1. Competence Centre for Thin Film and Nanotechnology for Photovoltaics; Helmholtz-Zentrum Berlin; Schwarzschildstr. 3 12489 Berlin Germany
2. Hochschule Ulm; Albert-Einstein-Allee 55 89081 Ulm Germany
3. Helmholtz-Zentrum Berlin; Institute of Heterogeneous Material Systems; Albert-Einstein-Str. 15 12489 Berlin Germany
4. Leibniz Institute IHP; Im Technologiepark 25 15236 Frankfurt (Oder) Germany
5. Bosch Solar CISTech GmbH; Münstersche Str. 24 14772 Brandenburg an der Havel Germany