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