High-Throughput Deposition of Recyclable SnO 2 Electrodes toward Efficient Perovskite Solar Cells

• Published in: Small (Weinheim an der Bergstrasse, Germany) Germany), 2024-05, Vol.20 (18), p.e2308579
• Main Authors: Ling, Xufeng, Guo, Junjun, Shen, Chengxia, Li, Yiping, Tian, Hongxing, Yuan, Xiangbao, Gui, Lin, Zhang, Xuliang, Li, Bin, Chen, Shijian, Li, Ru, Yuan, Jianyu, Ma, Wanli, Deng, Yehao
• Format: Article
• Language: English
• ISSN: 1613-6810; 1613-6829
• DOI: 10.1002/smll.202308579

Chemical bath deposited (CBD) SnO 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 SnO process is time-consuming, contradictory to its prospect in industrialization. Herein, a simplified yet efficient method is developed for the fast deposition of SnO 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 SnO 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 SnO 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.