Electrochemical and photoelectrochemical behaviour of poly-3-methylthiophene and polybithiophene in non-aqueous solutions: 1. Dark and light processes in systems with and without cathodic doping |
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| Authors: | OA Semenikhin EV Ovsyannikova NM Alpatova ZA Rotenberg VE Kazarinov |
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| Institution: | A.N. Frumkin Institute of Electrochemistry, Russian Academy of Sciences, Leninskii Prospekt 31, 117071 Moscow, Russia |
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| Abstract: | The electrochemical as well as the photoelectrochemical behaviour of poly-3-methylthiophene and polybithiophene in systems with and without the possibility of cathodic doping was studied. Using electrochemical impedance measurements it was demonstrated that in both types of systems the photoelectrochemical processes on such polymers involved photoelectrochemical undoping of the polymer itself as well as the photoelectrochemical reduction of a component of an external redox couple in the solution. In systems with cathodic doping, in addition to these two processes, photoassisted cathodic doping of the polymer is observed. The model of photoelectrochemical processes on polymer electrodes is discussed. |
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| Keywords: | Electron-conducting polymers Polybithiophene Poly-3-methylthiophene Photoelectrochemistry Electrochemical impedance spectroscopy Photocurrent |
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