In 2014, Ferdinand Grapperhaus and Willem Kesteloo participated in the research group of Dr. Eric van der Kolk at Delft University of Technology. After discovering a transparent substance with interesting deflective properties, they decided to start their own company PowerWindow in 2014 and began developing energy-producing windows. Grapperhaus and Kesteloo participated in startup competitions like New Venture and PowerWindow was named ‘Europe’s best energy startup’ at the Generate 15 event in Groningen. Starting from March 30, 2016, the Delft-based startup operated under the new name Physee and is housed in the YES! Delft incubator of the Delft University of Technology. They are now working on SmartSkin, the future-proof glass facade for next-generation sustainable buildings. SmartSkin can autonomously power, sense and regulate your building’s climate. It intelligently creates a comfortable and sustainable environment tailored to you.