Luo Wanqi, Liu Jianbo, Sun Xiaoran, Yang Xiangyu, Xiang Linhu, Liu Xin, Wang Zhicheng, Wang Wufang, Yu Jian, Zhang Meng
School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China.
The Australian Centre for Advanced Photovoltaics, School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
ACS Appl Mater Interfaces. 2025 May 21;17(20):29720-29728. doi: 10.1021/acsami.5c04111. Epub 2025 May 12.
Perovskite solar cells (PSCs) often suffer from defects due to rapid crystallization in solution-based fabrication. Surface passivation using phenethylammonium iodide (PEAI) can mitigate these defects, but traditional spin-coating methods limit their scalability. Blade-coating offers a cost-effective alternative, yet blade-coating PEAI passivation layers using isopropanol (IPA) based solution face the challenge of uneven coverage and perovskite degradation. Here, we introduce dibutyl alcohol (TBA) as cosolvent to enhance viscosity of the solution, forming a stable liquid column during blade-coating. This improves uniformity and reduces the level of IPA-induced corrosion. As a result, PSC efficiency increased from 21.6% to 23.0%, with an improved open circuit voltage from 1.14 to 1.17 V. The films also exhibited excellent moisture stability, maintaining performance for 3000 h at 24 °C and 50-60% RH. This study presents a scalable, sustainable passivation strategy for large-area perovskite films, advancing the industrial viability of PSCs.
钙钛矿太阳能电池（PSC）在基于溶液的制造过程中，由于快速结晶，常常存在缺陷。使用苯乙铵碘化物（PEAI）进行表面钝化可以减轻这些缺陷，但传统的旋涂方法限制了它们的可扩展性。刮涂提供了一种经济高效的替代方法，然而，使用基于异丙醇（IPA）的溶液刮涂PEAI钝化层面临着覆盖不均匀和钙钛矿降解的挑战。在此，我们引入二丁醇（TBA）作为共溶剂来提高溶液的粘度，在刮涂过程中形成稳定的液柱。这提高了均匀性并降低了IPA引起的腐蚀程度。结果，PSC的效率从21.6%提高到23.0%，开路电压从1.14 V提高到1.17 V。这些薄膜还表现出优异的湿度稳定性，在24°C和50-60%相对湿度下保持性能3000小时。本研究提出了一种适用于大面积钙钛矿薄膜的可扩展、可持续的钝化策略，推动了PSC的工业可行性。
