Light Trapping for Thin-Film Silicon Solar Cells Fabricated on Insulator

We have developed a new solar cell using thin-film silicon supported by a silicon substrate etched in a grid form. The light-trapping structures of this cell have been studied by considering rear surface light reflections, electrical power loss and mechanical strength. High rear reflectance can be o...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1994, Vol.33 (6R), p.3389-3392
Main Authors: Sasaki, Hajime, Morikawa, Hiroaki, Matsuno, Yoshinori, Deguchi, Mikio, Ishihara, Takashi, Kumabe, Hisao, Murotani, Toshio, Shigeru Mitsui, Shigeru Mitsui
Format: Article
Language:English
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Summary:We have developed a new solar cell using thin-film silicon supported by a silicon substrate etched in a grid form. The light-trapping structures of this cell have been studied by considering rear surface light reflections, electrical power loss and mechanical strength. High rear reflectance can be obtained by employing a multi-layer rear electrode. The pattern of the rear substrate is designed to provide sufficient mechanical strength and to minimize the electrical power loss, taking account of the current flow path. A conversion efficiency of 14.2% for a practical size of 10×10 cm 2 is obtained by applying these calculated parameters using a single-crystal silicon substrate.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.33.3389