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Rühle S, Greenshtein M, Chen SG, et al. Molecular adjustment of the electronic properties of nanoporous electrodes in dye-sensitized solar cells. J Phys Chem B. 2005;109(40):18907-13doi: 10.1021/jp0514123.
Rühle, S., Greenshtein, M., Chen, S. G., Merson, A., Pizem, H., Sukenik, C. S., Cahen, D., & Zaban, A. (2005). Molecular adjustment of the electronic properties of nanoporous electrodes in dye-sensitized solar cells. The journal of physical chemistry. B, 109(40), 18907-13. https://doi.org/10.1021/jp0514123
Rühle, Sven, et al. "Molecular adjustment of the electronic properties of nanoporous electrodes in dye-sensitized solar cells." The journal of physical chemistry. B vol. 109,40 (2005): 18907-13. doi: https://doi.org/10.1021/jp0514123
Rühle S, Greenshtein M, Chen SG, Merson A, Pizem H, Sukenik CS, Cahen D, Zaban A. Molecular adjustment of the electronic properties of nanoporous electrodes in dye-sensitized solar cells. J Phys Chem B. 2005 Oct 13;109(40):18907-13. doi: 10.1021/jp0514123. PMID: 16853434.
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J Phys Chem B. 2005 Oct 13;109(40):18907-13. doi: 10.1021/jp0514123.

Molecular adjustment of the electronic properties of nanoporous electrodes in dye-sensitized solar cells.

The journal of physical chemistry. B

Sven Rühle, Miri Greenshtein, S-G Chen, Alexandra Merson, Hillel Pizem, Chaim S Sukenik, David Cahen, Arie Zaban

Affiliations

  1. Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel.

PMID: 16853434 DOI: 10.1021/jp0514123

Abstract

Molecular modification of dye-sensitized, mesoporous TiO2 electrodes changes their electronic properties. We show that the open-circuit voltage (V(oc)) of dye-sensitized solar cells varies linearly with the dipole moment of coadsorbed phosphonic, benzoic, and dicarboxylic acid derivatives. A similar dependence is observed for the short-circuit current density (I(sc)). Photovoltage spectroscopy measurements show a shift of the signal onset as a function of dipole moment. We explain the dipole dependence of the V(oc) in terms of a TiO2 conduction band shift with respect to the redox potential of the electrolyte, which is partially followed by the energy level of the dye. The I(sc) shift is explained by a dipole-dependent driving force for the electron current and a dipole-dependent recombination current.

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