One-pot easily-processed TiO2 macroporous photoanodes (Ti-HIPE) for dye-sensitized solar cells

Céline M. Leroy (1) , Céline Olivier (2) , Thierry Toupance (2) , Mamatimin Abbas (3) , Lionel Hirsch (3) , Serge Ravaine (1) , Rénal Backov (1)

1 CRPP - Centre de recherches Paul Pascal
2 ISM - Institut des Sciences Moléculaires
3 IMS - Laboratoire de l'intégration, du matériau au système

Macroporous TiO2 photoanodes for Dye-sensitized Solar Cells (DSCs) were synthesized by new one-pot method combining solegel chemistry, emulsion templating and doctor-blade 2D deposition technique. Multi-step deposition followed by annealing at 500 C yielded up to 30-mm thick anatase TiO2 films exhibiting a complex porous structure including micro-, meso- and macropores. After sensitization with a commercial ruthenium dye, the photovoltaic performance of the films in DSCs was related to their structural properties, and their efficiency was compared to those of P25 reference photoanodes. The easily-processed macroporous photoanodes showed encouraging performance, almost reaching 4%, with enhanced light scattering at high wavelengths and improved light-harvesting properties.

Mots clés: Sol-gel; Titania; Photovoltaic; Porous matter; Morphosynthesis

Domaines: Matériaux

Céline M. Leroy, Céline Olivier, Thierry Toupance, Mamatimin Abbas, Lionel Hirsch, et al.. One-pot easily-processed TiO2 macroporous photoanodes (Ti-HIPE) for dye-sensitized solar cells. Solid State Sciences, 2014, 28, pp. 81-89. ⟨10.1016/j.solidstatesciences.2013.12.004⟩. ⟨hal-00926850⟩