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A colloidal approach to prepare binder and crack-free TiO2 multilayer coatings from particulate suspensions: Application in DSSCs

AuthorsGonzález Granados, Zoilo ; Yus, Joaquín; Sánchez Herencia, Antonio Javier; Dewalque, Jennifer; Manceriu, Laura; Henrist, Catherine; Ferrari-Fernández, Begoña
Particulate suspensions
Colloidal processing
Issue Date17-Sep-2018
CitationJournal of the European Ceramic Society 39: 366- 375 (2019)
AbstractA porous well-consolidated and crack-free TiO multilayer coatings have been manufactured from a colloidal approach based on the preparation of particulate suspensions for DSSC. The study of the suspension parameters to optimize dispersion and stabilization of the TiO nanoparticle in the liquid media as well as a thermal stabilization step between the layers have been defined as two key points in the processing method to obtain interconnected microstructures, free of defects and heterogeneities, that prevent the application of an additional scattering layer or any kind of specific or clean conditions during deposition. The sintering process at low temperature, 450⁰C, has allowed obtaining open microarchitectures avoiding the complete densification and favoring the dye adsorption. A thickness of 12.8 μm resulted in a successful dye loading of 4.52 × 10 mol·mm and a photoefficiency of 5.7%, both in the range of the others particulate systems. EIS measurements were also made to study the transfer charge phenomena.
Publisher version (URL)https://doi.org/10.1016/j.jeurceramsoc.20182018.09
Identifiersdoi: 10.1016/j.jeurceramsoc.2018.09.018
issn: 1873-619X
e-issn: 1873-619X
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