High‐Throughput Deposition of Recyclable SnO₂ Electrodes toward Efficient Perovskite Solar Cells

Abstract Chemical bath deposited (CBD) SnO₂ is one of the most prevailing electron transport layers for realizing high‐efficiency perovskite solar cells (PSCs) so far. However, the state‐of‐the‐art CBD SnO₂ process is time‐consuming, contradictory to its prospect in industrialization. Herein, a simplified yet efficient method is developed for the fast deposition of SnO₂ electrodes by incorporating a concentrated Sn source stabilized by the ethanol ligand with antimony (Sb) doping. The higher concentration of Sn source promotes the deposition rate, and Sb doping improves the hole‐blocking capability of the CBD SnO₂ layer so that its target thickness can be reduced to further save the deposition time. As a result, the deposition time can be appreciably reduced from 3–4 h to only 5 min while maintaining 95% of the maximum efficiency, indicating the power of the method toward high‐throughput production of efficient PSCs. Additionally, the CBD SnO₂ substrates are recyclable after removing the upper layers of complete PSCs, and the refurbished PSCs can maintain ≈98% of their initial efficiency after three recycling‐and‐fabrication processes.