Sol-gel Method Producing Nano Tungsten Trioxide Films

Sol-gel treated chemically or physically method, the whole class into a solid dispersion system was highly uniform. It is mainly through pulling, spin coating method, the sol coating on a substrate film. Producing of nanometer sol-gel thin films of tungsten trioxide is simple, low cost, large-area deposition characteristics of easy, low-temperature synthesis, materials, and shape diversity. Producing of the sol-gel method is currently tungsten trioxide films generally have the following types: tungstate acidification, tungsten powder peroxide polytungstate law, tungstate ion exchange method, alcohol saline solution tungsten, tungsten catch alcoholate law. When using sol-gel method of WO3 thin Films, tungsten-containing precursor solution is acidified typically NA2WO4 H2WO4 can get through ion exchange resins. Due to the high stability of peracetic acid, peracetic acid producing of WO3 films are widely used. During the producing of the environmental humidity will affect the morphology of the film material, the higher the humidity，he higher the gap film, excellent in thin-film photovoltaic performance. Meanwhile dispersant prepared thin films have a greater influence on. The study found that organic molecules added dispersant helps to reduce the size of the film nanocrystalline particles increase the porosity of the film.

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