Abstract This study demonstrated a single-step potentiostatic method for the electrodeposition of copper (I) sulfide (Cu2S) nanoparticles onto fluorine-doped tin oxide (FTO) electrode from an aqueous solution of CuCl2 and thiourea (TU) to develop counter electrodes (CEs) for quantum-dot sensitized solar cells (QDSSCs). The homogeneously distributed and optimized Cu2S–CE exhibited an improved catalytic activity in the reduction of polysulfide (S2−/Sn2−) electrolyte, which resulted in a power conversion efficiency (PCE) of 4.24% with a short-circuit current density (Jsc), open-circuit voltage (Voc), and fill factor (FF) of 19.60 mA/cm2, 0.445 V, and 48.62%, respectively, for PbS/CdS/ZnS QDs sensitized QDSSCs, while the Pt counterpart exhibited a PCE of 1.17%. The superior photovoltaic performance of this Cu2S–CEs based QDSSC compared to the Pt counterpart is due to its greater electrocatalytic activity and lower charge transfer resistance (RCT) at the Cu2S–CEs/(S2−/Sn2−) interface. This strategy provides an effective, low-cost, and non-Pt electrode for QDSSCs, which is promising for other electrochemical applications.

中文翻译：

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Cu 2 S 纳米粒子在掺氟氧化锡上的电沉积，用于量子点敏化太阳能电池的高效对电极

摘要 本研究展示了一种将硫化铜 (I) (I) 硫化物 (Cu2S) 纳米颗粒从 CuCl2 和硫脲 (TU) 的水溶液中电沉积到掺氟氧化锡 (FTO) 电极上的单步恒电位方法，以开发对电极 (CEs)。 ) 用于量子点敏化太阳能电池 (QDSSC)。均匀分布和优化的 Cu2S-CE 在多硫化物 (S2-/Sn2-) 电解液的还原中表现出更高的催化活性，在短路电流密度 (Jsc) 下功率转换效率 (PCE) 为 4.24% PbS/CdS/ZnS QDs 敏化 QDSSCs 的开路电压 (Voc) 和填充因子 (FF) 分别为 19.60 mA/cm2、0.445 V 和 48.62%，而 Pt 对应物的 PCE 为 1.17% . 与 Pt 对应物相比，这种基于 Cu2S-CEs 的 QDSSC 的优异光伏性能是由于其在 Cu2S-CEs/(S2-/Sn2-) 界面处具有更高的电催化活性和更低的电荷转移电阻 (RCT)。该策略为 QDSSCs 提供了一种有效、低成本和非 Pt 的电极，有望用于其他电化学应用。