Abstract
All-perovskite tandem solar cells (TSCs) show great potential for achieving efficiencies beyond the Shockley–Queisser limit owing to their excellent photovoltaic properties and cost effectiveness. In this review, the current status of all-perovskite TSCs as well as recent research progress are introduced with a focus on three main strategies: optimization of the interconnecting layer (ICL), suppression of tin oxidation in low-bandgap perovskites, and prevention of halide segregation in wide-bandgap perovskites. The development of triple-junction all-perovskite devices and remaining issues facing all-perovskite TSCs are also discussed.
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