Holger Neuhaus started his career in photovoltaics with a diploma thesis on "Characterisation of MIS/IL solar cells utilising temperature-dependent electrical measurements" at the Institute for Solar Energy Research Hameln ISFH in 1996. He completed his Doctor of Philosophy on "Electrical characterisation of crystalline silicon for thin-film solar cells" at the Faculty of Electrical Engineering at the University of New South Wales in Sydney, Australia, in 2002. He started his professional career during his PhD as a development engineer at Pacific Solar Pty Ltd in Sydney in 2001. He contributed to increasing the efficiency of polycrystalline silicon solar cells on glass using electrical and optical characterisation. From 2003 to 2018, Holger Neuhaus worked in various positions for Solarworld AG in Freiberg, initially responsible for quality assurance and technology in cell production at Deutsche Cell GmbH, later managing global R&D activities entire value chain at Solarworld Innovations GmbH, since 2009 as Managing Director. Holger Neuhaushas transferred key technologies into products that dominate the market today: Production control system in solar cell manufacturing, alkaline texture for monocrystalline solar cells, laser edge isolation, multi-crystalline silicon with nucleation template, diamond wire sawing with 60 µm wire diameter, PERCsolar cell technology in high-volume manufacturing, laser-doped selective emitter, oxidation for emitter passivation, 2 mm glass-glass module technology, 3- and 5-busbar as well as the half-cell technology, bifacial technology for PERC solar cells and modules. Since 2018, Holger Neuhaus is in charge of the Module Technology Department at the Fraunhofer Institute for Solar Energy Systems ISE, focusing on the following areas: Round wire interconnection using soldering, shingle interconnection using a conductive adhesive, lamination, interconnection and encapsulation technologies for silicon perovskite solarcells, material development for solar modules, product development forbuilding-, vehicle- and road-integrated photovoltaics, power and yield calculations via detailed loss analysis, product reliability using accelerated test methods, IEC testing and FEM simulation, life cycle analysis, sustainability and recycling of modules, production technology and manufacturing costs.