The impedance characteristics of poly[4,4 ' -bis(butylsulfanyl)-2,2 ' -bithiophene] film electrode are studied at different p-doping levels. The impedance features can be coherently described modeling the polymer deposit by a 'generalized transmission line circuit', using different simplifications when dealing with different oxidation states. Through these simplifications, the parameters of the equivalent circuit can be calculated The deviation of the impedance plots of the oxidized state from the Warburg-impedance 45 degrees slope in the mid-frequency domain is attributed to a non-uniform ionic conductivity profile within the polymer film. The analysis of the plots suggests the high-frequency semicircle, detectable in the case of both the neutral and the p-doped polymer to be due to the ion transfer barrier at the polymer/solution interface.

Impedance Characteristics of Poly(4,4’- Bis(butylsulfanyl)-2,2’-bithiophene) Film Electrode as a Function of Different Oxidation Levels / Hongbo, Ding; Zhongxiao, Pan; Laura, Pigani; Seeber, Renato; Pigani, Laura. - In: JOURNAL OF NEW MATERIALS FOR ELECTROCHEMICAL SYSTEMS. - ISSN 1480-2422. - STAMPA. - 4:2(2001), pp. 61-67.

Impedance Characteristics of Poly(4,4’- Bis(butylsulfanyl)-2,2’-bithiophene) Film Electrode as a Function of Different Oxidation Levels

SEEBER, Renato;PIGANI, Laura
2001

Abstract

The impedance characteristics of poly[4,4 ' -bis(butylsulfanyl)-2,2 ' -bithiophene] film electrode are studied at different p-doping levels. The impedance features can be coherently described modeling the polymer deposit by a 'generalized transmission line circuit', using different simplifications when dealing with different oxidation states. Through these simplifications, the parameters of the equivalent circuit can be calculated The deviation of the impedance plots of the oxidized state from the Warburg-impedance 45 degrees slope in the mid-frequency domain is attributed to a non-uniform ionic conductivity profile within the polymer film. The analysis of the plots suggests the high-frequency semicircle, detectable in the case of both the neutral and the p-doped polymer to be due to the ion transfer barrier at the polymer/solution interface.
2001
4
2
61
67
Impedance Characteristics of Poly(4,4’- Bis(butylsulfanyl)-2,2’-bithiophene) Film Electrode as a Function of Different Oxidation Levels / Hongbo, Ding; Zhongxiao, Pan; Laura, Pigani; Seeber, Renato; Pigani, Laura. - In: JOURNAL OF NEW MATERIALS FOR ELECTROCHEMICAL SYSTEMS. - ISSN 1480-2422. - STAMPA. - 4:2(2001), pp. 61-67.
Hongbo, Ding; Zhongxiao, Pan; Laura, Pigani; Seeber, Renato; Pigani, Laura
File in questo prodotto:
File Dimensione Formato  
impedenza _JNMES_2001.pdf

Accesso riservato

Tipologia: Versione pubblicata dall'editore
Dimensione 306.57 kB
Formato Adobe PDF
306.57 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
impedenza _JNMES_2001.pdf

Accesso riservato

Tipologia: Versione dell'autore revisionata e accettata per la pubblicazione
Dimensione 306.57 kB
Formato Adobe PDF
306.57 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/609448
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 9
  • ???jsp.display-item.citation.isi??? 30
social impact