Compared with the pure yellow tungsten oxide film (WO3 film), the nanocrystalline yellow tungsten oxide film (nanocrystalline WO3 composite film) has a significantly enhanced electrochromic optical modulation amplitude and a faster response time. And its reversibility and coloring efficiency are also improved at the same time.

Yellow tungsten oxide electrochromic glass, which is more often known as WO3 electrochromic glass, is considered to be the most promising energy-saving smart glass for large-scale commercial production. Wherein, WO3 is showing in the form of an electrochromic film, which is an important material for the electrochromic layer of electrochromic glass.

When it comes to the phenomenon of electrochromism, many people think of yellow tungsten oxide film (WO3 film) - an earliest and most studied inorganic electrochromic film material. Well, do you know what the electrochromic mechanism of crystalline WO3 film is? And what is the electrochromic mechanism of amorphous WO3 film?

Yellow tungsten oxide nanorods for application in electrochromic film are WO3 nanorods that can be synthesized by solvothermal method. For example, some experts have synthesized monodisperse tungsten oxide nanorods by solvothermal method. Wherein, the experts prepared tungsten oxide nanorods of different size by adjusting the concentration of oleylamine in the precursor, and the size of the nanorods increased from 38nm x 3.2nm to 89nm x 4.5nm. Then, the WO3 nanorods electrochromic film was constructed by heat treatment at a certain temperature.

Electrochromism refers to the phenomenon that optical properties such as transmittance and absorption of electrochromic materials undergo a stable and reversible color change under the action of an applied electric field. It means that electrochromism can occur in yellow tungsten oxide nanocrystalline composite film - an electrochromic material.

It is reported that some experts have prepared yellow tungsten oxide nanofibers (WO3 nanofibers) via electrostatic spinning with an average diameter of about 200nm. Wherein, WO3 nanofibers consist of a large amount of tungsten trioxide nano particles. These experts also studied the gas sensitivity characteristics of WO3 nanofibers-based gas sensors to H2S.

Yellow tungsten oxide cellulose nanocrystal composite film is a film of tungsten trioxide with a certain amount of cellulose nanocrystal that has the characteristics of good electrochromic performance, high transmission modulation and very good cycling stability for applications in electrochromic device. In a report, some researchers prepared the composite films of yellow tungsten oxide and cellulose nanocrystals via a sol-gel method and investigated their electrochromic properties.

Yellow tungsten oxide, which is also known as tungsten trioxide or WO3, is an n-type semiconductor material with excellent performance and wide use. For example, yellow tungsten oxide can be used as a photocatalyst that has broad application prospects in photolysis of water and degradation of organic and inorganic pollutants in the atmosphere and water.

Yellow tungsten oxide, which is also called tungsten trioxide or WO3, is developed as a photoanode to produce photoelectrochemical cell for solar energy conversion.

According to reports, researchers have prepared yellow tungsten oxide (tungsten trioxide/WO3) by air annealing of various W precursors, and examined the effects of W precursor type and pretreatment conditions on the physical properties and photocatalytic activity of the obtained yellow tungsten oxide powder.