Antimony tin oxide/lead selenide composite as efficient counter electrode material for quantum dot-sensitized solar cells
| Autor: | Jinghui Zeng, Biao Yang, Chu Xing Jiang, Dan Jun Wang, Ya Zhou, Hui Sheng Huang, Bin Bin Jin, Shu Ying Kong, Guo Qing Zhang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Tafel equation
Auxiliary electrode Materials science Doping 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Tin oxide 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Dielectric spectroscopy Biomaterials chemistry.chemical_compound Colloid and Surface Chemistry chemistry Chemical engineering Quantum dot Cyclic voltammetry 0210 nano-technology Lead selenide |
| Zdroj: | Journal of colloid and interface science. 598 |
| ISSN: | 1095-7103 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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