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. 2019 Jul 10;10:3044. doi: 10.1038/s41467-019-11073-4

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — Schematic material-view of a PEDOT:PSS OECT. The polymeric channel is depicted by PEDOT-rich grains (dark blue) hosted by a PSS-rich matrix (gray). The zoom shows the ionic–electronic interaction in the PEDOT:PSS channel. Fixed anions in the PSS polyelectrolyte (blue cubes) are electrostatically compensated both by holes in the PEDOT semiconductor (red h⁺) at the PEDOT/PSS interface and by mobile cations (red spheres) in the bulk of the PSS