Nanostructured biomimetic moth-eye arrays in silicon by nanoimprint lithography

Stuart A. Boden, Darren M. Bagnall

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

17 Citations (Scopus)

Abstract

The eyes and wings of some species of moth are covered in arrays of subwavelength pillars that have been tuned over millions of years of evolution to reflect as little sunlight as possible. We are investigating ways of exploiting this to reduce reflection from the surfaces of silicon solar cells. Here, we report on the experimental realization of biomimetic antireflective moth-eye arrays in silicon using a technique based on nanoimprint lithography and dry etching. Areas of 1cm x 1cm have been patterned and analysis of reflectance measurements predicts a loss in the performance of a solar cell of only 6.5% compared to an ideal antireflective coating. This compares well with an optimized single layer Si3N4 antireflective coating, for which an 8% loss is predicted.

Original languageEnglish
Title of host publicationBiomimetics and Bioinspiration
EditorsRaul J. Martin-Palma, Akhlesh Lakhtakia
Place of PublicationBellingham, Washington
PublisherSPIE
Number of pages12
ISBN (Print)9780819476913
DOIs
Publication statusPublished - 2009
Externally publishedYes
EventBiomimetics and Bioinspiration - San Diego, CA, United States
Duration: 2 Aug 20093 Aug 2009

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume7401
ISSN (Print)0277-786X

Conference

ConferenceBiomimetics and Bioinspiration
CountryUnited States
CitySan Diego, CA
Period2/08/093/08/09

Keywords

  • antireflection
  • biomimetic
  • moth-eye
  • nanoimprint lithography
  • silicon
  • solar cells
  • texturing

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