Advancing highly efficient and mechanically resilient flexible perovskite-silicon tandem solar cells

• Perovskite-silicon tandem solar cells have achieved certified PCEs up to 34.9%, surpassing the Shockley-Queisser limit for single-junction cells. • Flexible perovskite-silicon tandems are promising for aerospace, wearable, portable, BIPV, and IoT applications, but their development lags behind rigid counterparts. • Key challenges include silicon brittleness, interfacial delamination under bending, and long-term operational stability. • Ultrathin silicon wafers with blunt edge optimization have enabled progress in flexible silicon cells and tandem fabrication.