1. Faculty of Science Yamagata University 1-4-12 Kojirakawa-machi Yamagata 990-8560 Japan
2. Graduate School of Science and Engineering Yamagata University 4-3-16 Jonan Yonezawa Yamagata 992-8510 Japan
3. Department of Physics and Materials Science Program The University of Vermont Burlington VT 05405 USA
4. Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan
5. Linz Institute for Organic Solar Cells (LIOS) Physical Chemistry Johannes Kepler University Linz Altenbergerstraße 69 Linz 4040 Austria