New Light Absorbing Material

  • Author: ChemistryViews
  • Published: 04 November 2011
  • Copyright: WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
  • Source / Publisher: Nature Communications
thumbnail image: New Light Absorbing Material

Researchers around Koray Aydin, Northwestern University, USA, used metal and silicon oxide to create ultrathin (260 nm) but complex, trapezoid-shaped metal gratings on the nanoscale that can trap a wider range of visible light. The uniquely shaped grating captured a wide range of wavelengths (400–700) due to the local optical resonances, causing light to spend more time inside the material until it gets absorbed. The design of nanostructured 'black' super absorbers from materials comprising only lossless dielectric materials and highly reflective noble materials represent a new research direction.

The composite metamaterial was also able to collect light from many different angles – a useful quality when dealing with sunlight, which hits solar cells at different angles as sun moves throughout the day.

Metal and silicon oxide cannot convert light to electricity. But if the innovative trapezoid shape could be replicated in semiconducting materials that could be used in solar cells. Then the technology could lead to thinner, lower-cost, and more efficient solar cells.

Article Views: 4465

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from, please contact us first for permission and consult our permission guidance prior to making your request

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH