Investigation of Eco-friendly Perovskite Solar Cell Employing Niobium Pentoxide as Electron Transport Material using SCAPS-1D

Perovskite is the most appropriate material for designing of thin film solar cells. In this work, inorganic perovskite solar cell which is lead free, stable and eco-friendly has been proposed with configuration FTO/Nb₂O₅/CsSn_0.5Ge_0.5I₃/Spiro-OMeTAD/Au. For high carrier mobility, Nb₂O₅ is used as ETL layer in place of PCBM which also diminishes the cost of device. Proposed solar cell is investigated against limiting factors such as working point temperature, defect density, donor carrier concentration and thickness of perovskite absorber layer. The optimized performance of the proposed structure using Nb₂O₅ as ETL layer are as follows: PCE = 28.25%, V_oc = 1.2789 V, J_sc = 26.3470 mA/cm² and FF = 83.85%. SCAPS-1D is employed for the simulation of proposed perovskite solar device. The proposed perovskite solar cell has the potential to revoke instability and toxicity issues which are the major concerns of present day’s solar cells.