This study builds upon the success achieved from commercial self-assembled monolayers (SAMs), such as Me-4PACz, by replacing its flexible butyl linker with a conjugated phenylene ring to form a SAM molecule, Me-PhpPACz, for inverted perovskite solar cells (PSCs). The Me-PhpPACz-derived PSCs exhibited an unprecedented power conversion efficiency of 26.17% with an extremely high fill factor of 86.79% and exceptional long-term stability. The result from ultrafast spectroscopy shows that phenylene-linked SAMs not only modulate the work function of indium tin oxide electrode but also facilitate charge carrier extraction and transport. Our detailed study helps deepen our understanding of the delicate relationship between SAM molecular design and PSC performance, paving the way for further enhancing the efficiency and stability of PSCs.

这项研究建立在商业自组装单层 (SAM)（例如 Me-4PACz）所取得的成功之上，通过用共轭亚苯基环取代其柔性丁基连接基，形成 SAM 分子 Me-PhpPACz，用于倒置钙钛矿太阳能电池。 PSC）。 Me-PhpPACz 衍生的 PSC 表现出前所未有的 26.17% 的功率转换效率、86.79% 的极高填充因子和卓越的长期稳定性。超快光谱结果表明，亚苯基连接的 SAM 不仅可以调节氧化铟锡电极的功函数，还可以促进电荷载流子的提取和传输。我们的详细研究有助于加深我们对SAM分子设计与PSC性能之间微妙关系的理解，为进一步提高PSC的效率和稳定性铺平道路。