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Type: Artigo de periódico
Title: Effect of the electrolyte cations and anions on the photocurrent of dodecylsulphate doped polypyrrole films
Author: Martini, M
De Paoli, MA
Abstract: Photoelectrochemical and UV-Vis spectroelectrochemical measurements were performed in a three-electrode cell containing dodecylsulphate-doped polypyrrole films as active layers in contact with different aqueous electrolytes. The effect of both cations and anions of the electrolyte on the photocurrent generation and on the absorption spectra of the system was studied. Dynamic photocurrent and absorption spectra measurements performed during the redox cycles of the films show that both cation and anion insertion and deinsertion occurs during the cycles. These results are in agreement with the previously reported redox mechanism proposed for amphiphilic anion doped polypyrrole. Reduced films show cathodic photocurrent at -0.4 > E > -0.8 V vs. Ag\AgCl. Photocurrent voltammograms are reproducible after the conditioning of the films and the higher cathodic currents were observed in films with thickness of similar to0.05-0.5 mum. (C) 2002 Elsevier Science B.V. All rights reserved.
Subject: intrinsically conducting polymer
photoelectrochemical measurement
band model
photocurrent voltammetry
absorption spectroscopy
Country: Holanda
Editor: Elsevier Science Bv
Citation: Solar Energy Materials And Solar Cells. Elsevier Science Bv, v. 73, n. 3, n. 235, n. 247, 2002.
Rights: fechado
Identifier DOI: 10.1016/S0927-0248(01)00133-7
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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