Electrochromic glass: How tungsten thin films turn into blinds.

In the future, keeping buildings cool must be a simple and, above all, energy-efficient process. And the solution already has a name: Smart glass. The glass adapts its transparency at the touch of a button or fully automatically, thus regulating the temperature and preventing the building from becoming too warm. A similar technology is currently applied in antiglare rearview mirrors. Further development has also provided a full range of glass sizes. Nowadays, smart glass comes in widths of more than two meters, making it ideal for glazing.

Tungsten-Nickel sputtering targets
Tungsten-Nickel sputtering targets for the production of electrochromic layers.

The color ranges from transparent through to dark blue. And the transparency of the glass can be adapted to respond immediately to any change in the weather. Seamlessly. It is only the switching process itself that requires a minimal amount of electrical energy. The window then maintains the selected color with no further intervention.

How smart windows work:

Our thin film materials for smart windows.

Plansee supplies the sputtering targets for manufacturing the electrochromic layers in smart windows: Tungsten and tungsten-nickel sputtering targets. Our customers use a reactive sputtering process to create the electrochromic W or WNi oxide layer from this material.

Find out more about our WNi sputtering targets.Find out more about our W (tungsten) sputtertargets.