Follow us on
Welcome Guest! You are here: Home » Science & Technology
Artificial sunlight to test solar cell efficiency
Sunday June 1, 2014 7:08 PM, IANS

To help test solar cell properties and find ways to boost their efficiency, researchers have developed a laser-based instrument that generates artificial sunlight.

The device simulates sunlight well across a broad spectrum of visible to infrared light.

More flexible than conventional solar simulators such as xenon arc-lamps or light-emitting diodes (LEDs), the laser instrument can be focused down to a small beam spot.

"We can focus the light down to a spot less than two micrometer in diameter, despite the wide spectral content. You can not do this with sunlight," said Tasshi Dennis from National Institute of Standards and Technology (NIST) in the US.

"We then used this focused spot to scan across solar cell materials while monitoring the current the light generated," Dennis added.

This allowed scientists to create spatial maps (images) of the response of a solar cell at the micrometre level.

The instrument is based on a white light laser that uses optical-fibre amplifier technology to boost the power and a photonic crystal fibre to broaden the spectrum.

"The new simulator's capability to make rapid, accurate spectrum adjustments will help characterise the most efficient solar cells, which use multi-junction materials in which each junction is tuned to a different part of the spectrum," Dennis noted.

Share this page
Note: By posting your comments here you agree to the terms and conditions of
comments powered by Disqus
| Quick links
Contact us
Subscribe to: RSS » Facebook » Twitter » Newsletter Disclaimer | Terms of Use | Advertise with us | Link Exchange is part of the Awaz Multimedia & Publications providing World News, News Analysis and Feature Articles on Education, Health. Politics, Technology, Sports, Entertainment, Industry etc. The articles or the views displayed on this website are for public information and in no way describe the editorial views. The users are entitled to use this site subject to the terms and conditions mentioned.
© 2012 Awaz Multimedia & Publications. All rights reserved.