硒化铅
氧化锡
辅助电极
材料科学
量子点
硒化物
光电子学
无机化学
锡
电极
复合数
量子点太阳电池
锑
电解质
太阳能电池
纳米技术
化学
复合材料
兴奋剂
聚合物太阳能电池
冶金
硒
物理化学
作者
Bin Jin,Hui Huang,Shu Ying Kong,Guo Qing Zhang,Biao Yang,Chu Xing Jiang,Yuenan Zhou,Dan Jun Wang,Jing Zeng
标识
DOI:10.1016/j.jcis.2021.04.073
摘要
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.
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