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APL Mat. 3, 014911 (2015).
Shiming Zhang, Prajwal Kumar, Amel Sarah Nouas, Laurie Fontaine, Hao Tang, Fabio Cicoira.
Department of Chemical Engineering, Polytechnique Montreal, Montreal, Québec H3C 3J7, Canada.
Abstract
Organic electrochemical transistors based on the conducting polymer poly(3,4-ethylenedioxythiophene) doped with poly(styrenesulfonate) (PEDOT:PSS) are of interest for several bioelectronic applications. In this letter, we investigate the changes induced by immersion of PEDOT:PSS films, processed by spin coating from different mixtures, in water and other solvents of different polarities. We found that the film thickness decreases upon immersion in polar solvents, while the electrical conductivity remains unchanged. The decrease in filmthickness is minimized via the addition of a cross-linking agent to the mixture used for the spin coating of the films.
