A Scanning Kelvin Probe Investigation of the Interaction of PEDOT:PSS Films with Metal Surfaces and Potential Corrosion Protection Properties. Issue 10 (1st January 2015)

• Record Type: Journal Article
• Authors: Glover, C. F.; McGettrick, J.; Williams, G.; Watson, T. M.; Bryant, D.
• Is Part Of: Journal of the Electrochemical Society. Volume 162:Issue 10(2015)
• Page Start: H799
• Page End: H805
• Publication Date: 2015-01-01
• Subjects: Conducting Polymer -- Opto-electronics -- PEDOT:PSS -- Scanning Kelvin probe; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0761510jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : 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.