1. Faculty of Chemistry, Silesian University of Technology, Strzody 9, 44-100 Gliwice, Poland
2. Centre for Organic and Nanohybrid Electronics, Silesian University of Technology, Konarskiego 22B, 44-100 Gliwice, Poland
3. Department of Applied Sciences, Faculty of Health and Life Sciences, Northumbria University, Newcastle Upon Tyne NE1 8ST, Tyne and Wear, U.K.
4. Department of Physics, Durham University, South Road, Durham DH1 3LE, U.K.
5. Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS, U.K.