1. Department of Applied Physics, Eindhoven University of Technology 1 , P.O. Box 513, 5600 MB Eindhoven, The Netherlands
2. TNO Energy Transition, Solar Energy 2 , Westerduinweg 3, 1755 ZG Petten, The Netherlands
3. IEK5-Photovoltaik, Forschungszentrum Jülich GmbH 3 , 52425 Jülich, Germany
4. ZEA3-Analytik, Forschungszentrum Jülich GmbH 4 , 52425 Jülich, Germany