Transparent and patented energy producing windows

Climate-KIC Start-Up

Founding Year: 2014

Location: The Netherlands

The first sustainable innovation of Physee is the PowerWindow. PowerWindows are patented and transparent double-paned windows that convert light into electricity. Physee developed a luminescent thin-film coating to produce clear and colorless windows that can be integrated in the design of any building without compromising the functionality or esthetics thereof, making it highly suitable for the built environment. 

It provides 50W per square meter, which can compensate up to 75% of the energy consumption of buildings, unlike solar panels that have a limited surface area for buildings or alternative smart window solutions that have low conversion efficiencies and affect the user-experience of windows. Physee increases the energy efficiency of your building with a strong business case by combining windows with solar panels thereby tremendously reducing the payback time.


Willem Kesteloo

Team Members: Ferdinand Grapperhaus (Applied Physics, M.Sc.), Willem Kesteloo (Applied Physics, M.Sc.)