In this paper, the compact and ultra-thin CdS thin films with different spin cycles are deposited on the TiO₂ nanorod arrays via spin-coated-assisted successive ionic layer adsorption and reaction method using Cd(NO₃)₂ solution in methanol and the Na₂S solution in methanol/water (v/v, 95/5), and the Sb₂S₃ prepared by pyrolysis using SbCl₃-thiourea complex solution in DMF. In the Sb₂S₃-sensitized solar cells, the compact and ultra-thin CdS thin films with suitable band gap and higher electron mobility can suppress the charge recombination, the electrons of the TiO₂ conduction band, and the holes of the spiro-OMeTAD valence band, and it can also transport photogenerated electrons rapidly from Sb₂S₃ to TiO₂. The thickness and microstructure of the CdS buffer layers can be adjusted by spin cycles and the influence of the thickness and microstructure of the CdS buffer layers on the photovoltaic property of the corresponding solar cell was systematically investigated. The Sb₂S₃-sensitized solar cells with 5 layers CdS thin film achieved the best photovoltaic conversion efficiency (PCE) of 5.71% along with the open-circuit voltage (V_oc) of 0.53 V, short-circuit photocurrent density (J_sc) of 18.20 mA cm⁻², fill factor (FF) of 58.99%, and the average PCE of 5.59 ± 0.08% with the V_oc of 0.53 ± 0.01 V, J_sc of 17.72 ± 0.43 mA cm⁻², and FF of 59.05 ± 0.65%.

本文采用Cd(NO ₃ ) ₂甲醇溶液和Cd(NO ₃ ) ₂溶液在TiO ₂纳米棒阵列上通过旋涂辅助连续离子层吸附和反应方法，在TiO ₂纳米棒阵列上沉积致密超薄的CdS薄膜。Na ₂ S 的甲醇/水溶液 (v/v, 95/5)，以及使用 SbCl ₃ -硫脲复合物的 DMF 溶液通过热解制备的 Sb ₂ S ₃。在Sb ₂ S ₃敏化太阳能电池中，具有合适带隙和较高电子迁移率的致密超薄CdS薄膜可以抑制电荷复合，TiO ₂的电子导带和螺-OMeTAD价带的空穴，它还可以将光生电子从Sb ₂ S ₃快速传输到TiO ₂。CdS缓冲层的厚度和微观结构可以通过自旋循环进行调节，系统研究了CdS缓冲层的厚度和微观结构对相应太阳能电池光伏性能的影响。具有5层CdS薄膜的Sb ₂ S ₃敏化太阳能电池实现了5.71％的最佳光伏转换效率（PCE），开路电压（V _oc）为0.53 V，短路光电流密度（J_sc ) 为 18.20 mA cm ^-2，填充因子 (FF) 为 58.99%，平均 PCE 为 5.59 ± 0.08%，V _oc为 0.53 ± 0.01 V，J _sc为 17.72 ± 0.43 mA cm ^-2和 FF 59.05 ± 0.65%。