The DOI matches its Crossref record; 16 of the 16 references it cites were found in a registry or an index.
Ambipolar Diffusion of Photocarriers in Electrolyte-Filled, Nanoporous TiO2
Abstract
We report transient photocurrent measurements on solar cell structures based on dye-sensitized, porous TiO 2 films filled with a liquid electrolyte. The measurements are interpreted as ambipolar diffusion; under most measurement conditions, the ambipolar diffusion coefficient is dominated by electrons diffusing in the TiO 2 matrix. We report a strong dependence of the ambipolar diffusion coefficient upon the photoexcitation density, as has been proposed previously. The coefficients vary from 10 -8 cm 2 s -1 at low density to 10 -4 cm 2 s -1 for densities of 10 18 cm -3 . At a specified photoexcitation density, ambipolar diffusion coefficients measured using weak laser pulses and optical bias are about 10 times larger than coefficients measured using large-intensity laser pulses. We describe trapping models for these effects based on an exponential distribution ( T 0 = 650 K) of electron trap levels in TiO 2 . We infer an electron recombination cross section less than 2 × 10 -27 cm 2; this value is nearly 10 orders of magnitude smaller than typical values in compact semiconductors and indicates the extraordinarily effective separation of electrons in the TiO 2 matrix from electrolyte ions only nanometers distant.
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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
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Self-citationAn Iodine/Triiodide Reduction Electrocatalyst for Aqueous and Organic Media
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Continuous-time random-walk model of electron transport in nanocrystallineTiO2electrodes
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High mobility n-type charge carriers in large single crystals of anatase (TiO2)
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Evaluation of the Charge-Collection Efficiency of Dye-Sensitized Nanocrystalline TiO2 Solar Cells
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Gao, F., Wang, Y., Shi, D., Zhang, J., Wang, M., Jing, X., Humphry-Baker, R., Wang, P., Zakeeruddin, S. M., & Grätzel, M. (2008) · Journal of the American Chemical Society · doi:10.1021/ja801942j · Cited by 1,368
Comparison of Dye-Sensitized Rutile- and Anatase-Based TiO2Solar Cells
Park, N.-G., van de Lagemaat, J., & Frank, A. J. (2000) · The Journal of Physical Chemistry B · doi:10.1021/jp994365l · Cited by 1,121
Self-citationMolecular Semiconductors in Organic Photovoltaic Cells
Hains, A. W., Liang, Z., Woodhouse, M. A., & Gregg, B. A. (2010) · Chemical Reviews · doi:10.1021/cr9002984 · Cited by 935
Zhu, K., Vinzant, T. B., Neale, N. R., & Frank, A. J. (2007) · Nano Letters · doi:10.1021/nl072145a · Cited by 461
Self-citationNeale, N. R., Kopidakis, N., van de Lagemaat, J., Grätzel, M., & Frank, A. J. (2005) · The Journal of Physical Chemistry B · doi:10.1021/jp0538666 · Cited by 310
Self-citationDye-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
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
Progress on the electrolytes for dye-sensitized solar cells
Wu, J., Lan, Z., Hao, S., Li, P., Lin, J., Huang, M., Fang, L., & Huang, Y. (2008) · Pure and Applied Chemistry · doi:10.1351/pac200880112241 · Cited by 286
Metadata
- Authors
- Kopidakis, N., Schiff, E. A., Park, N.-G., van de Lagemaat, J., & Frank, A. J.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2000-03-18
- Volume
- 104
- Issue
- 16
- Pages
- 3930-3936
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2007452336
- Cited by
- 340
- References
- 16
- FWCI
- 15.87
- Type
- journal article
- Language
- en
- Open access
- closed
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