1. Research
Center for Advanced Science and Technology, The University of Tokyo, Tokyo 153-8904, Japan
2. Global
Solar plus Initiative, The University of Tokyo, Tokyo 153-8904, Japan
3. Department
of Electrical Engineering and Information Systems, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
4. School
of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan RD, Shanghai 200240, China