1. Department of Molecular Physics, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
2. Bioelectronics Materials and Devices Laboratory, Central European Institute of Technology CEITEC, Brno University of Technology, Purkynova 123, 61200 Brno, Czech Republic
3. Department of Chemistry and Nanomaterials Science, Bohdan Khmelnytsky National University, 18031 Cherkasy, Ukraine
4. Faculty of Chemistry, Silesian University of Technology, Strzody 9, 44-100 Gliwice, Poland
5. Centre for Organic and Nanohybrid Electronics, Silesian University of Technology, Konarskiego 22B, 44-100 Gliwice, Poland
6. Department of Physics, Durham University, South Road, Durham DH1 3LE, United Kingdom
7. Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-60174 Norrköping, Sweden