CoS薄膜的制备及在染料敏化太阳能电池中的应用

Preparation of Cos Films and Their Application in Dye-Sensitized Solar Cells

通过简单的气-固反应法在氟掺杂的氧化锡导电玻璃(FTO)上成功制备了CoS对电极,并通过优化工艺,进一步确认了制备CoS的最佳浓度。通过扫描电镜、X射线衍射、拉曼光谱、X射线光电子能谱、电化学阻抗谱、循环伏安测试、Tafel极化曲线以及光电流密度-电压特性曲线分别研究了其表面形貌、物质结构、电催化性能和光电性能。结果表明,以20%乙酸钴制备的CoS对电极具有较高的电催化活性,在一个标准太阳光照条件(100m W·cm^(-2))下,其光电转换效率(PCE)为7.81%,短路电流密度(Jsc)为17.3m A·cm^(-2),开路电压(Voc)为0.74V,填充因子(FF)为0.61,显示出可与Pt对电极(7.97%)相比拟的性能。

Cobalt sulfide （CoS） counter electrode （CE） in dye-sensitized solar ceils （DSSC） was successfully prepared by a simple solid-gas reaction method on the conductive glass of fluorine doped tin oxide. The optimal concentration of CoS was further confirmed by optimizing the process. The surface morphology, material structure, electrocatalytic and photovoltaic performances were characterized by SEM, XRD, Raman spectroscopy, XPS, EIS, CV, Tafel polarization curves and photoelectric current density voltage characteristic curves. The results showed that CoS prepared from 20% cobalt acetate had higher electrocatalytic activity as a counter electrode. Under standard illumination of one sun （100 mW· cm^-2）, the DSSC incorporating CoS-decorated FTO glass substrate as a CE provide PCE of 7.81% with Jsc of 17.3 mA·cm^-2, Vo, of 0.74V, and FF of 0.61, which are comparable with the values obtained for the device with a Pt-based CE （ PCE ： 7.97% ）.