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Implications of the Negative Capacitance Observed at Forward Bias in Nanocomposite and Polycrystalline Solar Cells
Abstract
Four different types of solar cells prepared in different laboratories have been characterized by impedance spectroscopy (IS): thin-film CdS/CdTe devices, an extremely thin absorber (eta) solar cell made with microporous TiO2/In(OH)xSy/PbS/PEDOT, an eta-solar cell of nanowire ZnO/CdSe/CuSCN, and a solid-state dye-sensitized solar cell (DSSC) with Spiro-OMeTAD as the transparent hole conductor. A negative capacitance behavior has been observed in all of them at high forward bias, independent of material type (organic and inorganic), configuration, and geometry of the cells studied. The experiments suggest a universality of the underlying phenomenon giving rise to this effect in a broad range of solar cell devices. An equivalent circuit model is suggested to explain the impedance and capacitance spectra, with an inductive recombination pathway that is activated at forward bias. The deleterious effect of negative capacitance on the device performance is discussed, by comparison of the results obtained for a conventional monocrystalline Si solar cell showing the positive chemical capacitance expected in the ideal IS model of a solar cell.
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Citations
Cited by
Characterization of nanostructured hybrid and organic solar cells by impedance spectroscopy
Fabregat-Santiago, F., Garcia-Belmonte, G., Mora-Seró, I., & Bisquert, J. (2011) · Physical Chemistry Chemical Physics · doi:10.1039/c0cp02249g · Cited by 1,206
Self-citationElectron Lifetime in Dye-Sensitized Solar Cells: Theory and Interpretation of Measurements
Bisquert, J., Fabregat-Santiago, F., Mora-Seró, I., Garcia-Belmonte, G., & Giménez, S. (2009) · The Journal of Physical Chemistry C · doi:10.1021/jp9037649 · Cited by 771
Self-citationSolid-state memcapacitive system with negative and diverging capacitance
Martinez-Rincon, J., Di Ventra, M., & Pershin, Y. V. (2010) · Physical Review B · doi:10.1103/physrevb.81.195430 · Cited by 99
Metadata
- Authors
- Mora-Seró, I., Bisquert, J., Fabregat-Santiago, F., Garcia-Belmonte, G., Zoppi, G., Durose, K., Proskuryakov, Y., Oja, I., Belaidi, A., Dittrich, T., Tena-Zaera, R., Katty, A., Lévy-Clément, C., Barrioz, V., & Irvine, S. J. C.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2006-02-23
- Volume
- 6
- Issue
- 4
- Pages
- 640-650
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2094162080
- Cited by
- 250
- References
- 0
- FWCI
- 8.43
- Type
- journal article
- Language
- en
- Open access
- closed
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- Mora-Seró, I., Bisquert, J., Fabregat-Santiago, F., Garcia-Belmonte, G., Zoppi, G., Durose, K., Proskuryakov, Y., Oja, I., Belaidi, A., Dittrich, T., Tena-Zaera, R., Katty, A., Lévy-Clément, C., Barrioz, V., & Irvine, S. J. C. (2006). Implications of the Negative Capacitance Observed at Forward Bias in Nanocomposite and Polycrystalline Solar Cells. Nano Letters. https://doi.org/10.1021/nl052295q
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