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Energy Express

  • Editor: Bernard Kippelen
  • Vol. 18, Iss. S2 — Jun. 21, 2010
  • pp: A237–A245

Light trapping in ultrathin plasmonic solar cells

Vivian E. Ferry, Marc A. Verschuuren, Hongbo B. T. Li, Ewold Verhagen, Robert J. Walters, Ruud E. I. Schropp, Harry A. Atwater, and Albert Polman  »View Author Affiliations

Optics Express, Vol. 18, Issue S2, pp. A237-A245 (2010)

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We report on the design, fabrication, and measurement of ultrathin film a-Si:H solar cells with nanostructured plasmonic back contacts, which demonstrate enhanced short circuit current densities compared to cells having flat or randomly textured back contacts. The primary photocurrent enhancement occurs in the spectral range from 550 nm to 800 nm. We use angle-resolved photocurrent spectroscopy to confirm that the enhanced absorption is due to coupling to guided modes supported by the cell. Full-field electromagnetic simulation of the absorption in the active a-Si:H layer agrees well with the experimental results. Furthermore, the nanopatterns were fabricated via an inexpensive, scalable, and precise nanopatterning method. These results should guide design of optimized, non-random nanostructured back reflectors for thin film solar cells.

© 2010 OSA

OCIS Codes
(350.6050) Other areas of optics : Solar energy
(250.5403) Optoelectronics : Plasmonics

ToC Category:

Original Manuscript: May 12, 2010
Revised Manuscript: June 7, 2010
Manuscript Accepted: June 8, 2010
Published: June 11, 2010

Vivian E. Ferry, Marc A. Verschuuren, Hongbo B. T. Li, Ewold Verhagen, Robert J. Walters, Ruud E. I. Schropp, Harry A. Atwater, and Albert Polman, "Light trapping in ultrathin plasmonic solar cells," Opt. Express 18, A237-A245 (2010)

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