Herein, this study reports high‐efficiency, low‐temperature ZnO based planar perovskite solar cells (PSCs) with state‐of‐the‐art performance. They are achieved via a strategy that combines dual‐functional self‐assembled monolayer (SAM) modification of ZnO electron accepting layers (EALs) with sequential deposition of perovskite active layers. The SAMs, constructed from newly synthesized molecules with high dipole moments, act both as excellent surface wetting control layers and as electric dipole layers for ZnO‐EALs. The insertion of SAMs improves the quality of PbI₂ layers and final perovskite layers during sequential deposition, while charge extraction is enhanced via electric dipole effects. Leveraged by SAM modification, our low‐temperature ZnO based PSCs achieve an unprecedentedly high power conversion efficiency of 18.82% with a V_OC of 1.13 V, a J_SC of 21.72 mA cm⁻², and a FF of 0.76. The strategy used in this study can be further developed to produce additional performance enhancements or fabrication temperature reductions.

中文翻译：

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基于高极性，非润湿自组装分子层的高效低温基于ZnO的钙钛矿太阳能电池

本文中，这项研究报告了具有最新性能的高效，低温ZnO基平面钙钛矿太阳能电池（PSC）。它们是通过将ZnO电子接受层（EAL）的双功能自组装单层（SAM）修饰与钙钛矿活性层的顺序沉积相结合的策略来实现的。SAM由具有高偶极矩的新合成分子构成，既可充当出色的表面润湿控制层，又可充当ZnO-EAL的电偶极层。插入SAM可提高PbI ₂的质量在连续沉积过程中形成层和最终的钙钛矿层，同时通过电偶极效应增强电荷提取。借助SAM修改，我们的基于ZnO的低温PSC在V _OC为1.13 V，J _SC为21.72 mA cm ^-2且FF为0.76的情况下实现了空前的高功率转换效率，为18.82％。可以进一步开发本研究中使用的策略，以提高性能或降低制造温度。