1. Photovoltaic
Materials and Devices, Department of Electrical Sustainable Energy, Delft University of Technology, 2600 GA Delft, The Netherlands
2. Faculty
of Electrical Engineering, University of Ljubljana, Tržaška
cesta 25, 1000 Ljubljana, Slovenia
3. Photovoltaics
and Thin-Film Electronics Laboratory, Institute of Microengineering
(IMT), École Polytechnique Fédérale de Lausanne (EPFL), 2000 Neuchâtel, Switzerland
4. Institute
of Photovoltaics, Forschungszentrum Jülich GmbH, Jülich 52425, Germany