1. The Organic Photonics and Electronics Group; Umeå University; SE-901 87 Umeå Sweden
2. LunaLEC; Tvistevägen 47, PO Box 7970 SE-907 19 Umeå Sweden
3. Center for Functional Materials; Åbo Akademi University; FI-20500 Turku Finland
4. Omya International AG; Baslerstrasse 42 CH-4665 Oftringen Switzerland