研究目的
To improve the catalytic activity of ternary transition metal sulfoselenide films for dye-sensitized solar cells (DSSCs) by electrodeposition technique and sulfur doping.
研究成果
The sulfur-doped MSex films exhibit enhanced electrocatalytic activity and photovoltaic performance in DSSCs, achieving higher PCEs than Pt CEs. This demonstrates the potential of sulfur-doped MSex films as low-cost, efficient CEs for DSSCs.
研究不足
The study focuses on the electrodeposition technique and sulfur doping for enhancing the catalytic activity of MSex films. The scalability and long-term stability of the fabricated DSSCs under real-world conditions are not addressed.
1：Experimental Design and Method Selection:
The study employs a potential reversal electrodeposition technique to fabricate sulfur-doped MSex films. The morphology and electronic structure are controlled by adjusting the S/Se ratio in the electrodeposition solutions.
2：Sample Selection and Data Sources:
Cobalt chloride hexahydrate and nickel chloride hexahydrate are used as Co and Ni sources, selenium oxide as Se source, and thiourea as S source. The films are directly employed as CEs for DSSCs.
3：List of Experimental Equipment and Materials:
CHI660E electrochemical workstation, SEM (Quanta 250 FEG, FEI), TEM (JEOL 2100F), XPS (Thermo Scientific, Escalab 250Xi).
4：Experimental Procedures and Operational Workflow:
The electrodeposition process involves multi-potential steps through a three-electrode system. The films are characterized by SEM, TEM, and XPS. DSSCs are assembled with the fabricated CEs and their performance is evaluated.
5：Data Analysis Methods:
The electrocatalytic activity is evaluated by CV, EIS, and Tafel polarization curves. The photovoltaic performance is assessed by J-V curves.
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