1. Research Center for Sustainable
Energy and Technology, Kanazawa University, Kanazawa, Japan
2. JST-PRESTO, Japan Science and Technology Agency (JST), Saitama, Japan
3. Research Center for Photovoltaic
Technologies, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
4. Sumika Chemical Analysis Service, Ltd., Tsukuba, Japan