Nano Crystalline Tungsten Trioxide Film

Nano crystalline tungsten trioxide film has excellent electrochromic properties for applying in building glass to obtain smart glass with heat insulating performance. From a material point of view, the electrochromic properties of tungsten oxide thin films are mainly related to the ion diffusion coefficient and the diffusion pathway. Therefore, some experts have controlled the structure and morphology of tungsten oxide to improve the electrochromic performance of the transparent tungsten oxide film.

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In addition, the experts synthesized nano crystalline tungsten oxide thin film by a Langmuir Blodgett self-assembly method. The nano particles of the film are closely arranged in an orderly manner like pebbles, and at the same time, nano-scale pores are generated, providing more active sites for Li-ion diffusion and shorten the diffusion path, which is more favorable for ion diffusion. The results show that the tungsten oxide film with nanocrystalline structure has very fast coloring and bleaching time of 3.6s and 3.1s, and high coloring efficiency of 71.3cm2C-1, and has good cycle stability. And the CV cycle curve hardly changed after 1000 cycles.

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