Affiliation: | 1. Department of Physics and Astronomy, University of Bologna, Bologna, 40127 Italy;2. Department of Physics, Faculty of Science, University of Zagreb, Bijenička c. 32, Zagreb, 10000 Croatia;3. Laboratory of Organic Electronics, ITN Campus Norrköping, Linköping University, Norrköping, SE-60174 Sweden Central European Institute of Technology, Brno University of Technology, Purkynova 123, Brno, 61200 Czech Republic |