A concentrator module of spherical Si solar cell |
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| Authors: | Zhengxin Liu Atsushi Masuda Takehiko Nagai Takashi Miyazaki Miwako Takano Masahiro Takano Haruyuki Yoshigahara Kazutoshi Sakai Koichi Asai Michio Kondo |
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| Affiliation: | aResearch Center for Photovoltaics, National Institute of Advanced Industrial Science and Technology (AIST), Central 2, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan;bTechno Frontier Tsukuba, Japan Gore-Tex Inc., 5-5 Tokodai, Tsukuba, Ibaraki 300-2635, Japan;cFuji Machine Manufacture Co. Ltd., 480 Tojiri, Hasama, Toyota, Aichi 470-0452, Japan |
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| Abstract: | Spherical Si solar cell, which is made up of Si spheres with a diameter of approximately 1.0 mm, is expected to be a promising candidate for low consumption of Si feedstock and simple process technology. This paper describes the formation process and the structure of a concentrator module in detail. The concentrator lens was formed by casting with ultraviolet light hardening resin. The concentration ratio was 4.4 times and the pitch between the spheres was 2.0 mm. By this module design, it was possible to realize a consumption of the Si feedstock of about 3.0 g/W. Conversion efficiencies of 11.3% from single-sphere cell, 8.5% from a 23-spheres module and 5.2% from a 105-spheres module under AM1.5, 100 mW/cm2 illumination were achieved. |
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| Keywords: | Spherical Si Solar cell Concentrator module |
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