Electrochemical Deposition of Compact TiO2 Layer for Perovskite Solar Cells

Abstract

This presentation is dedicated to the utilization of a compact TiO2 layer in n-i-p perovskite solar cells as blocking and electron transporting layer. The formation of a homogeneous compact TiO2 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 TiO2 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 TiO2 layer. The electrodeposited TiO2 films were characterized by a variety of methods, including UV-VIS spectroscopy, cyclic voltammetry, X-ray diffraction, and scanning electron microscopy. The electrodeposited TiO2 compact layer was introduced in perovskite solar cells, which were compared with cells prepared with sprayed TiO2 compact layers. The results confirmed that an electrochemically deposited compact TiO2 layer can work sufficiently as a blocking and electron transport layer in perovskite solar cells.