Japanese programs on novel concepts in PV
Masafumi YamaguchiToyota Technological Institute, 2-12 Hisakata, Tempaku, Nagoya, 468-8511, JapanTatsuya TakamotoSharp Corporation, Hajikami, Shinjo, Nara, 639-2198, JapanKenji ArakiDaido Steel Corporation, Daido-cho, Minami, Nagoya, 457-8545, JapanMitsuru ImaizumiNASDA, Sengen, Tsukuba, Ibaraki, 305-8505, Japan
2004en
ABI
Annotatsiya
Japanese R&D activities in photovoltaics (PV) and our R&D activities with III-V compound multijunction (MJ) solar cells are presented. We have realized high-efficiency InGaP/InGaAs triple-junction solar cells with an efficiency of 36.5–37% (AM1.5G, 200 suns) and concentrator triple-junction solar cell modules with an outdoor efficiency of 27% as a result of designing a grid structure, developing low optical loss Fresnel lens and homogenizers, and designing low thermal conductivity modules. Our challenge now is to develop low-cost and high output power concentrator MJ solar cell modules with an output power of 400 W/m2 for terrestrial applications.
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