Facile Interfacial Engineering of Mesoporous TiO for Low-Temperature Processed Perovskite Solar Cells.

The mesoporous TiO nanoparticle-based scaffold structure is the best electron transport layer (ETL) for perovskite solar cells (PSCs) and is still used in most PSCs with optimal photovoltaic characteristics. However, the high sintering temperature of TiO nanoparticles required to remove binders from the TiO paste limits PSC application to flexible electronics. In this study, a simple interface modification process involving ethanol rinsing is developed to enhance the photovoltaic characteristics of low-temperature processed PSCs.