In this study, we present a novel ligand evolution (LE) strategy employing p-toluenesulfonyl hydrazide (PTSH) that regulates film formation and eliminates deep traps in inorganic narrow bandgap perovskite, leading to advancements in 2-terminal inorganic perovskite tandem solar cells (IPTSCs). This method addresses previous fabrication challenges and enhances both the efficiency and stability of the cells.
The 1.31 eV CsPb0.4Sn0.6I3:LE device demonstrates a record efficiency of 17.41%, and when combined with the 1.92 eV CsPbI2Br top-cell, the 2T IPTSCs achieve an impressive champion efficiency of 22.57%, further showcasing the potential of harnessing inorganic cations in tandem solar cell design.
Remarkably, IPTSCs engineered in this study exhibit exceptional durability. When subjected to maximum power point (MPP) tracking, the cells maintain over 80% of their initial efficiency, underscoring their promise for long-term applications in solar energy.
#perovskite-solar-cells #inorganic-materials #solar-energy #tandem-solar-cells #efficiency-enhancement
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