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Photocurrent and differential capacity measurements at polybithienyl and poly(3-butylthiophene) films

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Abstract

Photocurrent and differential capacity measurements have been carried out at polybithienyl (PBT) and poly(3-butylthiophene) (PBuT) films on platinum. The photocurrents are cathodic, similar to inorganic p-type semiconductors. The band gap energy was determined from the photocurrent spectra (E g=1.7 eV for PBT and E g=1.9 eV for PBuT). The dependence of the differential capacity on the potential could be presented as Mott-Schottky plot, at least in a limited potential region. The flatband potential was determined (E fb= 0.67 V for PBT and E fb=0.58 V for PBuT).

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Authors and Affiliations

  1. Institute for Organic Chemistry, Free University, Berlin, Germany P. Schmidt-Zhang, , , , , , DE

    Wenfang Zhang & G. Kossmehl

  2. Forschungsinstitut sensorik Greifswald e.v. Brandteichstrustse 19 17489 Greifswald, , , , ,

    P. Schmidt-Zhang

  3. Institute for Physical Chemistry and Electrochemistry, Dresden University of Technology, Mommsenstrasse 13, D-01062 Dresden, Germany e-mail: plieth@cech01.chm.tu-dresden.de, , , , , , DE

    W. Plieth

Authors
  1. Wenfang Zhang
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  2. P. Schmidt-Zhang
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  3. G. Kossmehl
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  4. W. Plieth
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Received: 9 June 1998 / Accepted: 22 August 1998

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Zhang, W., Schmidt-Zhang, P., Kossmehl, G. et al. Photocurrent and differential capacity measurements at polybithienyl and poly(3-butylthiophene) films. J Solid State Electrochem 3, 135–140 (1999). https://doi.org/10.1007/s100080050139

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  • DOI: https://doi.org/10.1007/s100080050139

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