1. National Institute of Advanced Industrial Science and Technology; Research Center for Photovoltaics Technologies; AIST Tsukuba Central 2 305-8568 Tsukuba Ibaraki Japan
2. Electric Power Development Co., Ltd. (JPOWER); 104-8165 Ginza 6-15-1 Chuo-ku Tokyo Japan
3. Institute of Industrial Science (IIS), Collaborative Research Center for Energy Engineering (CEE); Tokyo University; 153-8505 Komaba 4-6-1 Meguro-ku Tokyo Japan