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Tungsten oxide thin film is an electrochromic material with electrochromism performance. The essence of electrochromism is a typical electrochemical redox reaction, but the electrochemical redox reaction only reflects the basic chemical process. And there is no uniform conclusion about the intrinsic electrochromic mechanism of electrochromic materials. The following is an theoretical model of electrochromism phenomenon that is widely accepted and widely used by people – the small polaron model. More details, please visit: http://www.tungsten-powder.com/tungsten-oxide.html The small polaron model is also…

The electrochromic mechanism of yellow tungsten oxide thin film can be explained by the dual injection model currently accepted and applied by academics. The dual injection model, also known as the dual injection model of cations and electrons, the Faughnan model, was proposed by Faughnan in 1975. More details, please visit: http://www.tungsten-powder.com/tungsten-oxide.html The dual injection model considers that when a negative voltage is added to the WO3 film, electrons e- and cation M+ are simultaneously injected from both sides into…

Amorphous tungsten trioxide film is superior in electrochromic properties to the crystalline tungsten trioxide film. But why? According to experts, this is because amorphous tungsten trioxide is composed of a three-dimensional disordered network structure connected by W-O octahedrons. In addition to the quadrilateral tunnels present in the crystalline WO3 structure, there are also trigonal tunnels, pentagonal tunnels hexagonal tunnels, which will facilitate the migration of conductive ions. So, the amorphous tungsten trioxide thin film has better electrochromic properties than the…

Some experts have prepared Ce doped tungsten trioxide by hydrothermal method using cesium chloride and tungsten chloride as precursors. And the experts used the prepared photocatalytic material of Ce-doped tungsten trioxide for the visible light catalytic degradation of the dye methyl orange. The research results indicate: More details, please visit: http://www.tungsten-powder.com/tungsten-oxide.html As the mass ratio of W to Ce decreases, the morphology of the obtained product gradually changes from one-dimensional nanowires to agglomerated particles. When the mass ratio of W…

Tb doped tungsten trioxide has excellent photocatalytic properties. In order to improve the photochemical stability of tungsten oxide, some experts have added Tb3+ to WO3 by co-precipitation method, which enhanced the crystallinity of tungsten oxide. In this process, a small amount of Tb6WO12 were generated on the surface, which enhanced the absorption of visible light, thereby improving the visible light utilization rate and the degradation rate of Rhodamine B of WO3. In addition, WO3 has enhanced resistance to photo corrosion,…

Compared with undoped tungsten oxide, noble metal doped tungsten oxide, such as Pt-doped tungsten oxide, Pd-doped tungsten oxide, and Au-doped tungsten oxide, has better sensitivity to the main source of pollution in chemical sites such as NO2, CO, H2S, and acetone gas. More details, please visit: http://www.tungsten-powder.com/tungsten-oxide.html Some experts used DC sputtering method to prepare gas sensors by doping Pt, Pd and Au in tungsten trioxide. After comparison tests, the results show that the sensitivity of the Au-doped tungsten trioxide…

Pt doped tungsten trioxide has excellent gas sensitivity so that it can be used as a gas sensor for detecting harmful gases such as CO, H2S, NO2, acetone gas and the like. More details, please visit: http://www.tungsten-powder.com/tungsten-oxide.html As you may have known, tungsten trioxide, or WO3, is a transition metal oxide which has been successfully applied to the detection of gases such as H2S, CO, NH3 due to its excellent gas sensitivity. In order to make tungsten trioxide have better…

Ti-doped tungsten trioxide thin film is a new type of electrochromic thin film that is gradually used in the field of smart windows. Some experts used metal tungsten and titanium metal as sputtering targets to prepare Ti-doped WO3 electrochromic film on ITO glass. The results show: More details, please visit: http://www.tungsten-powder.com/tungsten-oxide.html Ti doping does not reduce the discoloration amplitude of tungsten trioxide film, but significantly increases the cycle life of the film and shortens the response time. XRD results show…

Tungsten trioxide electrochromic film can realize intelligent heat insulation performance and dimming ding in large-area building smart windows and automotive smart glass. However, it is not a common tungsten trioxide film that can satisfy the application requirements of smart windows. More details, please visit: http://www.tungsten-powder.com/tungsten-oxide.html Nowadays, the application of large-area building smart windows is getting more and more attention. So what requirements must the electrochromic materials used in large-area smart windows meet? – Large modulation amplitude, high coloring efficiency, excellent…

Crystalline WO3 film is one type of tungsten trioxide thin film, and the other is an amorphous WO3 film. The crystalline tungsten oxide film and the amorphous one are electrochromic films. Experts said that the degree of crystallization has a certain influence on the electrochromism and other performance of tungsten oxide, such as modulation amplitude and color change efficiency. The specific impact is as follows: More details, please visit: http://www.tungsten-powder.com/tungsten-oxide.html 1.0 Due to the long-range order of the crystalline tungsten…