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Enhanced light absorption in thin-film solar cells with light propagation direction conversion

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Title: Enhanced light absorption in thin-film solar cells with light propagation direction conversion
Authors: Suemune, Ikuo Browse this author →KAKEN DB
Keywords: Diffraction gratings
Solar energy
Issue Date: 25-Apr-2013
Publisher: Optical Society of America
Journal Title: Optics Express
Volume: 21
Issue: S3
Start Page: A539
End Page: A547
Publisher DOI: 10.1364/OE.21.00A539
Abstract: Enhancement of optical absorption in thin-film solar cells (TF-SCs) has been the long-lasting issue to achieve high efficiencies. Grating couplers have been studied for the conversion of incident light into guided modes propagating along TF-SCs to extend optical path for higher optical absorption. However the wavelength band for the efficient conversion remained relatively narrow and the overall improvement of TF-SC efficiencies has been limited. This paper demonstrates that the grating height design as well as the phase matching condition is important for the enhancement of optical absorption in TF-SCs with the calculation of short-circuit currents as a figure of merit for optimization. The influence of the light absorption coefficients and grating coupling strengths on the light absorption bandwidth is also discussed.
Rights: © 2013 Optical Society of America, Inc.
Type: article
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 末宗 幾夫

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