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Charge Recombination Kinetics in Dye-Sensitized Nanocrystalline Titanium Dioxide Films under Externally Applied Bias
Abstract
The kinetics of charge recombination were determined following low intensity optical excitation of Ru II (2,2‘-bipyridyl-4,4‘dicarboxylate) 2 (NCS) 2 sensitized nanocrystalline TiO 2 films as a function of externally applied bias voltage V . These kinetics were found to be multiexponential. The median time ( t 50% ) for charge recombination was found to depend strongly upon bias voltage, reducing from t 50% ∼ 200 ms for V = 0 V versus Ag/AgCl to < 30 ns for V ≤ −500 mV. This reduction in t 50% was found to follow the equation t 50% ∝ exp( qV /1.7 k B T ). These results are consistent with the charge recombination kinetics being strongly dependent upon the accumulation of electrons in intraband/conduction band states of the TiO 2 film. For biases V ≤ −400 mV, the rate of charge recombination was found to exceed the rate of rereduction of the dye cation by an I - /I 3 - redox couple in solution.
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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
Advances in Liquid‐Electrolyte and Solid‐State Dye‐Sensitized Solar Cells
Snaith, H. J., & Schmidt‐Mende, L. (2007) · Advanced Materials · doi:10.1002/adma.200602903 · Cited by 616
Kuciauskas, D., Freund, M. S., Gray, H. B., Winkler, J. R., & Lewis, N. S. (2001) · The Journal of Physical Chemistry B · doi:10.1021/jp002545l · Cited by 286
Metadata
- Authors
- Haque, S. A., Tachibana, Y., Klug, D. R., & Durrant, J. R.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 1998-02-18
- Volume
- 102
- Issue
- 10
- Pages
- 1745-1749
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W1994213559
- Cited by
- 340
- References
- 1
- FWCI
- 25.32
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Charge Recombination Kinetics in Dye-Sensitized Nanocrystalline Titanium Dioxide Films under Externally Applied Bias. https://app.cochat.ai/papers/10.1021/jp973335k
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- Haque, S. A., Tachibana, Y., Klug, D. R., & Durrant, J. R. (1998). Charge Recombination Kinetics in Dye-Sensitized Nanocrystalline Titanium Dioxide Films under Externally Applied Bias. The Journal of Physical Chemistry B. https://doi.org/10.1021/jp973335k
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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
