研究目的
Investigating the synthesis and electrochromic performance of nanoporous γ-WO3 thin films for energy harvesting applications.
研究成果
The nanoporous-nanocrystalline γ-WO3 thin films exhibited large optical modulation, high reversible redox behavior, and good cyclic stability up to 500 cycles, making them suitable for electrochromic devices in energy harvesting applications. The thermal treatment effectively modified the film surface into nanospheres, enhancing its electrochromic properties.
研究不足
The study focuses on the impact of thermal treatment on the electrochromic properties of γ-WO3 thin films. Potential limitations include the scalability of the sputtering process for large-area applications and the long-term stability of the electrochromic performance under continuous cycling.
1：Experimental Design and Method Selection:
DC magnetron sputtering in a reactive environment (Ar:O2 = 2:1) at room temperature was used to grow nanoporous γ-WO3 thin films on ITO coated glass substrates. A thermal treatment (250 °C) was applied to modify the film surface into nanospheres.
2：Sample Selection and Data Sources:
ITO coated glass substrates were used as the base for film deposition. The substrates were cleaned using standard RCA procedure and masked for electrode material deposition.
3：List of Experimental Equipment and Materials:
Sputtering target of tungsten (99.99% purity), ITO coated glass substrates, mass flow controller (MFC) for gas mixture control, turbo molecular pump, and rotary pump for chamber evacuation.
4：99% purity), ITO coated glass substrates, mass flow controller (MFC) for gas mixture control, turbo molecular pump, and rotary pump for chamber evacuation.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The chamber was evacuated to a base pressure, followed by the introduction of a reactive gas mixture. The target was pre-sputtered to remove surface contaminations before deposition. Post-deposition, thermal annealing was performed to modify the film surface.
5：Data Analysis Methods:
XRD, FE-SEM, AFM, and EDX were used for physical property analysis. UV–Vis spectroscopy and CV were employed for optical and electrochromic behavior analysis.
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