1. Photovoltaics and
Thin-Film Electronics Laboratory, Institute of Microengineering, École Polytechnique Fédérale de Lausanne (EPFL), Rue
de la Maladière 71b, 2002 Neuchâtel, Switzerland
2. Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
3. CSEM PV-Center, Jaquet-Droz
1. 2002 Neuchâtel, Switzerland