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Dynamic impedance measurements on a thin-film poly-3-methylthiophene electrode: Memory effects and space charge formationстатья
Информация о цитировании статьи получена из
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Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 7 ноября 2016 г.
- Авторы: Semenikhin O.A., Ovsyannikova E.V., Alpatova N.M., Rotenberg Z.A.
- Журнал: Journal of Electroanalytical Chemistry
- Том: 408
- Номер: 1-2
- Год издания: 1996
- Издательство: Elsevier Sequoia
- Местоположение издательства: Switzerland
- Первая страница: 67
- Последняя страница: 75
- DOI: 10.1016/0022-0728(95)04505-8
- Аннотация: A new procedure for measuring electrochemical impedance spectra directly during potential cycling is presented. The method consists in taking a series of impedance-potential curves at different potential modulation frequencies. Then the impedance values at desired electrode potentials are sampled, and corresponding dynamic impedance spectra are reconstructed. The method was applied to a thin-film poly-3-methylthiophene \Pt (P3MT\Pt) electrode in an acetonitrile solution. The results suggested that undoping of the polymer at negative potentials gave rise to development of a space-charge region within the film that hindered the polymer doping process unless flat-band conditions were reached. Such behavior could account for a well-known memory effect observed in conducting polymers. Moreover, our data provide further evidence that illumination of a P3MT electrode at negative potentials results in photoelectrochemical undoping of the polymer.
- Добавил в систему: Семенихин Олег Александрович