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Proceedings Article

Nanostructured biomimetic moth-eye arrays in silicon by nanoimprint lithography

[+] Author Affiliations
Stuart A. Boden, Darren M. Bagnall

Univ. of Southampton (United Kingdom)

Proc. SPIE 7401, Biomimetics and Bioinspiration, 74010J (August 21, 2009); doi:10.1117/12.826201
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From Conference Volume 7401

  • Biomimetics and Bioinspiration
  • Raul J. Martin-Palma; Akhlesh Lakhtakia
  • San Diego, CA | August 02, 2009

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.

© (2009) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Stuart A. Boden and Darren M. Bagnall
"Nanostructured biomimetic moth-eye arrays in silicon by nanoimprint lithography", Proc. SPIE 7401, Biomimetics and Bioinspiration, 74010J (August 21, 2009); doi:10.1117/12.826201; http://dx.doi.org/10.1117/12.826201


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