eprintid: 10194990
rev_number: 7
eprint_status: archive
userid: 699
dir: disk0/10/19/49/90
datestamp: 2024-07-23 16:01:59
lastmod: 2024-07-23 16:01:59
status_changed: 2024-07-23 16:01:59
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Gómez, Germán Darío
creators_name: Günther, Florian Steffen
creators_name: Schroeder, Bob C
creators_name: Couto Faria, Gregório
title: Synthesis and polymerization of polyelectrolyte-based conductive inks: the protagonism of the coadjutant oxidizing salt
ispublished: inpress
divisions: UCL
divisions: B04
divisions: C06
divisions: F56
note: This version is the author-accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) has gained significant popularity as a material in both academic and industrial fields, especially due to the its vast application in electronic-based devices. However, despite its popularity and prominence in organic electronics, there is still a lack of scientific references regarding the synthesis and production of PEDOT:PSS inks. Here, we aim to discuss and elucidate the relationship between the conducting properties of PEDOT:PSS inks and the oxidizing agent concentration used during the oxidative polymerization of EDOT in the presence of PSS. To achieve this, we first studied the effect of addition of an oxidant to PSS solutions via dynamic light scattering (DLS) to characterize whether a higher oxidant concentration impacts the chain conformation of PSS in solution. Furthermore, we conducted UV-Vis spectroscopy measurements at various stages during the synthesis and purification of PEDOT:PSS to assess the formation of polarons and bipolarons. Finally, we evaluated the properties of deposited PEDOT:PSS films. Our findings demonstrate that the addition of an oxidant to PSS solutions leads to polyelectrolyte chain shrinkage, due to the screening of electrostatic interactions between the negatively charged sulfonate groups. Consequently, the likelihood of effective coupling between the PEDOT+ and PSS− counterparts is reduced due to the presence oxidant ions. This hypothesis was confirmed since inks polymerized with a higher oxidant concentration underwent depletion from bipolarons to polarons during the purification process as counterions originating from the oxidizing agent were removed.
date: 2024
date_type: published
publisher: Royal Society of Chemistry (RSC)
official_url: https://doi.org/10.1039/D4PY00574K
full_text_type: other
language: eng
verified: verified_manual
elements_id: 2298949
doi: 10.1039/d4py00574k
lyricists_name: Schroeder, Bob
lyricists_id: BCSCH40
actors_name: Schroeder, Bob
actors_id: BCSCH40
actors_role: owner
full_text_status: restricted
publication: Polymer Chemistry
issn: 1759-9954
citation:        Gómez, Germán Darío;    Günther, Florian Steffen;    Schroeder, Bob C;    Couto Faria, Gregório;      (2024)    Synthesis and polymerization of polyelectrolyte-based conductive inks: the protagonism of the coadjutant oxidizing salt.                   Polymer Chemistry        10.1039/d4py00574k <https://doi.org/10.1039/d4py00574k>.    (In press).   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10194990/1/Polymer_chemistry_accepted_manuscript.pdf