Perovskite solar cells (PSCs) hold promise for future photovoltaic applications due to their high performance, low cost, and simple fabrication. The electron transport layer (ETL) plays a crucial role in PSC performance, and tin dioxide (SnO2) has gained attention as a promising ETL candidate. In this study, we investigate the use of methoxyamine hydrochloride (MOACl) as a modifier for SnO2 ETLs in PSCs. MOACl improves the film quality of SnO2, resulting in improved electrical conductivity and electron mobility. MOACl also enhances perovskite crystallization, promoting the growth of larger grain sizes and more uniform film morphology. The enhanced hydrogen bond and migration of Cl within the perovskite layer aids in optimal crystallization and significantly boosts the overall PCE of the cells from 21.67 % to 24.34 %. Moreover, MOACl-SnO2 PSCs demonstrate excellent long-term stability, retaining over 80 % of their initial efficiency after 50 days in ambient air. This work highlights the practical and effective approach of MOACl modification for controlling SnO2 defects and improving perovskite crystallization, paving the way for the development of efficient and stable PSCs.

中文翻译：

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通过盐酸甲氧胺修饰 SnO2 电子传输层提高钙钛矿太阳能电池的效率和稳定性


钙钛矿太阳能电池（PSC）因其高性能、低成本和简单的制造而有望在未来的光伏应用中得到应用。电子传输层 (ETL) 在 PSC 性能中起着至关重要的作用，二氧化锡 (SnO2) 作为一种有前途的 ETL 候选材料而受到关注。在本研究中，我们研究了使用盐酸甲氧胺 (MOACl) 作为 PSC 中 SnO2 ETL 的改性剂。 MOACl 提高了 SnO2 的薄膜质量，从而提高了导电性和电子迁移率。 MOACl 还可以增强钙钛矿结晶，促进更大晶粒尺寸和更均匀薄膜形态的生长。钙钛矿层内增强的氢键和 Cl 迁移有助于实现最佳结晶，并将电池的整体 PCE 从 21.67% 显着提高到 24.34%。此外，MOACl-SnO2 PSC 表现出优异的长期稳定性，在环境空气中放置 50 天后仍保持其初始效率的 80% 以上。这项工作突出了MOACl修饰控制SnO2缺陷和改善钙钛矿结晶的实用有效方法，为开发高效稳定的PSC铺平了道路。