Tungsten Trioxide Thin Film Nano Spray Method

Tungsten trioxide thin film nano-spray method to solve the hydrothermal method for the preparation of large-area film and electrodeposition deposition film stability problems. High-quality molybdenum-doped tungsten trioxide nanoparticles were prepared by a simple, green solution doping technique. These nanoparticles can be uniformly dispersed in water to form a stable nano-ink.

In combination with the in-situ thermal oxidation spraying technique, many oxygen vacancy defects existing in the particles are eliminated under the premise of maintaining the film nano-particle structure, thereby improving the light modulation range of the electrochromic film of tungsten trioxide. This molybdenum-doped tungsten trioxide nanoparticle film has a light modulation range of 42.9% and a coloring and reaction time of 10 and 7.5 seconds, respectively.

Nano-spray method can be prepared nanocrystalline orientation-oriented high-quality molybdenum-doped tungsten oxide ultrafine nanowires. It is a diameter of about 3 nm, while evenly dispersed in water to form a stable nano-ink. Spread nanowires onto heated conductive glass. Directional attachment of nanocrystals will grow into nanoparticles, causing the nanowires to break.

Due to the cross-network structure of nanowires, porous electrochromic films are finally prepared without any hard or soft template. This kind of tungsten trioxide porous electrochromic thin film preparation technology can be enlarged under laboratory conditions to prepare a large size electrochromic device. This coating technology is expected to replace the vacuum coating process in the future, reducing the cost of large-area electrochromic devices.

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