1. Opto-Electronic Materials Section, DelftChemTech, Delft University of Technology, Julianalaan 136, 2628 BL, Delft, The Netherlands, Karlsruhe Institute of Technology (KIT), Forschungszentrum Karlsruhe (FZK), Institute for Nanotechnology (INT), Postfach 3640, D-76021 Karlsruhe, Germany, Center for Functional Nanostructures (CFN), University of Karlsruhe (TH), D-76021 Karlsruhe, Germany, Karlsruhe Institute of Technology, Universität Karlsruhe (TH), D-76021 Karlsruhe, Germany, and Fakultät für Angewandte...