Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (12): 1395-1398.doi: 10.3866/PKU.WHXB20051213

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A Photoelectrochemical Study of the Nanostructured TiO2 /P3HT Film Electrode

HAO Yan-Zhong;CAI Chun-Li   

  1. College of Science;2College of Chemical & Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018
  • Received:2005-05-17 Revised:2005-08-15 Published:2005-12-15
  • Contact: HAO Yan-Zhong

Abstract: The photon-current conversion properties of ITO/poly(3-hexylthiophene) (ITO/P3HT) and nanostructured TiO2/P3HT film electrode were studied by using the photocurrent action spectra, the photocurrent dependence of potential and UV-Vis absorption spectra. The bandgap of P3HT film is 1.89 eV. The diagram of energy level of P3HT film was determined with cyclic voltammetry and photoelectrochemical method. The conduction band of P3HT film is -5.4 eV. The nanostructured TiO2/P3HT electrode can enlarge the visible optical absorption region and obviously increase the photocurrent in visible region. The p-n heterojunction exists in the TiO2/P3HT nanostructured electrode which favors the separation of electron/hole pairs. Thus, the photon-electron conversion efficiency could be improved.

Key words: Nanostructured TiO2/P3HT electrode, Photoelectrochemistry, Poly(3-hexylthiophene)