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Combined Experimental and DFT-TDDFT Computational Study of Photoelectrochemical Cell Ruthenium Sensitizers

Open access
Nazeeruddin, Mohammad K., De Angelis, Filippo, Fantacci, Simona, Selloni, Annabella, Viscardi, Guido, Liska, Paul, Ito, Seigo, Takeru, Bessho, Grätzel, Michael·2005·Journal of the American Chemical Society

Abstract

We report a combined experimental and computational study of several ruthenium(II) sensitizers originated from the [Ru(dcbpyH(2))(2)(NCS)(2)], N3, and [Ru(dcbpyH(2))(tdbpy)(NCS)(2)], N621, (dcbpyH(2) = 4,4'-dicarboxy-2,2'-bipyridine, tdbpy = 4,4'-tridecyl-2,2'-bipyridine) complexes. A purification procedure was developed to obtain pure N-bonded isomers of both types of sensitizers. The photovoltaic data of the purified N3 and N621 sensitizers adsorbed on TiO(2) films in their monoprotonated and diprotonated state, exhibited remarkable power conversion efficiency at 1 sun, 11.18 and 9.57%, respectively. An extensive Density Functional Theory (DFT)-Time Dependent DFT study of these sensitizers in solution was performed, investigating the effect of protonation of the terminal carboxylic groups and of the counterions on the electronic structure and optical properties of the dyes. The calculated absorption spectra are in good agreement with the experiment, thus allowing a detailed assignment of the UV-vis spectral features of the two types of dyes. The computed alignments of the molecular orbitals of the different complexes with the band edges of a model TiO(2) nanoparticle provide additional insights into the electronic factors governing the efficiency of dye-sensitized solar cell devices.

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Crossref · 10.1021/ja052467l

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Metadata

Authors
Nazeeruddin, M. K., De Angelis, F., Fantacci, S., Selloni, A., Viscardi, G., Liska, P., Ito, S., Takeru, B., & Grätzel, M.
Venue
Journal of the American Chemical Society
Published
2005-11-12
Volume
127
Issue
48
Pages
16835-16847
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W1991980035
Cited by
2,749
References
22
FWCI
53.69
Type
journal article
Language
en
Open access
green

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