS), extraordinary volumetric capacitance (113 F.cm(-3)), and unprecedentedly high [mu C*] value (similar to 490 F.cm(-1) V-1 s(-1)). Simultaneously, minimized poly(styrenesulfonate) residues in the crystallized film substantially afforded marginal film swelling and robust operational stability even after amp;gt;20-day water immersion, amp;gt;2000-time repeated on-off switching, or high-temperature/pressure sterilization. We expect that the present study will contribute to the development of long-term stable implantable bioelectronics for neural recording/stimulation.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP , 2018. Vol. 9, article id 3858
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Materials Chemistry
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URN: urn:nbn:se:liu:diva-151778DOI: 10.1038/s41467-018-06084-6ISI: 000445270100005PubMedID: 30242224OAI: oai:DiVA.org:liu-151778DiVA, id: diva2:1254066
Note

Funding Agencies|National Research Foundation of Korea (NRF) - Ministry of Science and ICT [NRF-2017R1A2B4003873, NRF-2018M3A7B4070988, NRF-2018M3D1A1051602]

Available from: 2018-10-08 Created: 2018-10-08 Last updated: 2018-11-12

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