Novel Ag‐Mesh Transparent Hybrid Electrodes for Highly Efficient and Mechanically Stable Flexible Perovskite Solar Cells

Abstract Metal‐mesh transparent conductive electrodes (TCEs)‐based flexible perovskite solar cells (FPSCs) have been intensively explored to improve the efficiency and stability of the devices, whereas undesired metal‐induced decomposition of perovskite during film formation process could undermine the performance and stability of device. In this work, the authors construct a novel flexible hybrid electrode combining silver (Ag) mesh‐embedded poly(ethylene terephthalate) film (PET/Ag‐mesh) with a thin indium tin oxide (ITO) layer, named PET/Ag‐mesh/ITO, which exhibits outstanding photoelectric properties, chemical stability, and mechanical durability. They introduce the thin ITO film as a barrier layer to protect perovskite from the metal‐induced degradation. In comparison, the PET/Ag‐mesh/ITO based FPSCs achieve an optimized power conversion efficiency (PCE) of 18.10%, which is among the highest reported values for metal‐mesh based FPSCs to date. Owing to the excellent properties of PET/Ag‐mesh/ITO, the corresponding FPSCs demonstrate extraordinary mechanical and thermal stability, which is comparable to that of their rigid ITO‐based counterparts.