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Journal of Nanophotonics

Broadband absorption enhancement in ultrathin-film solar cells by combining dielectric nanogratings and metallic nanoribbons
Author(s): Fangwang Gou; Xian Li; Ji Chen; Guangyao Su; Chuanhong Liu; Zhaoyu Zhang
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Paper Abstract

Optical absorption improvement and cost reduction of thin-film solar cells have been long-time issues. These two aims are achieved simultaneously by combining metallic nanoribbons and dielectric gratings at the front side of ultrathin-film amorphous silicon solar cells. Surface-plasmon-polariton waves excited by the nanoribbons at the long wavelength co-operates with Uller-Zenneck waves and cavity resonances excited by the gratings at the short wavelength with little cross-effect, leading to a complementary absorption enhancement of 31% when compared to planar structure. In addition, this design exhibits wide-angle absorption as well as a high fabrication tolerance. Compared to the previous work combining different mechanisms, this design provides fewer fabrication steps and an easier approach. Moreover, the nanoribbons can be used as a transparent conducting electrode for a low-cost alternative to expensive indium tin oxide thin-film.

Paper Details

Date Published: 4 February 2015
PDF: 9 pages
J. Nanophoton. 9(1) 093596 doi: 10.1117/1.JNP.9.093596
Published in: Journal of Nanophotonics Volume 9, Issue 1
Show Author Affiliations
Fangwang Gou, Peking Univ. (China)
Xian Li, Peking Univ. (China)
Ji Chen, Peking Univ. (China)
Guangyao Su, Peking Univ. (China)
Chuanhong Liu, Peking Univ. (China)
Zhaoyu Zhang, Peking Univ. (China)

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