Development of synthetically accessible glycolated polythiophenes for high-performance organic electrochemical transistors
Author(s)
Type
Journal Article
Abstract
Four glycolated polythiophene-based organic mixed ionic-electronic conductors (OMIECs), PE2gTT, PE2gT, PT2gTT, and PT2gT are prepared by atom-efficient direct arylation polymerization, avoiding the need for toxic organometallic precursors. PE2gT, PT2gTT, and PT2gT are operable in p-type accumulation mode organic electrochemical transistors (OECTs), with PT2gT displaying the best device performance with a µC* product figure-of-merit of 290 F cm−1 V−1 s−1. A record volumetric capacitance among p-type glycolated polythiophene OMIECs of 313 F cm−3 is observed for PE2gT, ascribed to the high proportionality of polar components in its materials design. The good OECT performance of PE2gT with µC* = 84.2 F cm−1 V−1 s−1, comparable with state-of-the-art poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) devices, coupled with its synthetic accessibility and favorable accumulation mode operation makes PE2gT an ideal glycolated alternative to PEDOT:PSS in bioelectronics. PE2gT with the least negative threshold voltage also displays the best OECT operational cycling stability, linked to better resistance of its oxidized state against parasitic redox side reactions . Shelf life stability of OECTs stored (without bias) is observed to be better for materials with a more negative threshold voltage and higher average molecular weight (PT2gT), that are less susceptible to ambient auto-oxidation and film delamination.
Date Issued
2024-04
Date Acceptance
2024-01-01
Citation
Advanced Electronic Materials, 2024, 10 (4)
ISSN
2199-160X
Publisher
Wiley Open Access
Journal / Book Title
Advanced Electronic Materials
Volume
10
Issue
4
Copyright Statement
© 2024 The Authors. Advanced Electronic Materials published by Wiley-VCH GmbH
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
License URL
Identifier
http://dx.doi.org/10.1002/aelm.202300580
Publication Status
Published
Article Number
2300580
Date Publish Online
2024-01-23