Nanoporous anodic alumina with ohmic contact between substrate and infill: Application to perovskite solar cells

María P Montero‐rama (1) , Aurelien Viterisi (2) , Josep Ferré‐borrull (1) , Lluis F Marsal (1)

1 Universitat Rovira i Virgili
2 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux

The use of a nanostructured aluminum substrate as the cathode for a perovskite photovoltaic device is described. This cathode consists of an aluminum substrate onto which a highly ordered array of aluminum oxide tubular pores was grown viaanodization. The 1- μm thick pores – arranged in a closed- packed hexagonal pattern – were subsequently selectively etched at the bottom to remove the so- called aluminum oxide barrier layer. The subsequent infiltration of the pores with the components of a methylammonium lead iodide perovskite solar cells, and the completion with a semi- transparent anode, have shown to allow the es-tablishment of an ohmic contact between the substrate itself and the compo-nents infiltrated into the Al2O3pores. Indeed, a clear rectifying behavior was observed on the full devices, as well as modest photovoltaic conversion efficien-cies. This paper demonstrates that an ohmic contact can be established between the aluminum substrate from which nanoporous anodic alumina was grown, and that the pores can be used to compartmentalize the infill material down to the nanoscopic level

Mots clés: methylammonium- lead iodide; nanoporous anodic alumina; perovskite solar cells; photovoltaics

Domaines: Matériaux; Polymères; Chimie théorique et/ou physique; Chimie analytique

María P Montero‐rama, Aurelien Viterisi, Josep Ferré‐borrull, Lluis F Marsal. Nanoporous anodic alumina with ohmic contact between substrate and infill: Application to perovskite solar cells. Energy Science & Engineering, 2021, 10, pp.30 - 42. ⟨10.1002/ese3.1002⟩. ⟨hal-03515679⟩