1. King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC), Thuwal 23955, Saudi Arabia
2. Department of Chemistry and Centre for Processable Electronics, Imperial College London, London W12 0BZ, U.K.
3. Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg 412 96, Sweden
4. Materials Science Institute of Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
5. Institut für Physik & IRIS Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
6. Research Center for Electronics and Telecommunication, Indonesian Institute of Science, Jalan Sangkuriang Komplek LIPI Building 20 level 4, Bandung 40135, Indonesia
7. Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekulé-Strasse 5, 12489 Berlin, Germany
8. Department of Physics, National Technical University of Athens, Athens GR-15780, Greece