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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 22, Iss. S4 — Jun. 30, 2014
  • pp: A1145–A1152

Embedding metal electrodes in thick active layers for ITO-free plasmonic organic solar cells with improved performance

Sangjun Lee, Daniel R. Mason, Sungjun In, and Namkyoo Park  »View Author Affiliations

Optics Express, Vol. 22, Issue S4, pp. A1145-A1152 (2014)

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We propose and numerically investigate the optical performance of a novel plasmonic organic solar cell with metallic nanowire electrodes embedded within the active layer. A significant improvement (~15%) in optical absorption over both a conventional ITO organic solar cell and a conventional plasmonic organic solar cell with top-loaded metallic grating is predicted in the proposed structure. Optimal positioning of the embedded metal electrodes (EME) is shown to preserve the condition for their strong plasmonic coupling with the metallic back-plane, meanwhile halving the hole path length to the anode which allows for a thicker active layer that increases the optical path length of propagating modes. With a smaller sheet resistance than a typical 100 nm thick ITO film transparent electrode, and an increased optical absorption and hole collection efficiency, our EME scheme could be an excellent alternative to ITO organic solar cells.

© 2014 Optical Society of America

OCIS Codes
(040.5350) Detectors : Photovoltaic
(310.6860) Thin films : Thin films, optical properties
(350.6050) Other areas of optics : Solar energy
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Light Trapping for Photovoltaics

Original Manuscript: April 22, 2014
Revised Manuscript: May 24, 2014
Manuscript Accepted: May 27, 2014
Published: June 10, 2014

Sangjun Lee, Daniel R. Mason, Sungjun In, and Namkyoo Park, "Embedding metal electrodes in thick active layers for ITO-free plasmonic organic solar cells with improved performance," Opt. Express 22, A1145-A1152 (2014)

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