SnO₂/ZnO Heterostructure as an Electron Transport Layer for Perovskite Solar Cells

Abstract

This work reports a study of the room-temperature synthesis of a SnO₂/ZnO bilayer by magnetron sputtering. Morphological, optical, and electrical properties of the bilayer were investigated for different thicknesses of SnO₂. Morphology was studied using profilometry and field emission scanning electron microscopy. The optical transmittances of the ZnO films and of the SnO₂/ZnO combination were high (about 80%) in the visible, and the SnO₂ film did not alter the optical properties of the ZnO, which would act as a transparent contact electrode in a perovskite solar cell.

Keywords:
ETL; Doped tin oxide; Solar energy; PSC