Uli Würfel studied physics in Freiburg and Heidelberg, receiving his diploma in 2001. In 2006, he received a PhD in physics from the University of Freiburg. The thesis was about the electron transport in the nanoporous TiO2 layer of dye solar cells, carried out in close collaboration with the Fraunhofer Institute for Solar Energy Systems ISE. After that he became a project leader at Fraunhofer ISE where today he is head of the department “Dye and Organic Solar Cells”. His main research interests are characterization and modelling of organic and other type of solar cells as well as the upscaling of organic solar cells.