Research on PbTiO3 nanoparticles optimized mesoporous layer for perovskite solar cells

Organic-inorganic hybrid perovskite solar cells have garnered significant attention due to their facile fabrication process and high photovoltaic conversion efficiency. The electron transport layer plays a crucial role in the carrier separation mechanism of perovskite solar cells, making it a focal point for enhancing cell performance. In this study, PbTiO3 was introduced into TiO2 mesoporous layers by modification and doping in order to optimize cell performance. Initially, the use of PbTiO3-modified mesoporous layers revealed issues such as non-uniform modification layers, low film coverage rates, and reduced light transmittance. These issues hindered the ability of PbTiO3 to facilitate carrier separation and resulting in suboptimal optimization effects. However, by utilizing PbTiO3-doped mesoporous layers for optimizing cell performance, we observed improved quality and higher light transmittance in the perovskite films. As a consequence of the improved carrier separation achieved by PbTiO3, the efficiency of the solar cell has been enhanced to 5.51%.