For the 10th anniversary of our popular workshop, IW-CIGSTech 10 will move to Paris. The workshop will take place in the Paris area (IPVF, 30 Route départementale 128, 91120 Palaiseau) on 23rd and 24th of May 2019. It will be hosted at the Institut Photovoltaïque d'Île de France (IPVF) and Ecole Polytechnique. IPVF is an institute for the energy transition created in 2013 by the French government in the frame of the "Investment for the future" program. The two German research institutes ZSW and HZB are co-organizers of the workshop.