Jin Bin Bin, Huang Hui Sheng, Kong Shu Ying, Zhang Guo Qing, Yang Biao, Jiang Chu Xing, Zhou Ya, Wang Dan Jun, Zeng Jing Hui
Chongqing Key Laboratory of Inorganic Special Functional Materials, College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China.
Chongqing Key Laboratory of Inorganic Special Functional Materials, College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China.
J Colloid Interface Sci. 2021 Sep 15;598:492-499. doi: 10.1016/j.jcis.2021.04.073. Epub 2021 Apr 17.
Antimony tin oxide (ATO)/lead selenide (PbSe) composite was rationally designed and fabricated on fluorine doped tin oxide glass (FTO) for using as counter electrode (CE) of quantum dot sensitized solar cells (QDSSCs). The electrocatalytic activity of the CE is deeply investigated in the polysulfide electrolyte by employing the Tafel, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) of the symmetrical cells. The results confirm that the ATO/PbSe CE has better electrocatalytic activity and stability than that of PbSe CE obtained by pulse voltage electrodeposition (PVD). The enhanced electrocatalytic performance of ATO/PbSe CE can be attributed to its high specific surface area, excellent permeability, conductivity and interface connectivity, which provide more electrocatalytic active sites for the reduction of polysulfide species, as well as fast channels for ions diffusion and electron transport. As a result, the CdS QDSSCs and CdS/CdSe co-sensitized QDSSCs assembled by the ATO/PbSe CE exhibits better power conversion efficiency (η) of 1.72% and 5.59%, respectively than that of PbSe CE obtained by PVD. Furthermore, photovoltaic property of the ATO/PbSe CE in CdS/CdSe co-sensitized QDSSCs keeps stable for over 200 min. This present work provides a simple and effective strategy for the construction of high-performance CE materials of QDSSCs.
锑锡氧化物（ATO）/硒化铅（PbSe）复合材料被合理设计并制备在氟掺杂氧化锡玻璃（FTO）上，用作量子点敏化太阳能电池（QDSSCs）的对电极（CE）。通过对称电池的塔菲尔曲线、电化学阻抗谱（EIS）和循环伏安法（CV），深入研究了该对电极在多硫化物电解质中的电催化活性。结果表明，ATO/PbSe对电极比通过脉冲电压电沉积（PVD）获得的PbSe对电极具有更好的电催化活性和稳定性。ATO/PbSe对电极增强的电催化性能可归因于其高比表面积、优异的渗透性、导电性和界面连通性，这些特性为多硫化物物种的还原提供了更多的电催化活性位点，同时也为离子扩散和电子传输提供了快速通道。因此，由ATO/PbSe对电极组装的CdS量子点敏化太阳能电池和CdS/CdSe共敏化量子点敏化太阳能电池分别表现出比通过PVD获得的PbSe对电极更好的功率转换效率（η），分别为1.72%和5.59%。此外，ATO/PbSe对电极在CdS/CdSe共敏化量子点敏化太阳能电池中的光伏性能在200多分钟内保持稳定。这项工作为构建高性能的量子点敏化太阳能电池对电极材料提供了一种简单有效的策略。
