1. Faculty
of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
2. Faculty
of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu, Fukuoka 808-0196, Japan
3. CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
4. Department
of Electrical and Electronic Engineering, Faculty of Science and Engineering, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan
5. Department
of Electrical and Electronic Engineering, Miyazaki University, 1-1 Gakuen, Kibanadai Nishi, Miyazaki 889-2192, Japan
6. Beijing
Key Laboratory of Novel Thin Film Solar Cells, State Key Laboratory
of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, P. R. China
7. Center for
Green Research on Energy and Environmental Materials, National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan
8. Global Research
Center for Environmental and Energy Based on Nanomaterials Science, National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan