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Enhanced Charge-Collection Efficiencies and Light Scattering in Dye-Sensitized Solar Cells Using Oriented TiO2 Nanotubes Arrays
Abstract
We report on the microstructure and dynamics of electron transport and recombination in dye-sensitized solar cells (DSSCs) incorporating oriented TiO2 nanotube (NT) arrays. The morphology of the NT arrays, which were prepared from electrochemically anodized Ti foils, were characterized by scanning and transmission electron microscopies. The arrays were found to consist of closely packed NTs, several micrometers in length, with typical wall thicknesses and intertube spacings of 8-10 nm and pore diameters of about 30 nm. The calcined material was fully crystalline with individual NTs consisting of about 30 nm sized crystallites. The transport and recombination properties of the NT and nanoparticle (NP) films used in DSSCs were studied by frequency-resolved modulated photocurrent/photovoltage spectroscopies. While both morphologies display comparable transport times, recombination was much slower in the NT films, indicating that the NT-based DSSCs have significantly higher charge-collection efficiencies than their NP-based counterparts. Dye molecules were shown to cover both the interior and exterior walls of the NTs. Analysis of photocurrent measurements indicates that the light-harvesting efficiencies of NT-based DSSCs were higher than those found for DSSCs incorporating NPs owing to stronger internal light-scattering effects.
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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
Cited by
Liu, B., & Aydil, E. S. (2009) · Journal of the American Chemical Society · doi:10.1021/ja8078972 · Cited by 2,381
Zhang, L., Zhao, Z., & Gong, J. (2017) · Angewandte Chemie International Edition · doi:10.1002/anie.201612214 · Cited by 1,048
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
Energy harvesting and storage in 1D devices
Sun, H., Zhang, Y., Zhang, J., Sun, X., & Peng, H. (2017) · Nature Reviews Materials · doi:10.1038/natrevmats.2017.23 · Cited by 528
Flexible electronics based on inorganic nanowires
Liu, Z., Xu, J., Chen, D., & Shen, G. (2015) · Chemical Society Reviews · doi:10.1039/c4cs00116h · Cited by 512
Metadata
- Authors
- Zhu, K., Neale, N. R., Miedaner, A., & Frank, A. J.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2006-12-02
- Volume
- 7
- Issue
- 1
- Pages
- 69-74
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W1993231556
- Cited by
- 2,033
- References
- 1
- FWCI
- 57.04
- Type
- journal article
- Language
- en
- Open access
- closed
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- Zhu, K., Neale, N. R., Miedaner, A., & Frank, A. J. (2007). Enhanced Charge-Collection Efficiencies and Light Scattering in Dye-Sensitized Solar Cells Using Oriented TiO2 Nanotubes Arrays. Nano Letters. https://doi.org/10.1021/nl062000o
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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