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Photoinduced Charge Carrier Dynamics of Zn−Porphyrin−TiO2 Electrodes: The Key Role of Charge Recombination for Solar Cell Performance
Abstract
Time resolved absorption spectroscopy has been used to study photoinduced electron injection and charge recombination in Zn-porphyrin sensitized nanostructured TiO(2) electrodes. The electron transfer dynamics is correlated to the performance of dye sensitized solar cells based on the same electrodes. We find that the dye/semiconductor binding can be described with a heterogeneous geometry where the Zn-porphyrin molecules are attached to the TiO(2) surface with a distribution of tilt angles. The binding angle determines the porphyrin-semiconductor electron transfer distance and charge transfer occurs through space, rather than through the bridge connecting the porphyrin to the surface. For short sensitization times (1 h), there is a direct correlation between solar cell efficiency and amplitude of the kinetic component due to long-lived conduction band electrons, once variations in light harvesting (surface coverage) have been taken into account. Long sensitization time (12 h) results in decreased solar cell efficiency because of decreased efficiency of electron injection.
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Citations
Cites
Large π-Aromatic Molecules as Potential Sensitizers for Highly Efficient Dye-Sensitized Solar Cells
Imahori, H., Umeyama, T., & Ito, S. (2009) · Accounts of Chemical Research · doi:10.1021/ar900034t · Cited by 1,012
Self-citationInjection limitations in a series of porphyrin dye-sensitized solar cells
Santos, T. D., Morandeira, A., Koops, S., Mozer, A. J., Tsekouras, G., Dong, Y., Wagner, P., Wallace, G., Earles, J. C., Gordon, K. C., et al. (2010) · The Journal of Physical Chemistry C · doi:10.1021/jp908401k · Cited by 104
Cited by
Porphyrins as excellent dyes for dye-sensitized solar cells: recent developments and insights
Higashino, T., & Imahori, H. (2015) · Dalton Transactions · doi:10.1039/c4dt02756f · Cited by 582
Self-citationDye-sensitized solar cells strike back
Muñoz-García, A. B., Benesperi, I., Boschloo, G., Concepcion, J. J., Delcamp, J. H., Gibson, E. A., Meyer, G. J., Pavone, M., Pettersson, H., Hagfeldt, A., et al. (2021) · Chemical Society Reviews · doi:10.1039/d0cs01336f · Cited by 544
Metadata
- Authors
- Imahori, H., Kang, S., Hayashi, H., Haruta, M., Kurata, H., Isoda, S., Canton, S. E., Infahsaeng, Y., Kathiravan, A., Pascher, T., Chábera, P., Yartsev, A. P., & Sundström, V.
- Venue
- The Journal of Physical Chemistry A
- Publisher
- American Chemical Society (ACS)
- Published
- 2010-10-20
- Volume
- 115
- Issue
- 16
- Pages
- 3679-3690
- ISSN
- 1089-5639 (ISSN-L)
- 1520-5215
- OpenAlex
- W1993422284
- Cited by
- 225
- References
- 2
- FWCI
- 9.64
- Type
- journal article
- Language
- en
- Open access
- closed
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