Investigation and influence of layer composition of tandem perovskite solar cells for applications in future renewable and sustainable energy

Future needs a clean source of generated power to meet its ever-increasing demand for electricity. One of the most cost-effective and practically viable sources for clean energy is solar Photovoltaic (PV). By using tandem solar cells, the absorption range of the solar irradiation spectrum is increased which resulted in better efficiency than a single-junction solar cells. So our research work is based on Perovskite-Perovskite solar tandem cells of MA0.8CS0.2Pb(I0.5Br0.5)3 with 1.8 eV and MAPb0.5Sn0.5I3 with 1.2 eV. Large bandgap and small bandgap subcells give the power conversion efficiency (PCE) of 13.98 % and 18.21 % respectively. By accumulating all subcells with suitable interconnecting and recombination layers, we achieved a PCE of 20.9 %. It also unleashes the prospective of all perovskite solar cells in order to achieve its maximum limit of 44.3 %.