A hemisquaraine dye molecule (CT1) was used as TiO2 sensitizer. The influence of the dye-adsorption time on the electrical impedance of a CT1-based dye-sensitized solar cell (DSC) was analyzed. Differently from what we observed with commercial Ru dye-based DSC, a non-monotonic effect of the impregnation time on the impedance has been found and the dye loading time is much reduced, a desirable outcome in economic grounds. This feature is analyzed in terms of the dye molecules tendency to aggregate close to the TiO2/electrolyte interface. A physical model that fits well the experimental data is proposed, which also takes into account a correction related to the difference between the illuminated area of the cell and the total area available in the electrical measurements.

Modeling of the dye loading time influence on the electrical impedance of a dye-sensitized solar cell / Pugliese, Diego; Shahzad, Nadia; Sacco, Adriano; Tresso, Elena Maria; Anca Luiza Alexe, Ionescu. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 114:9(2013). [10.1063/1.4819207]

Modeling of the dye loading time influence on the electrical impedance of a dye-sensitized solar cell

PUGLIESE, DIEGO;SHAHZAD, NADIA;SACCO, ADRIANO;TRESSO, Elena Maria;
2013

Abstract

A hemisquaraine dye molecule (CT1) was used as TiO2 sensitizer. The influence of the dye-adsorption time on the electrical impedance of a CT1-based dye-sensitized solar cell (DSC) was analyzed. Differently from what we observed with commercial Ru dye-based DSC, a non-monotonic effect of the impregnation time on the impedance has been found and the dye loading time is much reduced, a desirable outcome in economic grounds. This feature is analyzed in terms of the dye molecules tendency to aggregate close to the TiO2/electrolyte interface. A physical model that fits well the experimental data is proposed, which also takes into account a correction related to the difference between the illuminated area of the cell and the total area available in the electrical measurements.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2514884
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