Many materials have been explored as a counter electrode material to replace platinum electrode in dye-sensitized solar cells (DSSCs). In this work, Co_xS_y/Ni_xS_y/Mo_xS_y composites at two different compositions, namely, CNM10, CNM25 were synthesized via hydrothermal method. The XRD, FE-SEM, and EDX analysis of the samples confirmed the formation of CNM10 and CNM25 composites. The cyclic voltammetry (CV) study of CNM10 and CNM25 electrodes showed faster triiodide ion reduction at the electrode/electrolyte interface than the Pt electrode. The electrochemical impedance spectroscopy studies of CNM10 and CNM25 electrodes showed lower R_CT values for both CNM10 and CNM25 electrodes than that of a Pt electrode. Tafel polarization measurement showed a higher limiting current value of CNM25 followed by CNM10 and Pt electrodes. Based on these studies, DSSCs were fabricated using CNM10, CNM25, and Pt CE. CNM25 CE showed an enhanced power conversion efficiency (PCE) (7.8%) with V_OC of 824 mV, and J_SC of 15.7 mA cm⁻², whereas, Pt CE showed PCE of 6.5% with V_OC of 775 mV and J_SC of 13.2 mA cm⁻².

中文翻译：

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花状混合相CoxSy / NixSy / MoxSy复合材料的无铂染料敏化太阳能电池

已经开发出许多材料作为对电极材料来代替染料敏化太阳能电池（DSSC）中的铂电极。通过水热法合成了两种不同组成的Co _x S _y / Ni _x S _y / Mo _x S _y复合材料，即CNM10，CNM25 。样品的XRD，FE-SEM和EDX分析证实了CNM10和CNM25复合材料的形成。CNM10和CNM25电极的循环伏安法（CV）研究表明，电极/电解质界面的三碘化物离子还原速度比Pt电极快。CNM10和CNM25电极的电化学阻抗谱研究显示较低的R _CTCNM10和CNM25电极的值都比Pt电极的值大。Tafel极化测量显示出较高的CNM25极限电流值，其次是CNM10和Pt电极。基于这些研究，DSSC是使用CNM10，CNM25和Pt CE制成的。CNM25 CE在824 mV的V _OC和15.7 mA cm ^-2的J _SC下显示出更高的功率转换效率（PCE）（7.8％），而Pt CE在775 mV的V _OC和J _SC下显示出6.5％的PCE。13.2mA cm ^-2。