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III-V

Fraunhofer ISE achieves 35.9% efficiency for III-V triple-junction solar cell based on silicon

The cell, which looks externally like a device with a two-terminal architecture, was built with III-V semiconductor layers that were connected to the silicon sub-cell on the atomic level. The cell may be used in electrically powered aircraft and drones.

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New approach to III-V tandems sets 32.9% efficiency record

A collaboration between the U.S. National Renewable Energy Laboratory and Australia’s University of New South Wales has yielded a new efficiency record of 32.9% for a tandem cell device utilizing III-V materials. Key to the achievement was a new technique enabling the researchers to take advantage of “quantum wells” in the material that serve to trap charges and enable tuning of the cell bandgap to absorb more of the light spectrum.

Space age solar solution moves toward production

A consortium of European research institutes has received €10.6 million in EU funding to establish pilot production of a high efficiency module concept developed by Swiss startup Insolight. The module combines high efficiency multijunction cells with a solar concentrator lens and has previously demonstrated 29% efficiency.

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Fraunhofer ISE achieves 34.1% efficiency with triple junction cell

Scientists at Germany’s Fraunhofer Institute for Solar Energy Systems have broken two of their own records for cell efficiency, working with silicon and III-V material tandem cells. The institute hit 34.1% on a triple junction cell using wafer bonding technology and 24.3% by directly depositing III-V layers onto a silicon solar cell.

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Nothing can bring down the price of III-V solar cells – just add germanium

A research paper from scientists at the U.S. National Renewable Energy Laboratory outlines a new approach to the production of gallium arsenide based cells. The approach, termed ‘germanium on nothing’, could enable the cost effective, high volume production of PV cells based on III-V materials such as gallium arsenide.

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NREL develops new process to bring ‘Mars Rover’ PV cells down to earth

The U.S. National Renewable Energy Laboratory has developed a process which it says can dramatically reduce the costs of producing ultra-high efficiency cells from gallium arsenide, and other III-V compounds, similar to the solar cells used by NASA in space exploration projects.

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