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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 22, Iss. S5 — Aug. 25, 2014
  • pp: A1292–A1302

Broadband absorption enhancement in elliptical silicon nanowire arrays for photovoltaic applications

Yonggang Wu, Zihuan Xia, Zhaoming Liang, Jian Zhou, Hongfei Jiao, Hong Cao, and Xuefei Qin  »View Author Affiliations

Optics Express, Vol. 22, Issue S5, pp. A1292-A1302 (2014)

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Semiconducting nanowire arrays have emerged as a promising route toward achieving high efficiencies in solar cells. Here we propose a perpendicular elliptical silicon nanowire (PEE-SiNW) array for broadband light absorption in thin film silicon solar cells. Simulation results reveal that light absorption enhancement is originated from the split of the principal modes as well as the excitation of high order modes caused by the asymmetry of the elliptical nanowires and the enhanced mode coupling between adjacent elliptical nanowires attained by the appropriate arrangement of nanowires. An ultimate efficiency of 29.1% is achieved for the optimal PEE-SiNW array, which is 16.4% higher than that of the circular SiNW array with the same fill fraction.

© 2014 Optical Society of America

OCIS Codes
(040.5350) Detectors : Photovoltaic
(040.6040) Detectors : Silicon
(130.2790) Integrated optics : Guided waves
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:

Original Manuscript: June 4, 2014
Revised Manuscript: July 18, 2014
Manuscript Accepted: July 28, 2014
Published: August 7, 2014

Yonggang Wu, Zihuan Xia, Zhaoming Liang, Jian Zhou, Hongfei Jiao, Hong Cao, and Xuefei Qin, "Broadband absorption enhancement in elliptical silicon nanowire arrays for photovoltaic applications," Opt. Express 22, A1292-A1302 (2014)

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