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Electron Transport in Porous Nanocrystalline TiO2 Photoelectrochemical Cells
Abstract
The photocurrent response of dye-sensitized, porous nanocrystalline TiO 2 cells was studied as a function of light intensity, in both the time domain (photocurrent transient measurements) and the frequency domain (intensity-modulated photocurrent spectroscopy). The photocurrent transients are characterized by a fast and a slow component. The rise time of the transients was in the range of milliseconds to seconds and exhibited a power law dependence on light intensity with an exponent of −0.6 to −0.8. The response to a modulated light intensity is characterized by a depressed semicircle in the complex plane. The time constant obtained from these spectra exhibits the same power law dependence on light intensity. The transient response of these cells is dominated by electron transport in the TiO 2 film, and the results are shown to be consistent with a diffusion model where the diffusion coefficient for electrons in the particle network is a function of the light intensity.
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Citations
Cites
A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films
O'Regan, B., & Grätzel, M. (1991) · Nature · doi:10.1038/353737a0 · Cited by 28,599
Cited by
Synthesis and Characterization of Monodisperse Nanocrystals and Close-Packed Nanocrystal Assemblies
Murray, C. B., Kagan, C. R., & Bawendi, M. G. (2000) · Annual Review of Materials Science · doi:10.1146/annurev.matsci.30.1.545 · Cited by 4,353
van de Lagemaat, J., Park, N.-G., & Frank, A. J. (2000) · The Journal of Physical Chemistry B · doi:10.1021/jp993172v · Cited by 788
Counter electrodes in dye-sensitized solar cells
Wu, J., Lan, Z., Lin, J., Huang, M., Huang, Y., Fan, L., Luo, G., Lin, Y., Xie, Y., & Wei, Y. (2017) · Chemical Society Reviews · doi:10.1039/c6cs00752j · Cited by 788
Dye-sensitized TiO2 nanotube solar cells: fabrication and electronic characterization
Ohsaki, Y., Masaki, N., Kitamura, T., Wada, Y., Okamoto, T., Sekino, T., Niihara, K., & Yanagida, S. (2005) · Physical Chemistry Chemical Physics · doi:10.1039/b511016e · Cited by 288
Metadata
- Authors
- Cao, F., Oskam, G., Meyer, G. J., & Searson, P. C.
- Venue
- The Journal of Physical Chemistry
- Publisher
- American Chemical Society (ACS)
- Published
- 1996-01-01
- Volume
- 100
- Issue
- 42
- Pages
- 17021-17027
- ISSN
- 0022-3654 (ISSN-L)
- 1541-5740
- OpenAlex
- W1987952733
- Cited by
- 399
- References
- 1
- FWCI
- 14.20
- Type
- journal article
- Language
- en
- Open access
- closed
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- Cao, F., Oskam, G., Meyer, G. J., & Searson, P. C. (1996). Electron Transport in Porous Nanocrystalline TiO2 Photoelectrochemical Cells. The Journal of Physical Chemistry. https://doi.org/10.1021/jp9616573
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
