Optimized spatial correlations for broadband light trapping nanopatterns in high efficiency ultrathin film a-Si:H solar cells

Vivian E. Ferry, Marc A. Verschuuren, M. Claire Van Lare, Ruud E I Schropp, Harry A. Atwater, Albert Polman

Research output: Contribution to journalArticlepeer-review

311 Scopus citations

Abstract

Nanophotonic structures have attracted attention for light trapping in solar cells with the potential to manage and direct light absorption on the nanoscale. While both randomly textured and nanophotonic structures have been investigated, the relationship between photocurrent and the spatial correlations of random or designed surfaces has been unclear. Here we systematically design pseudorandom arrays of nanostructures based on their power spectral density, and correlate the spatial frequencies with measured and simulated photocurrent. The integrated cell design consists of a patterned plasmonic back reflector and a nanostructured semiconductor top interface, which gives broadband and isotropic photocurrent enhancement.

Original languageEnglish (US)
Pages (from-to)4239-4245
Number of pages7
JournalNano letters
Volume11
Issue number10
DOIs
StatePublished - Oct 12 2011

Bibliographical note

Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.

Keywords

  • Thin film solar cells
  • light trapping
  • nanoimprint lithography
  • photovoltaics
  • silicon
  • surface plasmon polariton

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