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Dynamics of Electron Injection in Nanocrystalline Titanium Dioxide Films Sensitized with [Ru(4,4‘-dicarboxy-2,2‘-bipyridine)2(NCS)2] by Infrared Transient Absorption
Abstract
We have used femtosecond pump−probe spectroscopy to time resolve the injection of electrons into nanocrystalline TiO 2 film electrodes under ambient conditions following photoexcitation of the adsorbed dye, [Ru(4,4‘-dicarboxy-2,2‘-bipyridine) 2 (NCS) 2 ] (N3). Pumping at one of the metal-to-ligand charge-transfer absorption peaks and probing the absorption by injected electrons in the TiO 2 at 1.52 μm and in the range of 4.1−7.0 μm, we have directly observed the arrival of electrons injected into the TiO 2 film. Our measurements indicate an instrument-limited ∼50 fs upper limit on the electron injection time. We have compared the infrared transient absorption for noninjecting systems consisting of N3 in ethanol and N3 adsorbed to films of nanocrystalline Al 2 O 3 and ZrO 2 and found no indication of electron injection at probe wavelengths in the mid-IR (4.1−7.0 μm).
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Citations
Cited by
Chemistry and Properties of Nanocrystals of Different Shapes
Burda, C., Chen, X., Narayanan, R., & El-Sayed, M. A. (2005) · Chemical Reviews · doi:10.1021/cr030063a · Cited by 7,230
Kongkanand, A., Tvrdy, K., Takechi, K., Kuno, M., & Kamat, P. V. (2008) · Journal of the American Chemical Society · doi:10.1021/ja0782706 · Cited by 1,644
van de Lagemaat, J., Park, N.-G., & Frank, A. J. (2000) · The Journal of Physical Chemistry B · doi:10.1021/jp993172v · Cited by 788
Parameters Influencing the Efficiency of Electron Injection in Dye-Sensitized Solar Cells
Koops, S. E., O’Regan, B. C., Barnes, P. R. F., & Durrant, J. R. (2009) · Journal of the American Chemical Society · doi:10.1021/ja8091278 · Cited by 601
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
- Ellingson, R. J., Asbury, J. B., Ferrere, S., Ghosh, H. N., Sprague, J. R., Lian, T., & Nozik, A. J.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 1998-08-01
- Volume
- 102
- Issue
- 34
- Pages
- 6455-6458
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2167558596
- Cited by
- 294
- References
- 0
- FWCI
- 39.85
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Dynamics of Electron Injection in Nanocrystalline Titanium Dioxide Films Sensitized with [Ru(4,4‘-dicarboxy-2,2‘-bipyridine)2(NCS)2] by Infrared Transient Absorption. https://app.cochat.ai/papers/10.1021/jp982310y
- The paper
- Ellingson, R. J., Asbury, J. B., Ferrere, S., Ghosh, H. N., Sprague, J. R., Lian, T., & Nozik, A. J. (1998). Dynamics of Electron Injection in Nanocrystalline Titanium Dioxide Films Sensitized with [Ru(4,4‘-dicarboxy-2,2‘-bipyridine)2(NCS)2] by Infrared Transient Absorption. The Journal of Physical Chemistry B. https://doi.org/10.1021/jp982310y
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