Professor, Reseacrh Center for Advanced Sciece and Technology
In this project, we are aiming at the spread in the future of ultra-high efficiency solar cells such as III-V compound solar cells, which are currently not widely adopted but used for space applications. We will try to achieve seven yen per kWh by 2030 through developing elemental technologies for cutting manufacturing costs and power generation costs as well as improving solar cell efficiency. Specifically, we will plan to develop thin-film III-V compound solar cells with a conversion efficiency of 30% and higher. To that end, we will focus on (1) super high efficiency, (2) manufacturing equipment and process, (3) elemental technologies of the epitaxial lift-off and wafer reuse techniques for cutting manufacturing costs, and (4) elemental technologies for low-cost modules and outdoor evaluation and demonstration.
- National Institute of Advanced Industrial Science and Technology
- Sharp Corporation
- Panasonic Corporation
- Taiyo Nippon Sanso Corporation
- TAKANO Corporation
- Toyota Technological Institute
- The University of Electro-Communications
- Kobe University
- Nagoya University
- Meijo University
- University of Miyazaki
- Tokyo University of Agriculture and Technology
- Osaka City University
- Saitama University
- T. Sogabe, Y. Shoji, M. Ohba, K. Yoshida, R. Tamaki, H-F. Hong, C-H. Wu, C-T. Kuo, S. Tomić and Y. Okada, “Intermediate-band dynamics of quantum dots solar cell in concentrator photovoltaic modules”, Scientific Reports (Nature Publishing), 4, 4792 (2014).
- Yoshitaka Okada, Tomah Sogabe and Yasushi Shoji, “Intermediate Band Solar Cells”, in Advanced Concepts in Photovoltaics, edited by A. J Nozik, G. Conibeer and M. C. Beard (2014, Royal Society of Chemistry, UK).
- Y. Okada, N. J. Ekins-Daukes, T. Kita, R. Tamaki, M. Yoshida, A. Pusch, O. Hess, C. C. Phillips, D. J. Farrell, K. Yoshida, N. Ahsan, Y. Shoji, T. Sogabe and J-F. Guillemoles, “Intermediate band solar cells: Recent progress and future directions”, Applied Physics Reviews, 2, 021302 (2015).
- D. J. Farrell, H. Sodabanlu, Y. Wang, M. Sugiyama and Y. Okada, “A hot-electron thermophotonic solar cell demonstrated by thermal up-conversion of sub-bandgap photons”, Nature Communications, 6, 8685 (2015).
- Okada Yoshitaka,Ryoshi-Dotto Taiyo Denchi -Genjo to Tenbo-, Nihon Enerugi Gakkaishi,96,142 (2017).(Japanese)
- Nakano Yoshiaki, Sugiyama Masakazu, Shuko-gata Cho-Kokoritsu Taiyo Denchi -Genjo to Tenbo-, Nihon Enerugi Gakkaishi,96,137 (2017).(Japanese)
- patent application PCT/JP2015/086247