Alta Devices sets new dual-junction solar efficiency record at 31.6%


Alta Devices has announced its latest world record for its gallium arsenide (GaAs) solar PV technology. The company has produced a 31.6% dual-junction cell at one sun, as verified by the U.S. Department of Energy’s National Renewable Energy Laboratories (NREL).

While higher efficiencies have been achieved with concentration, Alta had set a one-sun efficiency record for dual-junction PV at 30.8% in 2013. Shortly thereafter this record was bested by NREL, however now Alta has regained the world record.

Alta Devices says that it was able to make the jump by modifying its single-junction GaAs design to include a layer of indium gallium phosphide (InGaPh), which it says utilizes high-efficiency photons more efficiently.

Alta now holds the world record for both single- and dual-junction solar PV at one sun. However, there are typically additional challenges in bringing the technology breakthroughs in research cells into mass production. Manufacturing costs are another question, and GaAs has a tiny share of the global PV market.

The company is advertising the thinness and light weight of its GaAs cells for use in unmanned aerial vehicles (“drones”), stating that its GaAs modules require less than half of the surface area and represent one quarter the weight on a per watt basis versus competing thin-film technologies.

Alta Devices also produces PV for applications including wearable technology and the Internet of Things.

This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact:

Popular content


Related content

Elsewhere on pv magazine...

Leave a Reply

Please be mindful of our community standards.

Your email address will not be published. Required fields are marked *

By submitting this form you agree to pv magazine using your data for the purposes of publishing your comment.

Your personal data will only be disclosed or otherwise transmitted to third parties for the purposes of spam filtering or if this is necessary for technical maintenance of the website. Any other transfer to third parties will not take place unless this is justified on the basis of applicable data protection regulations or if pv magazine is legally obliged to do so.

You may revoke this consent at any time with effect for the future, in which case your personal data will be deleted immediately. Otherwise, your data will be deleted if pv magazine has processed your request or the purpose of data storage is fulfilled.

Further information on data privacy can be found in our Data Protection Policy.