Inverse opal photoanodes: preparation and optical properties
Rudi Cloots a, Pierre Colson a, Gilles Spronck a, Jennifer Dewalque a, Catherine Henrist a, Damien Baron b, Jérôme Loicq b
a University of Liege, GREENMAT, Allée du 6 Aout 13, 4000 Liege, Belgium
b University of Liege, CSL, Liege Science Park, Avenue du Pré-Aily, 4031 Angleur, Belgium
nanoGe Perovskite Conferences
Proceedings of Perovskite Thin Film Photovoltaics (ABXPV17)
València, Spain, 2017 March 1st - 2nd
Organizers: Henk Bolink and David Cahen
Poster, Jennifer Dewalque, 013
Publication date: 18th December 2016

Perovskite compounds, used either in mesoscopic or planar solar cells, have allowed preparing highly efficient solid-state devices (>20%).

In this study, we propose to design photoanodes with photonic structure in order to modulate light interaction. The periodic structure of porosity could add specific optical properties likely to increase light harvesting and reduce reflexion losses. Besides, current efficiencies reported for mesoscopic perovskite solar cells using an inorganic porous scaffold are slightly lower than those reported for planar perovskite cells mainly due to issues in perovskite infiltration. The control of the porous network architecture in terms of pore organization, size and connectivity could overcome this limitation.  

TiO2/perovskite and perovskite-only photoanodes with an inverse opal porous structure are prepared from templating techniques, using polystyrene beads as structuring agent. The photoanode microstructure is further characterized by scanning electron microscopy (SEM) and X-Ray diffraction (XRD). In parallel, light interaction is modeled in order to find the best compromise in terms of photonic architecture (pore size, organization, thickness…). 



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