Tian Shun, Gao Xiao-Xin, Reyes David, Syzgantseva Olga A, Baytemirov Milorad M, Shibayama Naoyuki, Kanda Hiroyuki, Schouwink Pascal A, Fei Zhaofu, Zhong Liping, Tiranito Farzaneh Fadaei, Fang Yanyan, Dyson Paul J, Nazeeruddin Mohammad Khaja
Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, CH-1015, Switzerland.
Interdisciplinary Centre for Electron Microscopy, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, 1015, Switzerland.
Small. 2024 Nov;20(47):e2406929. doi: 10.1002/smll.202406929. Epub 2024 Aug 24.
Chemical bath deposition (CBD) is an effective technique used to produce high-quality SnO electron transport layers (ETLs) employed in perovskite solar cells (PSCs). By optimizing the CBD process, high-quality SnO films are obtained with minimal oxygen vacancies and close energy level alignment with the perovskite layer. In addition, the 3D perovskite layers are passivated with n-butylammonium iodide (BAI), iso-pentylammonium iodide (PNAI), or 2-methoxyethylammonium iodide (MOAI) to form 3D/2D heterojunctions, resulting in defect passivation, suppressing ion migration and improving charge carrier extraction. As a result of these heterojunctions, the power conversion efficiency (PCE) of the PSCs increased from 21.39% for the reference device to 23.70% for the device containing the MOAI-passivated film. The 2D perovskite layer also provides a hydrophobic barrier, thus enhancing stability to humidity. Notably, the PNAI-based device exhibited remarkable stability, retaining approximately 95% of its initial efficiency after undergoing 1000-h testing in an N environment at room temperature.
化学浴沉积（CBD）是一种用于制备高质量氧化锡电子传输层（ETL）的有效技术，该电子传输层应用于钙钛矿太阳能电池（PSC）中。通过优化CBD工艺，可获得具有最少氧空位且与钙钛矿层能级紧密匹配的高质量氧化锡薄膜。此外，用正丁基碘化铵（BAI）、异戊基碘化铵（PNAI）或2-甲氧基乙基碘化铵（MOAI）对三维钙钛矿层进行钝化，以形成三维/二维异质结，从而实现缺陷钝化、抑制离子迁移并改善电荷载流子提取。由于这些异质结，PSC的功率转换效率（PCE）从参考器件的21.39%提高到了含有MOAI钝化薄膜器件的23.70%。二维钙钛矿层还提供了一个疏水屏障，从而增强了对湿度的稳定性。值得注意的是，基于PNAI的器件表现出显著的稳定性，在室温下的氮气环境中经过1000小时测试后，仍保留其初始效率的约95%。
