1. Molecular Materials and Nanosystems, Eindhoven University of Technology, P.O. Box 513, 5600
MB Eindhoven, The Netherlands
2. Holst Centre/TNO, High Tech Campus 31,
5656 AE Eindhoven, The Netherlands
3. Organic Electronic Materials Basel, BASF Schweiz AG, Schwarzwaldallee 215, 4002 Basel,
Switzerland