The utilization of IZO transparent conductive oxide for tandem and substrate type perovskite solar cells

In this article, we apply indium zinc oxide (IZO) transparent conductive oxide film for the fabrication of bifacial-illuminated perovskite solar cells (PSCs) and two substrate type PSCs based on non-fluorine-doped tin oxide (FTO) and ultrathin substrates. The Si/perovskite tandem solar cell system employing bifacial-illuminated PSCs delivers a decent power conversion efficiency (PCE) of 19.51% with 1 cm2 active area. The investigation of PSCs without FTO substrate is further demonstrated using sputtered Ti metal as a substrate. The devices employing a Ti cathode coating on a slide and ultrathin glass could deliver 13.5% and 13.6% of PCE, respectively, revealing a promising application for cost-effective and light-weight non-FTO devices.