Manipulation of interfacial defects and carrier extraction or transport are crucial for improving the operational stability and photovoltaic performance of perovskite solar cells (PSCs). Here, we propose a technique utilizing bridge molecules to construct a carrier viaduct between perovskite bulk and hole-transporting layers. A molecular bridge configuration combining organic functional groups from each layer was used. The designed bridge molecules not only ensure homogeneous contact and promote carrier extraction/transport but also passivate various defects and redistribute the surface potential. The developed device showed an exceptional power conversion efficiency (PCE) of 25.49% with enhanced operational stability. The treated PSCs could retain over 94% of their initial PCEs after 1000 h of continuous operation under 1 sun illumination and over 95% of their initial PCEs after 500 h of aging at approximately 85 °C in dry air with a relative humidity of 20%. This work provides a simple yet effective approach for fabricating perovskite photovoltaics with outstanding performance and operational stability.

中文翻译：

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高效 FAPbI3 基钙钛矿太阳能电池桥接分子的设计

界面缺陷和载流子提取或传输的控制对于提高钙钛矿太阳能电池（PSC）的运行稳定性和光伏性能至关重要。在这里，我们提出了一种利用桥分子在钙钛矿体层和空穴传输层之间构建载流子高架桥的技术。使用结合各层有机官能团的分子桥结构。设计的桥分子不仅确保均匀接触并促进载流子提取/传输，而且还钝化各种缺陷并重新分布表面电势。所开发的器件显示出 25.49% 的卓越功率转换效率 (PCE)，并增强了运行稳定性。经过处理的 PSC 在 1 个太阳光照下连续运行 1000 小时后，可以保留超过 94% 的初始 PCE；在约 85°C、相对湿度为 20% 的干燥空气中老化 500 小时后，可以保留超过 95% 的初始 PCE。 。这项工作提供了一种简单而有效的方法来制造具有出色性能和运行稳定性的钙钛矿光伏电池。