1. Department of Materials Science and Engineering, Solid State Physics, Uppsala University, Box 35, 75103 Uppsala, Sweden
2. Solibro Research AB, Vallvägen 5, 75651 Uppsala, Sweden
3. Department of Chemical Engineering, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden
4. Forschungszentrum Juelich GmbH, Institute of Energy and Climate Research, IEK-14: Electrochemical Process Engineering, 52425 Juelich, Germany
5. Forschungszentrum Juelich GmbH, Institute of Energy and Climate Research, IEK-5: Photovoltaik, Juelich 52425, Germany
6. Department of Materials Science and Engineering, Solid State Electronics, Uppsala University, Box 534, 75121 Uppsala, Sweden