In-situ investigation of adsorption of dye and coadsorbates on TiO2 films using QCM-D, fluorescence and AFM techniques

Hauke A. Harms; Nicolas Tétreault; Kislon Voitchovsky; Francesco Stellacci; Michael Grätzel

doi:10.1117/12.2024194

11 September 2013 In-situ investigation of adsorption of dye and coadsorbates on TiO₂ films using QCM-D, fluorescence and AFM techniques

Hauke A. Harms, Nicolas Tétreault, Kislon Voitchovsky, Francesco Stellacci, Michael Grätzel

Author Affiliations +

Proceedings Volume 8811, Physical Chemistry of Interfaces and Nanomaterials XII; 88110C (2013) https://doi.org/10.1117/12.2024194
Event: SPIE NanoScience + Engineering, 2013, San Diego, California, United States

Abstract

Simultaneous adsorption of dye molecules and coadsorbates is important for the fabrication of high-efficiency dyesensitized solar cells, but its mechanism is not well understood. Herein, we use a quartz crystal microbalance with dissipation technique (QCM-D) to study dynamically and quantitatively the sensitization of TiO₂ in situ. We investigate dye loading for a ruthenium(II) polypyridyl complex (Z907), of a triphenylamine-based D-π-A dye (Y123), and of a ullazine sensitizer (JD21), as well as the simultaneous adsorption of the latter two with the coadsorbate chenodeoxycholic acid. By combining the QCM-D technique with fluorescence measurements, we quantify molar ratios between the dye and coadsorbate. Furthermore, we will present first studies using liquid-phase AFM on the adsorbed dye monolayer, thus obtaining complementary microscopic information that may lead to understanding of the adsorption mechanism on the molecular scale.

Citation Download Citation

Hauke A. Harms, Nicolas Tétreault, Kislon Voitchovsky, Francesco Stellacci, and Michael Grätzel "In-situ investigation of adsorption of dye and coadsorbates on TiO₂ films using QCM-D, fluorescence and AFM techniques", Proc. SPIE 8811, Physical Chemistry of Interfaces and Nanomaterials XII, 88110C (11 September 2013); https://doi.org/10.1117/12.2024194

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