Nanostructured biomimetic moth-eye arrays in silicon by nanoimprint lithography


Boden, S.A. and Bagnall, D.M. (2009) Nanostructured biomimetic moth-eye arrays in silicon by nanoimprint lithography. In, SPIE Optics and Photonics 2009, San Diego, SPIE, 74010J-1-74010J-12.

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Description/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.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Event Dates: 2/8/2009
Divisions: Faculty of Physical Sciences and Engineering > Electronics and Computer Science > NANO
ePrint ID: 267800
Date Deposited: 25 Aug 2009 14:22
Last Modified: 27 Mar 2014 20:14
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/267800

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