1. Solar Energy Division, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany.
2. Laboratory of Semiconductor Materials, Institute of Materials, Faculty of Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
3. Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam, Germany.
4. POLYKEY Polymers, Joxe Mari Korta Center, 20018 Donostia-San Sebastian, Spain.
5. POLYMAT, University of the Basque Country UPV/EHU, 20018 Donostia-San Sebastián, Spain.
6. IKERBASQUE, Basque Foundation for Science, 48009 Bilbao, Spain.
7. Kaunas University of Technology, Kaunas, Lithuania.
8. Technische Universität Berlin, Fakultät Elektrotechnik und Informatik, 10587 Berlin, Germany.