Joris Libal is scientist at the ISC Konstanz. After obtaining his PhD at the University of Konstanz and a post-doc fellowship at the University Milano-Bicocca he worked for the Italian company Silfab as R&D Manager with responsibility for the company's internal and external research and development projects in the field of solar cells and PV modules as well as for the PV module certification process (UL and IEC) for production sites in Canada and Croatia. Since 2012 he has been working at the ISC in the field of highly efficient n-type rear contact solar cells and innovative module technology. Radovan Kopecek is scientist at, and one of the founders of, the International Solar Energy Research Center Konstanz (ISC Konstanz), Germany. Prior to this, he headed several national and international projects at the University of Konstanz as a group leader. At the ISC, Dr Kopecek has been working at the institute as a full time manager and researcher since January 2007, and is currently the head of the Advanced Solar Cells department. He is responsible for several European and national research projects that revolve around silicon feedstock and around the development of solar cells, with a focus on n-type devices.