Journal article

Publication year: 2007

Pages: 1843-1849

Journal: Physical Chemistry Chemical Physics

Volume number: 9

Issue number: 15

ISSN: 1463-9076

eISSN: 1463-9084

DOI Link: https://doi.org/10.1039/b617986j

Publisher: Royal Society of Chemistry

Abstract: 
The influence of the crystal orientation in porous crystalline films of ZnO electrodeposited on the photoelectrochemical characteristics of the films is studied. For differently oriented ZnO thin films following removal of the respective structure-directing agent (SDA) and adsorption of a sensitiser, time-resolved photocurrent measurements, intensity modulated photocurrent spectroscopy (IMPS), intensity modulated photovoltage spectroscopy (IMVS) and current-voltage curves were measured in acetonitrile-based electrolytes containing I3(-)/I- as the redox electrolyte. The crystal orientation has a significant influence on the charge transport across such films and hence is reflected in the observed electrode kinetics. Films originally grown in the presence of, e. g., Coumarin 343 as a SDA, showed a significantly faster response to illumination. Increased electron diffusion coefficients and diffusion lengths were calculated from the results of IMPS and IMVS, caused by a faster electron movement in the films. Implications of these findings on further improvements of sensitised ZnO films prepared by electrochemical deposition are discussed.

Harvard Citation style: Nonomura, K., Komatsu, D., Yoshida, T., Minoura, H. and Schlettwein, D. (2007) Dependence of the photoelectrochemical performance of sensitised ZnO on the crystalline orientation in electrodeposited ZnO thin films, Physical Chemistry Chemical Physics, 9(15), pp. 1843-1849. https://doi.org/10.1039/b617986j

APA Citation style: Nonomura, K., Komatsu, D., Yoshida, T., Minoura, H., & Schlettwein, D. (2007). Dependence of the photoelectrochemical performance of sensitised ZnO on the crystalline orientation in electrodeposited ZnO thin films. Physical Chemistry Chemical Physics. 9(15), 1843-1849. https://doi.org/10.1039/b617986j