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

• Record Type: Journal Article
• Authors: Glover, Carol Frances; Watson, Trystan; Bryant, Daniel; Williams, Geraint
• Is Part Of: ECS transactions. Volume 64:Number 42(2014)
• Page Start: 11
• Page End: 22
• Publication Date: 2015-02-10
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/06442.0011ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : The study of conducting polymers (CPs) is of high current interest due to their incorporation in a range of applications, including optical and electronic devices. Poly(3, 4-Ethylenedioxythiophene)-Poly(Styrene Sulphonate) (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. Therefore, an understanding of the interaction between the CP and various metals, in order to gauge the long term stability of the metal-CP interface, is of high importance. An in-situ scanning Kelvin probe (SKP) has been employed to measure the Volta potential differences of various PEDOT:PSS coated metal surfaces to identify instances where a reaction may be 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.