1. Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Electrical and Microengineering (IEM), Photovoltaics and Thin-Film Electronics Laboratory (PV-Lab), Maladière 71b, 2000 Neuchâtel, Switzerland
2. Department of Radiation Science and Technology, Faculty of Applied Sciences, Delft University of Technology, 2629JB Delft, The Netherlands
3. Interdisciplinary Centre for Electron Microscopy, EPFL, 1015 Lausanne, Switzerland
4. CSEM Sustainable Energy Center, Jaquet-Droz 1, 2002 Neuchâtel, Switzerland