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Plasmonic fractals: Ultrabroadband light trapping in thin film solar cells by a Sierpinski nanocarpet

Kazerooni, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1007/s11082-013-9783-0
  3. Abstract:
  4. Plasmonic Sierpinski nanocarpet as back structure for a thin film Si solar cell is investigated. We demonstrate that ultra-broadband light trapping can be obtained by placing square metallic nanoridges with Sierpinski pattern on the back contact of the thin film solar cell. The multiple-scale plasmonic fractal structure allows excitation of localized surface plasmons and surface plasmon polaritons in multiple wavelengths leading to obvious absorption enhancements in a wide frequency range. Full wave simulations show that 109 % increase of the short-circuit current density for a 200 nm thick solar cell, is achievable by the proposed fractal back structure. The amount of light absorbed in the active region of this cell is more than that of a flat cell with semiconductor thickness of 1,000 nm
  5. Keywords:
  6. Light trapping ; Thin film photovoltaic ; Electromagnetic wave polarization ; Fractals ; Silicon solar cells ; Thin films ; Absorption enhancement ; Localized surface plasmon ; Photovoltaic ; Plasmonics ; Semiconductor thickness ; Surface plasmon polaritons ; Thin-film si solar cells ; Plasmons
  7. Source: Optical and Quantum Electronics ; Vol. 46, issue. 6 , 2014 , pp. 751-757 ; ISSN: 03068919
  8. URL: http://link.springer.com/article/10.1007%2Fs11082-013-9783-0