Methylammonium lead triiodide perovskite-based solar cells efficiency: Insight from experimental and simulation

This work deals with the growth investigation of the methylammonium lead triiodide (MAPbI₃) thin films prepared by the spin coating technique. Firstly, MAPbI₃ films were studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM) and UV-Visible spectroscopy as well as photoluminescence techniques are used to calculate the band gap energy. Indeed, the high-quality MAPbI₃ perovskite films were obtained by using Chlorobenzene as an antisolvent with good crystallinity, large grain sizes, and higher absorption compared to MAPbI₃ treated by toluene. Secondly, the performance of FTO/TiO₂/MAPbI₃/Spiro OMeTAD/Au perovskite solar cell was evaluated using a numerical simulation of the Solar Cell by SCAPS simulator. The effect of the structural and physical parameters of MAPbI₃ absorber layer and HTL with the different antisolvents, including thickness, defect density, total charge density, donor density and electron affinity. Obtained results are: Jsc of 25.96 mA/cm², PCE of 30.70%, Voc of 1.259 V, FF of 88.93% of MAPbI₃-based solar cells when MAPbI₃ is treated by toluene. However, for MAPbI₃- Chlorobenzene, the I-V characteristics are rather: Jsc of 28.18 mA/cm², PCE of 31.81%, FF of 88.19% and Voc of 1.200 V. It is pointed out that the use of chlorobenzene may be of interest to improve the perovskites solar cells performances.