1. Department of Advanced Interdisciplinary Studies; The University of Tokyo; 4-6-1 Komaba, Meguro-ku Tokyo 153-8904 Japan
2. Advanced Technologies Development Center; Eco Solutions Company; Panasonic Corporation; 1048 Kadoma, Kadoma Osaka 571-8686 Japan
3. Research Center for Solar Energy Chemistry; Osaka University; 1-3 Machikaneyama, Toyonaka Osaka 560-8531 Japan
4. Japan Science and Technology Agency (JST) PRESTO; 4-1-8 Honcho, Kawaguchi Saitama 332-0012 Japan
5. National Institute for Materials Science; 1-2-1 Sengen, Tsukuba Ibaraki 305-0047 Japan