1. Fullerene Engineering Group, Advanced Materials
Processing Unit, Advanced Key Technologies Division, National Institute for Materials Science, 1-1 Namiki,
Tsukuba, Ibaraki 305-0044, Japan
2. Department of Physics and Centre for Plastic Electronics, Blackett
Laboratory, Imperial College London, London
SW7 2BW, U.K.
3. ICYS, National Institute for Materials Science, 1-1 Namiki,
Tsukuba, Ibaraki 305-0044, Japan
4. CarbonPhotoScience Institute, Kita-Nakayama2-1-6,
Izumi-ku, Sendai, 981-3215, Japan
5. Photonic Device Application Group, Research Institute for Ubiquitous
Energy Devices, National Institute of Advanced Industrial Science and Technology, 1-18-31 Midorigaoka, Ikeda 563-8577,
Japan