摘要： n-Type zinc oxide (ZnO) has high electron mobility, good light transmittance, and a suitable work function and is considered to be a suitable electron transport material in perovskite solar cells (PSCs). However, the chemical compatibility between ZnO and perovskites is poor, making it di?cult to prepare highly e?cient and stable PSCs by a one-step spin coating method. Here, the ZnO surface is modi?ed with three amino compounds, butylamine (BA), isobutylamine (IBA) and 2-amino-2-methyl-1-propanol (AMP). Three amino compounds can react with 3D perovskite to form a thin and more stable perovskite with a 2D structure, which can improve the stability of ZnO-based PSCs fabricated by one-step method. Interestingly, the conductivity of amine-modi?ed ZnO is also improved due to the presence of amino (NH2) and hydroxyl (OH) groups which can induce the dipole polarization. The modi?cation of amino compounds on the surface of ZnO can a?ect the hydrophilicity of ZnO surface that is related to the crystallization of perovskite ?lm. Devices with IBA modi?cation exhibit improved stability, and the power conversion e?ciency (PCE) can reach 18.84%. Therefore, we provide a new strategy to improve the surface of the ZnO electron transport layer for high-performance PSCs fabricated by a one-step method.