1. Institute of Chemical Sciences and Engineering, and ⊥Institute of Materials Science and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL, Station 6, CH-1015 Lausanne, Switzerland
2. Fluxim AG, Katharina-Sulzer-Platz 2, 8400 Winterthur, Switzerland
3. LOEM, Optoelectronic Molecular Laboratory, Physics Department, Pontifical Catholic University of Rio de Janeiro, PUC-Rio, Rio de Janeiro, RJ 224543-970, Brazil
4. LEO, Organic Electronics Laboratory, Physics Department, Federal University of Juiz de Fora, 36036-900 Juiz de Fora, Minas Gerais, Brazil
5. Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland