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Oekermann T, Yoshida T, Boeckler C, et al. Capacitance and field-driven electron transport in electrochemically self-assembled nanoporous ZnO/dye hybrid films. J Phys Chem B. 2005;109(25):12560-6doi: 10.1021/jp051394p.
Oekermann, T., Yoshida, T., Boeckler, C., Caro, J., & Minoura, H. (2005). Capacitance and field-driven electron transport in electrochemically self-assembled nanoporous ZnO/dye hybrid films. The journal of physical chemistry. B, 109(25), 12560-6. https://doi.org/10.1021/jp051394p
Oekermann, Torsten, et al. "Capacitance and field-driven electron transport in electrochemically self-assembled nanoporous ZnO/dye hybrid films." The journal of physical chemistry. B vol. 109,25 (2005): 12560-6. doi: https://doi.org/10.1021/jp051394p
Oekermann T, Yoshida T, Boeckler C, Caro J, Minoura H. Capacitance and field-driven electron transport in electrochemically self-assembled nanoporous ZnO/dye hybrid films. J Phys Chem B. 2005 Jun 30;109(25):12560-6. doi: 10.1021/jp051394p. PMID: 16852553.
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J Phys Chem B. 2005 Jun 30;109(25):12560-6. doi: 10.1021/jp051394p.

Capacitance and field-driven electron transport in electrochemically self-assembled nanoporous ZnO/dye hybrid films.

The journal of physical chemistry. B

Torsten Oekermann, Tsukasa Yoshida, Cathrin Boeckler, Jürgen Caro, Hideki Minoura

Affiliations

  1. Institute of Physical Chemistry and Electrochemistry, University of Hannover, Callinstrasse 3-3A, 30167 Hannover, Germany. [email protected]

PMID: 16852553 DOI: 10.1021/jp051394p

Abstract

Electrodeposited nanoporous ZnO/eosin Y hybrid films have been investigated in view of their potential applications in dye-sensitized solar cells and supercapacitors. Intensity-modulated photocurrent spectra were measured at different electrode potentials at films of different thicknesses. It was found that the results represent either the RC constant of the cell and surface recombination of photogenerated holes with electrons or the diffusion of photogenerated electrons and are dependent on the electron concentration in the ZnO, which is influenced by the film thickness, the electrode potential, and the light intensity. The results suggest that the porosity of the electrodeposited ZnO increases with the film thickness and the films therefore consist of two parts, a less porous part deposited in the first few minutes that exhibits field-driven electron transport and a more porous outer part where electron transport is by diffusion. The results are supported by frequency-dependent capacitance measurements, which also show that the material is suitable for supercapacitors.

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