1. Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekulé-Strasse 5, 12489 Berlin, Germany
2. Center for Frontier Science, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba-shi, 263-8522 Chiba, Japan
3. Laboratory for Photovoltaics, Université du Luxembourg, 41, rue du Brill, L-4422 Belvaux, Luxembourg
4. Department of Materials & Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel
5. Institute for Materials Discovery, University College London, Malet Place, London, WC1E 7JE, U.K.
6. Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, U.K.
7. State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Zhejiang University, Hangzhou 310027, P. R. China
8. Institut für Physik & IRIS Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
9. Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, United States
10. Bar-Ilan Institue for Nanotechnology & Advanced Materials and Department of Chemistry, Bar-Ilan University, Ramat Gan 5290002, Israel