Advances in Monolithic Perovskite CIGS Tandem Solar Cells: A Path to High-Efficiency Photovoltaics

Abstract

Abstract: Monolithic perovskite/CIGS tandem solar cells represent a transformative approach to achieving high-efficiency photovoltaics with reduced environmental impact. This review focuses on recent advancements in perovskite/CIGS tandem architectures, highlighting their unique advantages, such as flexibility, lightweight design, and radiation hardness, which make them suitable for diverse applications, including space exploration and portable electronics. The integration of perovskite materials with copper indium gallium selenide (CIGS) offers a promising pathway to surpass the efficiency limits of singlejunction cells by leveraging complementary bandgap tuning for enhanced spectral utilization. Recent progress includes improvements in interface engineering, absorber layer optimization, and transparent conductive electrodes, resulting in power conversion efficiencies exceeding 24%. Despite these advancements, challenges such as parasitic absorption, interfacial recombination, and scaling for large-area devices remain significant hurdles. This paper consolidates theoretical insights and experimental findings to provide a comprehensive analysis of the critical factors influencing the performance of perovskite/CIGS tandem solar cells. By addressing these challenges, this technology has the potential to redefine sustainable and efficient solar energy solutions for the future