1. Solar & Photovoltaics Engineering Research Center (SPERC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
2. Institut für Angewandte Photophysik (IAPP); Technische Universität Dresden; George-Bähr-Straße 1 01069 Dresden Germany
3. Novaled GmbH; Tatzberg 49 01307 Dresden Germany
4. Department of Physics; Kent State University; Kent OH 44242 USA