[en] Well-compacted and crack-free TiO2 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 TiO2 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 4.52×10−10 mol·mm−2 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.
Disciplines :
Chemistry
Author, co-author :
González, Zoilo; Instituto de Cerámica y Vidrio, CSIC, Madrid
Yus, Joaquin; Instituto de Cerámica y Vidrio, CSIC, Madrid
Sanchez-Herencia, Antonio Javier; Instituto de Cerámica y Vidrio, CSIC, Madrid
Dewalque, Jennifer ; Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Manceriu, Laura ; Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Henrist, Catherine ; Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Ferrari, Begoña; Instituto de Cerámica y Vidrio, CSIC, Madrid
Language :
English
Title :
A colloidal approach to prepare binder and crack-free TiO2 multilayer coatings from particulate suspensions: application in DSSCs
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