Disruption of the Electrical Conductivity of Highly Conductive Poly(3,4-ethylenedioxythiophene): Poly(styrene sulfonate) by Hypochlorite

A. Jolt Oostra, Karel H.W. van den Bos, Paul W.M. Blom, Jasper J. Michels

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Abstract

The effect of hypochlorite treatment on the layer thickness and conductivity of a state-of-the-art high conducting poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is investigated as a function of exposure time and hypochlorite concentration. Because of overoxidation by the hypochlorite the PEDOT:PSS conductivity is decreased by 10 orders of magnitude. Comparison of thickness and conductivity as a function of time shows that a residual insulating layer remains on the substrate upon treatment. Going from a low (0.1%) hypochlorite concentration the interaction between PEDOT:PSS and hypochlorite changes from reaction- to diffusion limited. The decrease in conductivity can be interpreted in terms of the interruption of percolating conductive pathways by the reaction between PEDOT and hypochlorite.
Original languageEnglish
Pages (from-to)10929-10935
Number of pages7
JournalThe Journal of Physical Chemistry B
Volume117
Issue number37
DOIs
Publication statusPublished - 2013

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