The porthole of Boeing 787 has no light shield, but it can change the light transmittance! You just need to press the button, and the porthole will become a "chameleon" until it is completely dark! Of course, when night falls, the captain can also dim it directly from the cockpit. In addition, because the color changing process of this "electronic curtain" is gradual, you don't have to worry about the discomfort of your eyes. What's more, when an unexpected power failure occurs, the porthole will become completely transparent and meet the relevant aviation standards. At this point, some readers may ask, "in this way, can you easily install the Boeing 787 'dream window' home?". It just seems impossible. In fact, you can enjoy it like a Boeing 787 just by using the black technology of tungsten oxide electrochromic film!
What is the concept of electrochromism?
Electrochromism refers to the phenomenon that the optical properties (reflectivity, transmittance, absorptivity, etc.) of a material change stably and reversibly under the action of an applied electric field, which is manifested in the reversible change of color and transparency in appearance.
What is the principle of electrochromism?
The principle of electrochromism is to use electric energy to change the color of conductive medium sandwiched between two layers of glass, such as thin film or gel thin layer. The current flows through the transparent conductive layer inside the outer glass, causing a chemical reaction in the electrochromic medium, thus causing a change in the transparency of the medium.
What is the concept of electrochromism?
Electrochromism refers to the phenomenon that the optical properties (reflectivity, transmittance, absorptivity, etc.) of a material change stably and reversibly under the action of an applied electric field, which is manifested in the reversible change of color and transparency in appearance.
What is the principle of electrochromism?
The principle of electrochromism is to use electric energy to change the color of conductive medium sandwiched between two layers of glass, such as thin film or gel thin layer. The current flows through the transparent conductive layer inside the outer glass, causing a chemical reaction in the electrochromic medium, thus causing a change in the transparency of the medium.
Tungsten oxide has electrochromic properties, that is, it is an electrochromic material. Devices made of electrochromic materials are called electrochromic devices. So, what are the other applications of tungsten oxide thin film electrochromic devices? At present, the industrialized electrochromic devices also include displays, auto anti glare rear-view mirrors, etc. Electrochromic materials have bistable properties. Therefore, electrochromic displays made of electrochromic materials not only do not need backlights, but also do not consume power as long as the display content does not change after displaying static images, so as to achieve the purpose of energy saving. As for the auto anti glare rearview mirrors, the current rearview mirrors are mostly made of liquid crystal materials, which can only be switched between light and dark, bringing an uncomfortable feeling to people's eyes. Especially in summer, when the sun is strong, the strong sun will stab people's eyes and easily lead to traffic accidents. However, the automotive rearview mirror with electrochromic property can continuously and automatically adjust its reflectivity according to the external conditions, making people feel comfortable.
In practical applications, especially in the preparation of electrochromic devices, electrochromic materials should generally meet the following requirements: good electrochemical redox reversibility; Fast color change response; Reversible change of color; Highly sensitive to color change; High cycle life; It has certain storage and memory function; Stable chemical properties.
Electrochromic materials are widely used in information, electronics, energy, architecture and national defense. As one of the most promising smart materials, electrochromic materials have been widely studied. Among them, inorganic metal oxides are the most fully studied, especially WO3. At present, many devices made of WO3 electrochromic materials have been used in the market. In the future, driven by the implementation of national environmental protection policies and the urgent demand for energy conservation and emission reduction, the "dream window" of the same model as the Boeing 787 will be easily and cheaply installed in your home.
