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San Román E, Vitrey A, Buencuerpo J, et al. Cloaking of solar cell contacts at the onset of Rayleigh scattering. Sci Rep. 2016;6:28669doi: 10.1038/srep28669.
San Román, E., Vitrey, A., Buencuerpo, J., Prieto, I., Llorens, J. M., García-Martín, A., Alén, B., Chaudhuri, A., Neumann, A., Brueck, S. R., & Ripalda, J. M. (2016). Cloaking of solar cell contacts at the onset of Rayleigh scattering. Scientific reports, 628669. https://doi.org/10.1038/srep28669
San Román, Etor, et al. "Cloaking of solar cell contacts at the onset of Rayleigh scattering." Scientific reports vol. 6 (2016): 28669. doi: https://doi.org/10.1038/srep28669
San Román E, Vitrey A, Buencuerpo J, Prieto I, Llorens JM, García-Martín A, Alén B, Chaudhuri A, Neumann A, Brueck SR, Ripalda JM. Cloaking of solar cell contacts at the onset of Rayleigh scattering. Sci Rep. 2016 Jun 24;6:28669. doi: 10.1038/srep28669. PMID: 27339390; PMCID: PMC4919638.
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Sci Rep. 2016 Jun 24;6:28669. doi: 10.1038/srep28669.

Cloaking of solar cell contacts at the onset of Rayleigh scattering.

Scientific reports

Etor San Román, Alan Vitrey, Jerónimo Buencuerpo, Iván Prieto, José M Llorens, Antonio García-Martín, Benito Alén, Anabil Chaudhuri, Alexander Neumann, S R J Brueck, José M Ripalda

Affiliations

  1. IMM-Instituto de Microelectrónica de Madrid (CNM-CSIC), Isaac Newton 8, PTM, E-28760 Tres Cantos, Madrid, Spain.
  2. Center for High Technology Materials, University of New Mexico, Albuquerque, NM 87106, USA.

PMID: 27339390 PMCID: PMC4919638 DOI: 10.1038/srep28669

Abstract

Electrical contacts on the top surface of solar cells and light emitting diodes cause shadow losses. The phenomenon of extraordinary optical transmission through arrays of subwavelength holes suggests the possibility of engineering such contacts to reduce the shadow using plasmonics, but resonance effects occur only at specific wavelengths. Here we describe instead a broadband effect of enhanced light transmission through arrays of subwavelength metallic wires, due to the fact that, in the absence of resonances, metal wires asymptotically tend to invisibility in the small size limit regardless of the fraction of the device area taken up by the contacts. The effect occurs for wires more than an order of magnitude thicker than the transparency limit for metal thin films. Finite difference in time domain calculations predict that it is possible to have high cloaking efficiencies in a broadband wavelength range, and we experimentally demonstrate contact shadow losses less than half of the geometric shadow.

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