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|Type:||Artigo de periódico|
|Title:||Photoelectrochemical Response In Conducting Polymer Films|
De Paoli M.-A.
|Abstract:||The photoelectrochemical responses of electrochemically prepared polyaniline, polypyrrole and poly(3-methylthiophene) polymer films were studied. For polyaniline, the behavior of the photocurrent was analyzed with respect to the nature and concentration of the electrolyte solution, wavelength of the incident light and type of working electrode. Polyaninile shows a cathodic photocurrent in the reduced state and an anodic photocurrent in the oxidized state, indicating a transition from p-type to n-type semiconductor behavior. Chemically prepared polyaniline deposited by solution evaporation onto a gold substrate and covered with an aluminum layer shows a photocurrent comparable to a commercial photodiode. Polypyrrole and poly(3-methylthiophene) show characteristic cathodic photocurrent responses in the reduced state when irradiated with pulsed light, indicating a p-type semiconductor behavior. © 1994.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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