Influence of Sr-doped ultra-thin PbTiO ₃ on the performance of perovskite cells

This study introduced lead titanate as a material for the analysis of perovskite cells. Strontium ions were doped into lead titanate at various concentrations to improve the material's ability to effectively analyze perovskite cell performance. Strontium-doped lead titanate thin films were synthesized using a variety of reagents and equipment, followed by characterization using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy. The carrier transport properties of the perovskite cells were evaluated by electrochemical impedance spectroscopy and monochromatic incident photon-to-electron conversion efficiency measurements. The experimental results demonstrated that the lead titanate material doped with strontium ions possessed more obvious peak changes than that of the lead titanate material without strontium ions doping. Among them, a short-circuit current density of 7.55 mA/cm² and an open-circuit voltage of 1.50 V, as extracted from the J–V curve under standard AM1.5G illumination were obtained. Furthermore, the maximum efficiency of the strontium ion doped lead titanate material reached 56kΩ indicating reduced charge recombination and improved carrier transport when analyzing the carrier transport speed of the battery. Taken together, the strontium ion-doped lead titanate material can effectively enhance the performance of perovskite solar, and can more accurately analyze the specific factors affecting the performance of perovskite cells.