Electrochemical Deposition of Compact TiO₂ Layer for Perovskite Solar Cells

Abstract

This presentation is dedicated to the utilization of a compact TiO 2 layer in n-i-p perovskite solar cells as blocking and electron transporting layer. The formation of a homogeneous compact TiO 2 layer is a key step toward blocking the electron back-reaction between conductive substrate (F-doped tin oxide) and perovskite. In the present study, a compact TiO 2 layer was prepared by electrochemical deposition. This method is an alternative to the frequently used alternative of spray pyrolysis commonly used to prepare a compact TiO 2 layer. The electrodeposited TiO 2 films were characterized by a variety of methods, including UV-VIS spectroscopy, cyclic voltammetry, X-ray diffraction, and scanning electron microscopy. The electrodeposited TiO 2 compact layer was introduced in perovskite solar cells, which were compared with cells prepared with sprayed TiO 2 compact layers. The results confirmed that an electrochemically deposited compact TiO 2 layer can work sufficiently as a blocking and electron transport layer in perovskite solar cells.