Efficiency optimization of double perovskite solar cells using Bi₂FeCrO₆ and Cs₂BiAgI₆ without charge transport layers: A SCAPS-1D simulation study
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The development of efficient and environmentally friendly photovoltaic technologies is crucial for addressing global energy challenges. This study investigates the performance of lead-free tandem perovskite solar cells using Bi 2 FeCrO 6 and Cs 2 BiAgI 6 as absorber layers. Through SCAPS-1D simulations, the effects of absorber thickness, defect density, metal work function, and temperature variations on power conversion efficiency (PCE) were analyzed. The optimized tandem configuration demonstrated promising results, with BFCO's multiferroic properties improving charge separation and Cs 2 BiAgI 6 contributing to efficient photon absorption in the lower energy spectrum. Notably, the choice of back metal contact was found to significantly affect the performance, with higher work function metals such as Au minimizing recombination losses. Additionally, temperature-dependent simulations revealed a moderate decline in the efficiency at elevated temperatures, emphasizing the importance of material stability. This study provides critical insights into the viability of lead-free double perovskites for next-generation tandem solar cells and offers a sustainable alternative to traditional lead-based perovskite solar technologies.
