The Institute of Energy Research (IEK-5) – Photovoltaics belongs to the world leading research institutions in the range of thin-film photovoltaics. The IEK-5 investigates the scientific basis and the technology for efficient and cost-effective solar modules made from silicon thin-films and related materials.  We cover the entire spectrum from research and development of the materials science to process- and device design and, finally, to demonstration of industrially relevant production methods.