Etude par simulation numérique d’une cellule solaire tandem Pérovskite/Silicium.

Abstract

Solar cells have become a prominent solution for harnessing renewable energy, offering a clean and sustainable alternative to traditional power generation methods. Among various photovoltaic technologies, perovskite solar cells (PSCs) have gained significant attention due to their exceptional optoelectronic properties and rapid advancements in power conversion efficiency (PCE). Silicon is a most widely used photovoltaic material with high efficiency and stability, while perovskites offer high absorption coefficients, tunable bandgaps, and ease of fabrication. This combination allows for efficient harvesting of a broader range of the solar spectrum, resulting in enhanced overall performance. In this thesis, Perovskite/Silicon tandem solar cell has been modelled based on methylammonium mixed bromide-iodide lead perovskite using Silvaco Atlas simulator. Our work started by optimizing the single perovskite solar cell structure TiO2/CH3NH3PbI3−xBrx/Spiro-OMeTAD, where the optimization were in particular on the different layer thicknesses of the cell and also on the carrier lifetime. The obtained results showed an enhancement in power conversion efficiency PCE of 24.72%. Secondly, we combine the perovskite top sub-cell with the SHJ bottom subcell to obtain more high efficiency of the tandem design. The results show PCE of 27.02% under mismatched current densities between top, bottom, and tandem cells. Finally, by achieving the current matching between the three cells, 𝐽𝑆𝐶 𝑡𝑜𝑝≃ 𝐽𝑆𝐶 𝑏𝑜𝑡𝑡𝑜𝑚 ≃ 𝐽𝑆𝐶 𝑡𝑎𝑛𝑑𝑒𝑚 ≃18.80mA/cm2, we enhanced the power conversion efficiency to 31.67%.