1. Materials and Processes Fraunhofer Center for Silicon Photovoltaics CSP Otto-Eißfeldt-Straße 12 06120 Halle Germany
2. Technologies of Photovoltaics Department of Electrical, Mechanical and Industrial Engineering (EMW) Anhalt University of Applied Sciences HSA Bernburger Straße 55 06366 Köthen Germany
3. Department of Physics University of Konstanz Universitätsstr. 10 78457 Konstanz Germany
4. DENKweit GmbH Marthastraße 13 06108 Halle Germany