The intrinsic characteristics of a ZnO electron transport layer (ETL) lead to severe charge loss in perovskite solar cells (PSCs), such as photogenerated charge accumulation recombination in the perovskite layer due to the low electron extraction capacity, and defect‐induced charge recombination at the interface due to the unfavorable defects, causing efficiency loss and device hysteresis. Here, the polar molecule of (2‐aminothiazole‐4‐yl)acetic acid (ATAA) is self‐assembled onto a ZnO layer with the help of oxygen vacancy defects, combining the advantages of lowering the work function by forming the permanent interface dipole and simultaneously passivating defect states. It effectively strengthens the electron extraction capacity and reduces the density of defect states. Therefore, the resulting PSCs with a ZnO–ATAA ETL yield an enhanced efficiency of 19.74% with evidently reduced device hysteresis.

中文翻译：

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结合极性分子钝化钙钛矿型太阳能电池的缺陷

ZnO电子传输层（ETL）的固有特性会导致钙钛矿太阳能电池（PSC）中出现严重的电荷损失，例如由于电子提取能力低而导致钙钛矿层中的光生电荷积累复合，以及缺陷诱导的电荷复合由于不良缺陷导致接口损坏，从而导致效率损失和设备滞后。在此，借助氧空位缺陷，将（2-氨基噻唑-4-基）乙酸（ATAA）的极性分子自组装到ZnO层上，结合了通过形成永久性界面偶极子降低功函数的优点同时钝化缺陷状态。它有效地增强了电子提取能力并降低了缺陷态的密度。因此，