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Preparation of Nb2O5 Coated TiO2 Nanoporous Electrodes and Their Application in Dye-Sensitized Solar Cells
Abstract
The preparation of a new bilayer nanoporous wide band gap semiconductor electrode and its application for solar cells are reported. This new electrode consists of an inner nanoporous TiO 2 matrix covered with a thin layer of ca. 2−3 nm Nb 2 O 5 . The results presented in this study show that this Nb 2 O 5 layer forms an inherent energy barrier at the electrode−electrolyte interface. This barrier reduces the recombination rate of the photoinjected electrons with their counter holes. A comparison of two similar dye-sensitized solar cells (DSSCs) that differ only in their nanoporous electrodes shows that the solar cells made from the new electrode are superior to the standard cells with respect to all parameters. This superiority measured with many cells results in a 35% increase of the overall conversion efficiency from 3.6 to 5.0%. Optimization of the coating process and the characterization of the coating effects are described.
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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
Anomalous Optical Absorption Limit in InSb
Burstein, E. (1954) · Physical Review · doi:10.1103/physrev.93.632 · Cited by 3,983
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Zhang, Q., & Cao, G. (2011) · Nano Today · doi:10.1016/j.nantod.2010.12.007 · Cited by 631
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Niitsoo, O., Sarkar, S. K., Pejoux, C., Rühle, S., Cahen, D., & Hodes, G. (2006) · Journal of Photochemistry and Photobiology A: Chemistry · doi:10.1016/j.jphotochem.2005.12.012 · Cited by 379
Metadata
- Authors
- Chen, S. G., Chappel, S., Diamant, Y., & Zaban, A.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2001-11-27
- Volume
- 13
- Issue
- 12
- Pages
- 4629-4634
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W1971329364
- Cited by
- 331
- References
- 2
- FWCI
- 7.36
- Type
- journal article
- Language
- en
- Open access
- closed
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- Chen, S. G., Chappel, S., Diamant, Y., & Zaban, A. (2001). Preparation of Nb2O5 Coated TiO2 Nanoporous Electrodes and Their Application in Dye-Sensitized Solar Cells. Chemistry of Materials. https://doi.org/10.1021/cm010343b
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