Buried Interlayer Induced 1D Perovskite Seeds Enable Over 31%‐Efficiency Perovskite/TOPCon Tandem Solar Cells

) and fill factor (FF) of single-junction wide bandgap perovskite solar cells are significantly improved, and the power conversion efficiency (PCE) reaches 21.45%. The initial efficiency of the packaging device is maintained at 80% after continuous illumination for 700 h (AM 1.5G) under 50-60% humidity conditions. In addition, this method enables the certification efficiency of perovskite/TOPCon tandem solar cells to exceed 31%.