1. Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics Technische Universität Dresden Nöthnitzer Str. 61 01187 Dresden Germany
2. Heliatek GmbH Treidler Str. 3 01139 Dresden Germany
3. Institute for Materials Research (IMO‐IMOMEC) Hasselt University Wetenschapspark 1 Diepenbeek 3590 Belgium