Tungsten Oxide Electrochromic Film

A variety of color-changing films can be seen everywhere in life, and the materials for making color-changing films are very wide. One of the new materials is the tungsten oxide electrochromic film.

Tungsten oxide electrochromic film is widely used in display devices, dimming glass, information storage and other fields. In some civil product fields, TOEF could be used for building positive energy windows, automotive anti-glare rearview mirrors, color-changing glasses, color-changing sunroofs for automobiles, etc., which have low voltage, low energy consumption, memory function, etc. And TOEF is easy to make large-area production. Compared with other color-changing film products, this new type of oxide film material has outstanding advantages such as outstanding wide-area transmittance, good stability, and low raw material price.

In the large family of electrochromic films, there are inorganic electrochromic films, organic electrochromic films, composite electrochromic films, and tungsten oxide electrochromic films are one of them. The material has a transparent anode layer, an ion storage layer, an ion conductive layer, an electrochromic material layer and a cathode conductive layer. The special structural composition makes the tungsten oxide electrochromic film have good cycle stability. Because of that advantage, TOEF is widely used in the field of information storage.

There are many methods to obtain tungsten oxide electrochromic film. Common preparation methods include sol-gel method, chemical deposition method, magnetron sputtering method, chemical vapor deposition method, pulsed laser deposition method, electron beam evaporation deposition method, etc., and all of them have different applications in the industrial field.

Compared with the advantages of tungsten oxide electrochromic film, its own poor reversibility, long-time response, and instability during application in special environments are obstacles in industrial applications. It is also one of the topics that researchers are constantly researching and committing to overcome.

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