研究目的
Investigating the preparation and properties of WO3 electrochromic film using the sol-gel method to reduce costs and enhance performance.
研究成果
The sol-gel method effectively produces WO3 electrochromic films with high contrast ratios, especially when annealed at 573K. The precursor's color change indicates a chemical reaction beneficial for film preparation. The amorphous structure of the film facilitates Li+ injection, enhancing electrochromic performance.
研究不足
The study is limited by the specific conditions of the sol-gel method and annealing temperatures used, which may not cover all potential variations in film preparation.
1：Experimental Design and Method Selection:
The sol-gel method was selected for preparing WO3 films due to its cost-effectiveness and ability to produce large-size films.
2：Sample Selection and Data Sources:
Tungsten (purity:
3：9%) was mixed with hydrogen peroxide (mass fraction:
30%) to prepare the precursor.
4：List of Experimental Equipment and Materials:
Magnetic stirrer, spin coater, SEM, XRD, UV spectrophotometer.
5：Experimental Procedures and Operational Workflow:
The precursor was stirred for varying times, spin-coated onto ITO glass, annealed at different temperatures, and assembled into an electrochromic device with an electrolyte layer.
6：Data Analysis Methods:
The films were analyzed using SEM for surface morphology, XRD for crystallization, and UV spectrophotometer for transmittance.
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