Special Section on Nanostructured Thin Films: Evolving Perspectives

Broadband absorption enhancement in ultrathin-film solar cells by combining dielectric nanogratings and metallic nanoribbons

[+] Author Affiliations
Fangwang Gou

Peking University, School of Electronic and Computer Engineering, Shenzhen 518055, China

Xian Li

Peking University, School of Electronic and Computer Engineering, Shenzhen 518055, China

Ji Chen

Peking University, School of Electronic and Computer Engineering, Shenzhen 518055, China

Guangyao Su

Peking University, School of Electronic and Computer Engineering, Shenzhen 518055, China

Chuanhong Liu

Peking University, School of Electronic and Computer Engineering, Shenzhen 518055, China

Zhaoyu Zhang

Peking University, School of Electronic and Computer Engineering, Shenzhen 518055, China

J. Nanophoton. 9(1), 093596 (Feb 04, 2015). doi:10.1117/1.JNP.9.093596
History: Received October 8, 2014; Accepted January 13, 2015
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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.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Fangwang Gou ; Xian Li ; Ji Chen ; Guangyao Su ; Chuanhong Liu, et al.
"Broadband absorption enhancement in ultrathin-film solar cells by combining dielectric nanogratings and metallic nanoribbons", J. Nanophoton. 9(1), 093596 (Feb 04, 2015). ; http://dx.doi.org/10.1117/1.JNP.9.093596


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