Christophe Ballif received his Ph.D. degree in physics in 1998 in Lausanne, Switzerland. After Stays at NREL, Fraunhofer ISE and EMPA, he became in 2004 Full Professor with the Institute of microengineering, University of Neuchâtel, Switzerland, directing the Photovoltaics and Thin-Film Electronics Laboratory. In 2009, the Institute became part of EPFL. Since 2013, he has also been the Director of the PV-Center within CSEM, Neuchâtel, an RTO specialized in industrial research and technology transfer. His research interests include materials for PV, high-efficiency c-Si solar cells and silicon heterojunction cells, multi-junction solar cells, module technology, BIPV, and Energy systems. Christophe Ballif is the laureate of the 2016 Becquerel Prize.