1. Department of Electronic and Electrical Engineering, University of Sheffield, Mappin St, Sheffield, S1 3JD, UK
2. Department of Chemistry, Durham University, South Road, Durham, DH1 3LE, UK
3. Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
4. Faculty of Chemistry, Silesian University of Technology, M. Strzody 9, 44-100 Gliwice, Poland
5. Centre for Organic and Nanohybrid Electronics, Silesian University of Technology, Konarskiego 22B, 44-100 Gliwice, Poland