Abstract Nickel sulphide-reduced graphene oxide (NiS-rGO) composite films have been prepared via modified Hummers’s method assisted with spin coating technique. The NiS-rGO samples were then employed as counter electrode in a dye-sensitized solar cell (DSSC). The main aim of this work is to investigate the relationship between the concentrations of NiCl2 with the properties of NiS-rGO and performance parameters of the device. The dominant rGO and minor NiS phase exist in the composite. The morphology of the composite is white strips rGO and NiS agglomerate particle. The element of C, O, Ni and S present in the composite. The highest η of 1.04% and Jsc of 7.39 mA cm−2 were obtained from the device with 0.06 M NiCl2 resulted from the longest carrier lifetime. The photovoltaic parameters results reveal that NiS-rGO composite has potential to become as a free platinum counter electrode of DSSC.

中文翻译：

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硫化镍还原氧化石墨烯复合材料作为染料敏化太阳能电池的对电极：氯化镍浓度的影响

摘要 采用改进的 Hummers 法和旋涂技术制备了硫化镍还原氧化石墨烯 (NiS-rGO) 复合薄膜。然后将 NiS-rGO 样品用作染料敏化太阳能电池 (DSSC) 中的对电极。这项工作的主要目的是研究 NiCl2 浓度与 NiS-rGO 特性和器件性能参数之间的关系。复合材料中存在主要的 rGO 和次要的 NiS 相。复合材料的形貌为白色条状 rGO 和 NiS 团聚颗粒。复合材料中存在 C、O、Ni 和 S 元素。由于载流子寿命最长，使用 0.06 M NiCl2 的器件获得了 1.04% 的最高 η 和 7.39 mA cm-2 的 Jsc。