Abstract:
Double absorber solar cells have drawn interest in recent years in photovoltaic research because of their potential to boost solar energy conversion efficiency. Perovskite absorbers used in double absorber solar cells are an intriguing technique that may assist in improving solar cell efficiency and loweringthe cost, making them an attractive alternative for broad usage in renewable energy applications.However, perovskite absorbers have recently emerged as a potential candidate for double absorber solar cell due to their improved efficiency, lightweight design, low cost, and a wider range of light absorption compared to conventional solar cell materials.This research used a solar cell capacitance simulator (SCAPS) to examine a double absorber solar device that employed NaZn0.7Cu0.3Br3, an inorganic perovskite as the top active layer, and MASnI3 as the bottom active layer. The primary objective is to search for a device structure with enhanced efficiency. In this study, the effectiveness of the proposed solar cell is investigated with a particular focus placed on the impact of absorber layer thicknesses, various electron transport layers (ETL), various hole transport layers (HTL), temperatures, absorber defect density, and diverse metal work functions to reach this aim.After analyzing various solar cell configurations, it is seen that ITO/TiO2/ NaZn0.7Cu0.3Br3 / MASnI3 / CuO /Au has the highest Power Conversion Efficiency (PCE) of 32.58 %, the highest Fill Factor of 82.19 %, the short circuit current density of 34.8389 mA/cm2, and the open circuit voltage of 1.1375 volts. Device simulations showed an optimal MASnI3 absorber thickness of about 1 µm. Finally, simulations show that device efficiency steadily decreases with increasing absorbers defect density and cell operating temperature, and device topologies are stable at 300 K. Eventually, any conductive material is acceptable for use as an anode provided that its work function is higher than or equal to 5.10 eV.
