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Effects of Cationic Species in Salts on the Electrical Conductivity of Doped PEDOT:PSS Films

Li, X; Liu, Z; Zhou, Z; Gao, H; Liang, G; Rauber, D; Kay, CWM; (2021) Effects of Cationic Species in Salts on the Electrical Conductivity of Doped PEDOT:PSS Films. ACS Applied Polymer Materials 10.1021/acsapm.0c01084. (In press).

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Abstract

The electrical conductivity of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films with four salts that have various cations but the same bis(trifluoromethanesulfonyl)amide (TFSI) anion was studied. We found that doping salts of small-sized cations led to better conductivity because of the improved crystalline order and p-doped level of PEDOT, as revealed by the grazing-incidence wide-angle X-ray scattering (GIWAXS) and UV-vis spectrum. This phenomenon can be rationalized with the fact that small-sized cations with stronger Coulombic interactions can lead to high doping and rearrangement of PEDOT:PSS. These findings will help to develop recipes based on the PEDOT:PSS/salt composite toward the applications for printed flexible electronics.

Type: Article
Title: Effects of Cationic Species in Salts on the Electrical Conductivity of Doped PEDOT:PSS Films
DOI: 10.1021/acsapm.0c01084
Publisher version: https://doi.org/10.1021/acsapm.0c01084
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: https://discovery.ucl.ac.uk/id/eprint/10119138
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