화학공학소재연구정보센터
Journal of the Electrochemical Society, Vol.162, No.10, H799-H805, 2015
A Scanning Kelvin Probe Investigation of the Interaction of PEDOT:PSS Films with Metal Surfaces and Potential Corrosion Protection Properties
The study of conducting polymers (CPs) is of high current interest due to their wide application in a range of optical and electronic devices. Poly(3,4-Ethylenedioxythiophene)-Poly(Styrene Sulfonate) (PEDOT:PSS) is considered one of the most electrochemically and thermally stable CPs currently available. In many applications there is a requirement for electrical contact to be made between an organic PEDOT:PSS layer and a metallic substrate. In order to gauge the long term stability of the metal-CP interface, an understanding of the interaction between the CP and various metals is of high importance. An in-situ scanning Kelvin probe (SKP) has been employed to measure the Volta potential differences of PEDOT:PSS-coated metals of interest in opto-electronic device manufacture, including Ni, Cu, Ag and Pt, with noble metals for comparison, to identify instances where a reaction is taking place at the interface. A redox potential of ca. -0.15 V vs. SHE has been shown where PEDOT:PSS is present in both oxidized and reduced form on the metal surfaces. (C) The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: [email protected]. All rights reserved.