研究目的
Investigating the photovoltaic performance of surfactant-assisted MoBi2Se5 thin films for solar cell applications.
研究成果
The study successfully synthesized MoBi2Se5 thin films with and without surfactant mediation using APT. Surfactant mediation altered the surface morphology and improved the optical band gap energy, leading to enhanced photoelectrochemical performance. However, further improvements are needed to increase the conversion efficiency.
研究不足
The photoelectrochemical performance of the synthesized thin films was not significantly improved compared to earlier reports, indicating a need for further optimization in terms of surfactant use, post-deposition techniques, and dopant elements.
1：Experimental Design and Method Selection:
The study used the arrested precipitation technique (APT) for the synthesis of MoBi2Se5 thin films, with and without surfactant mediation.
2：Sample Selection and Data Sources:
MoBi2Se5 thin films were synthesized using ammonium molybdate tetra hydrate and bismuth nitrate pentahydrate as sources of Mo4+ and Bi3+ ions, respectively, and sodium selenosulfite as a precursor for Se2- ions.
3：List of Experimental Equipment and Materials:
UV-Vis Spectrophotometer (Shimadzu UV-1800), X-ray Diffraction technique (Bruker AXS, D8 Model), field emission scanning electron microscope (FE-SEM) equipped with energy dispersive X-ray analysis (EDAX) (JEOL, JSM-6360A).
4：Experimental Procedures and Operational Workflow:
The synthesis involved the use of tri-ethanolamine as a complexing agent, with the pH adjusted to 9±
5：2 using ammonia solution. The deposition was carried out for 6 hours at room temperature. Data Analysis Methods:
The optical band gap energy was calculated using the Tauc plot method, and crystallite size was determined using Scherrer’s equation.
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