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

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• 作者：A. Jolt Oostra ; Karel H. W. van den Bos ; Paul W. M. Blom ; Jasper J. Michels
• 刊名：Journal of Physical Chemistry B
• 出版年：2013
• 出版时间：September 19, 2013
• 年：2013
• 卷：117
• 期：37
• 页码：10929-10935
• 全文大小：300K
• 年卷期：v.117,no.37(September 19, 2013)
• ISSN：1520-5207

文摘

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 (<0.01%) to a high (>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.