1. Advanced Research Division, Materials Research Laboratory Panasonic Corporation 1006 Kadoma Kadoma City Osaka 571-8501 Japan
2. Department of Organic Chemistry Kaunas University of Technology, 19 Kaunas 50254 Lithuania
3. Laboratory for Photonics and Interfaces Institute of Chemical Sciences and Engineering Ecole Polytechnique Federale de Lausanne 1015 Lausanne Switzerland
4. Group for Molecular Engineering of Functional Materials Institute of Chemical Sciences and Engineering École Polytechnique Fédérale de Lausanne Sion CH-1951 Switzerland
5. Laboratory of Photomolecular Science Institute of Chemical Sciences and Engineering Ecole Polytechnique Federale de Lausanne 1015 Lausanne Switzerland