In Princeton have developed “smart” windows with automatic tinting
Perhaps soon it will not be necessary to open and close the blinds or curtains to create the desired level of lighting indoors or to get rid of prying eyes. There will be windows of the future that regulate the level of transparency depending on external conditions.
A team of researchers at the University of Princeton developed a “smart window” system using transparent panels to collect solar ultraviolet radiation.
Sunlight is a real “cocktail” of waves of various lengths, including, in particular, infrared light warming the planet, as well as ultraviolet rays, which are known to be harmful in large doses. Today, the application finds mainly infrared radiation, while UV radiation is simply blocked. Scientists from Princeton have found a way to use it to power the system.
“Smart” windows are made of electrochromic material, which has the ability to change the shade from transparent to dark blue when an electric signal of low power is applied. The source of energy will be a transparent solar battery , which is part of the window. It is a thin film, glued on the glass.
According to the post-graduate student of Princeton University, chemist Nikolai Davy, the previously created smart windows worked from infrared radiation. This is not entirely rational, because infrared rays are used to heat rooms. Therefore, when creating their own power source, they bet on UFI.
Integration of film solar cells into smart windows makes them more attractive for use in residential environments and at the same time completely non-volatile. Another promising direction is the use of films for tinting automotive glasses.