The leading international position in electrochromic materials of Chromo Genics and many years of research at the Ångström Laboratory (Uppsala, Sweden) led to a unique technology.

Using a multilayer structure composed of different materials and placed between two layers of plastic, it creates a flexible electrochromic film and light can change its transparency when a voltage of several volts is applied, this
phenomenon is called the electrochromism.

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Principle of operation of a smart window. The color of the glass can be adjusted
according to the energy received Lunine

The voltage leads the ions from a layer of nickel oxide, through a polymer
electrolyte, a layer of tungsten oxide. The two oxide layers become darker. The
reversal of polarity that the ions move in the opposite direction and both
layers become brilliant. An electronic control adjusts the degree of darkness of
the film. The control can be manual or automatic.

When the degree of darkness has been reached, the optical properties are
preserved until the next change is made (in the same way an electric battery
maintains its charge over a long period). Thus, the film uses no electricity
unless the degree of darkness is changed. This makes the film very effective
compared with other technologies existing regulatory transparency.

In addition, the film developed by Chromo Genics has a number of advantages over
competing technologies in production and profitability. Thanks to changes in the
production process, the film can be tailored to meet desired properties such as
speed and range of optical modulation, color and shape, etc.. This allows its
use in many potential applications, such as in smart windows.

The technology developed by Chromo Genics is very promising for windows and
glass facades of variable transparency. This patented technology makes it
possible to use different windows in buildings and vehicles.

Solar radiation is a significant part of heating in many offices, homes and
vehicles. It also entails the use of air conditioning during the summer. In hot
countries, which require large applications of cooling air, smart windows can
reduce energy consumption by over 50%. The smart windows can also maintain a
comfortable level of indoor light, without compromising the view with curtains
or blinds. Furthermore, the electrochromic film Chromo Genics converts
conventional windows in other so-called “intelligent”, with cost-effective,
simply by applying the film on existing windows.

Chromo Genics The company was founded in 2003 by six researchers from Uppsala
University and currently employs twenty people.