WO3 film can be used to assemble a liquid electrochromic device, which acts as an electrochromic layer material. It is reported that some scholars have assembled a liquid electrochromic device with an area of about 10cm × 8cm.  The digital photos of the assembled liquid electrochromic device are shown as below.

WO3 powder, as an inorganic electrochromic material, is the most commonly used electrochromic material for preparing the electrochromic layer (electrochromic film) of electrochromic devices. And it is important to carry out X-ray diffraction analysis (XRD analysis) of the prepared WO3 film. In this regard, some experts said that as the tungsten trioxide film produced is very thin, if the film coated on the substrate is directly used for XRD analysis, the weak diffraction peak of the film will be replaced by a stronger substrate diffraction peak.

As a new type of environmentally-friendly transparent heat ray shielding material, cesium tungsten bronze has excellent visible light transmittance and can shield near-infrared rays in a wide frequency band with high shielding ratio of near-infrared rays.

As a new type of environmentally friendly near-infrared shielding material, cesium tungsten bronze is considered to be the most suitable energy-saving material for producing automotive glass windows or glass windows, doors or glass curtain walls of the buildings.