Electrochemical Analysis of PEDOT in Acetonitrile Solutions of Ionic Liquids for Active IR Technologies
Year: 2025
Type: article
Abstract: ABSTRACT This study provides the analysis of poly(3,4‐ethylenedioxythiophene) (PEDOT) films via secondary doping for operation in electrochromic devices using ionic liquids, acetonitrile‐based solutions of ionic liquids, and their mixtures for ideal operation electrochemically. For this purpose, PEDOT:Tos films were electrochemically reduced and oxidized with these electrolytes, containing various dopants (TFSI, OTf, BF4, PF6, and Cl) and their combinations, forming dual‐doped PEDOT films. OTf proved to be an excellent dopant for enhancing the dynamic range (Δε = 0.12). Electrochemically oxidized PEDOT:PF6/BF4 resulted in both the highest doping level (30.1%) and conductivity (3500 S/cm) with a dynamic range of Δε = 0.10, demonstrating the advantage of incorporating multiple dopant anions. In addition, the use of PF6 in conjunction with other dopants, such as BF4, demonstrated distinct doping behaviors from multiple dopants, as observed from electrochemical analysis. This results present usefulness of PEDOT outside of IR modulation in areas such as ion sensing.
DOI: 10.1002/app.56867
Language: English
Subfield: Polymers and Plastics
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,140
OpenAlex ID: W4407557061