Infrared light, also known as infrared light, is an electromagnetic wave with a wavelength between microwave and visible light. The wavelength is between 760 nanometers (nm) and 1 millimeter (mm), which is longer than red light and non-visible light. According to the wavelength, it can be divided into near-infrared , mid-infrared and far-infrared. Infrared light, especially near-infrared light, has an obvious thermal effect, which can easily lead to a rise in temperature, resulting in an increase in temperature such as in a room or in a car. Therefore, for the unfavorable response of infrared, the film is applied to buildings, especially architectural glass and automobiles. And with the popularity of car beauty, film is an essential part. The use of the film can not only insulate heat, but also prevent solar radiation and skin diseases, greatly prolong the service life of car interior decorations, and at the same time make the indoor temperature relatively constant. The currently disclosed near-infrared shielding materials generally refer to a class of functional thin film materials that have strong absorption or reflection of near-infrared light without affecting the transmission of visible light. It has very broad application prospects.
Near-infrared shielding materials generally refer to a type of functional film material that can absorb or reflect near-infrared light without affecting the transmission of visible light. As a transparent heat insulation material, it has a wide range of applications in the fields of green building energy saving and automotive glass heat insulation. application prospects. The reported inorganic materials with strong near-infrared absorption or reflection properties are mainly concentrated on conductive oxides, such as antimony tin oxide (ATO), indium tin oxide (ITO) and aluminum zinc oxide (AZO). Thin films can generally shield near-infrared light with a wavelength greater than 1500 nm.
The near-infrared shielding performance of cesium tungsten bronze (CsxWO3) has only been discovered in recent years. CsxWO3 film can shield near-infrared light with a wavelength greater than 1 100 nm. After the glass surface is coated with CsxWO3 film, its near-infrared shielding performance and heat insulation The performance is enhanced with the increase of cesium content in CsxWO3, and the glass coated with CsxWO3 thin film has the best thermal insulation performance, and the thermal insulation temperature difference can reach 13.5 °C compared with blank glass. Therefore, it has more excellent near-infrared shielding performance, and is expected to be widely used as a smart window in the fields of building and automotive glass heat insulation.
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