Wu Jingjing, Liu Zhaokai, Yang Yongrui, Zhang Kun, Wang Yumeng, Guo Lutong, Guo Mengmeng, Wang Yang, Qiao Yali, Song Yanlin
Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Small Methods. 2025 Aug;9(8):e2500129. doi: 10.1002/smtd.202500129. Epub 2025 Feb 24.
Metal halide perovskite solar cells (PSCs) are emerging as promising candidates for next-generation photovoltaics aimed at green energy production. However, during solution-processed film deposition, the distinct rheological behaviors of blade coating, compared to spin coating, result in less controlled crystallization, leading to inferior film quality and limiting the power conversion efficiency (PCE) of blade-coated photovoltaics. In this work, ethylene glycol (EG) is introduced as an inert co-solvent in perovskite precursor solutions to achieve high-quality perovskite films via blade coating. The high viscosity of EG facilitates the deposition of thick perovskite films ranging from 400 to 2000 nm, while its low vapor pressure effectively suppresses premature nucleation before vacuum flashing, leading to films with enhanced morphology. As a result, the blade-coated PSCs achieve an impressive champion PCE of 24.10% and retain 89% of their initial efficiency after 600 h of continuous operation.
金属卤化物钙钛矿太阳能电池（PSCs）正成为旨在实现绿色能源生产的下一代光伏领域的有前景候选者。然而，在溶液处理的薄膜沉积过程中，与旋涂相比，刮刀涂布独特的流变行为导致结晶控制较差，从而导致薄膜质量较差，并限制了刮刀涂布光伏电池的功率转换效率（PCE）。在这项工作中，乙二醇（EG）被引入钙钛矿前驱体溶液中作为惰性共溶剂，以通过刮刀涂布获得高质量的钙钛矿薄膜。EG的高粘度有助于沉积400至2000纳米厚的钙钛矿薄膜，而其低蒸气压有效地抑制了真空闪蒸前的过早成核，从而得到形态得到改善的薄膜。结果，刮刀涂布的PSCs实现了令人印象深刻的24.10%的最佳PCE，并且在连续运行600小时后仍保持其初始效率的89%。
