| 講演内容 |
This paper overviews PV R&D projects in Japan as the Project Leader of the Project “High Performance Photovoltaic System Technology Development for the Future” under the NEDO and the Research Supervisor of the Research Area “Creative Clean Energy Generation by using Solar Energy” under the JST. Most recently, world-record and second highest efficiencies of various types of solar cells have been demonstrated under the NEDO Project: 1) 44.4% (under concentration) and 37.9% (under 1-sun) InGaP/GaAs/InGaAs inverted metamorphic 3-junction solar cells by Sharp, 25.1% single crystalline Si Hetero-junction Back-Contact (HBC) solar cell by Sharp (independently, 25.6% single crystalline Si HBC solar cells by Panasonic), 20.9% CIGS solar cell by Solar Frontier, μc-Si thin-film single junction solar cell with stabilized efficiency of 11.77% and a-Si/μc-Si/μc-Si thin-film triple-junction solar cell with stabilized efficiency of 13.73% by AIST, 11.9% dye-sensitized solar cell by Sharp and 11.2% organic solar cell by Toshiba. Further improvements in performance, cost and reliability for various types of solar cells are expected. Future prospects of photovoltaics are also discussed. |
