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Energy Express

Energy Express

  • Editor: Bernard Kippelen
  • Vol. 20, Iss. S3 — May. 7, 2012
  • pp: A412–A417

Nano-patterned glass superstrates with different aspect ratios for enhanced light harvesting in a-Si:H thin film solar cells

Ting-Gang Chen, Peichen Yu, Yu-Lin Tsai, Chang-Hong Shen, Jia-Min Shieh, Min-An Tsai, and Hao-Chung Kuo  »View Author Affiliations


Optics Express, Vol. 20, Issue S3, pp. A412-A417 (2012)
http://dx.doi.org/10.1364/OE.20.00A412


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Abstract

Nano-patterned glass superstrates obtained via a large-area production approach are desirable for antireflection and light trapping in thin-film solar cells. The tapered nanostructures allow a graded refractive index profile between the glass and material interfaces, leading to suppressed surface reflection and increased forward diffraction of light. In this work, we investigate nanostructured glass patterns with different aspect ratios using scalable nanosphere lithography for hydrogenated amorphous silicon (a-Si:H) thin film solar cells. Compared to flat glass cell and Asahi U-type glass cell, enhancements in short-circuit current density (Jsc) of 51.6% and 8%, respectively, were achieved for a moderate aspect ratio of 0.16. The measured external quantum efficiencies (EQE) spectra confirmed a broadband enhancement due to antireflection and light trapping properties.

© 2012 OSA

OCIS Codes
(040.5350) Detectors : Photovoltaic
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Photovoltaics

History
Original Manuscript: March 13, 2012
Revised Manuscript: April 5, 2012
Manuscript Accepted: April 8, 2012
Published: April 12, 2012

Citation
Ting-Gang Chen, Peichen Yu, Yu-Lin Tsai, Chang-Hong Shen, Jia-Min Shieh, Min-An Tsai, and Hao-Chung Kuo, "Nano-patterned glass superstrates with different aspect ratios for enhanced light harvesting in a-Si:H thin film solar cells," Opt. Express 20, A412-A417 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-S3-A412


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