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Energy Express

Energy Express

  • Editor: Bernard Kippelen
  • Vol. 20, Iss. S5 — Sep. 10, 2012
  • pp: A729–A739

Plasmonic nanograting design for inverted polymer solar cells

Inho Kim, Doo Seok Jeong, Taek Seong Lee, Wook Seong Lee, and Kyeong-Seok Lee  »View Author Affiliations


Optics Express, Vol. 20, Issue S5, pp. A729-A739 (2012)
http://dx.doi.org/10.1364/OE.20.00A729


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Abstract

Plasmonic nanostructures for effective light trapping in a variety of photovoltaics have been actively studied. Metallic nanograting structures are one of promising architectures. In this study, we investigated numerically absorption enhancement mechanisms in inverted polymer photovoltaics with one dimensional Ag nanograting in backcontact. An optical spacer layer of TiO2, which also may act as an electron transport layer, was introduced between nanograting pillars. Using a finite-difference-time domain method and performing a modal analysis, we explored correlations between absorption enhancements and dimensional parameters of nanograting such as period as well as height and width. The optimal design of nanograting for effective light trapping especially near optical band gap of an active layer was discussed, and 23% of absorption enhancement in a random polarization was demonstrated numerically with the optimally designed nanograting. In addition, the beneficial role of the optical spacer in plasmonic light trapping was also discussed.

© 2012 OSA

OCIS Codes
(040.5350) Detectors : Photovoltaic
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Photovoltaics

History
Original Manuscript: July 11, 2012
Revised Manuscript: August 20, 2012
Manuscript Accepted: August 21, 2012
Published: August 24, 2012

Citation
Inho Kim, Doo Seok Jeong, Taek Seong Lee, Wook Seong Lee, and Kyeong-Seok Lee, "Plasmonic nanograting design for inverted polymer solar cells," Opt. Express 20, A729-A739 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-S5-A729


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