Photoelectrochemical properties and microstructuring of polythiophenesстатья

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[1] Photoelectrochemical properties and microstructuring of polythiophenes / O. A. Semenikhin, C. Stromberg, M. R. Ehrenburg et al. // Electrochimica Acta. — 2001. — Vol. 47, no. 1-2. — P. 171–180. Photoelectrochemical microstructuring processes have been applied to various classes of semiconductors and especially to intrinsically conducting polymers such as polythiophenes. In this work, a new technique was developed for photoelectrochemical post-structuring of conducting polymers deposited on Pt and p-Si. The surface of a conducting polymer is illuminated with a focused laser beam in a non-aqueous solution in the presence of tetrabutylammonium (TBA) salts. This results in local photoelectrochemical cathodic doping of the polymer and corresponding conductivity increase. Poly-3-phenylthiophene (P3PhT) and polybithiophene (PBT) were investigated in this work. In the case of P3PhT, colourless conducting films are formed, and the post-structuring process could be visualised using conventional optical microscopy. The obtained micropatterns were stable in air and in the anodic doping region, but could be removed by repeated cycling in a potential range including both anodic and cathodic doping. The microstructures were characterised by SEM, EDAX, SECM and other techniques. (C) 2001 Elsevier Science Ltd. All rights reserved. [ DOI ]

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