An international research group has utilized a new porosification technique to build gallium arsenide (GaAs) solar cells that allow the recovery of germanium films. The new cell achieved an efficiency that is reportedly in line with that of other GaAs PV devices, but can be produced at a lower cost thanks to the reuse of germanium.
The EU-funded Nextbase project aims to manufacture heterojunction, interdigitated back-contact solar modules for less than €0.275/W. Solar panels featuring the Nextbase cell tech are expected to have a conversion efficiency of 23.2%, according to the European Commission.
Belgian research institute Imec has achieved a conversion efficiency of 23.9% on a perovskite/silicon tandem module measuring 4 square centimeters. This efficiency level, according to Imec, represents the first time such a stacked configuration has outperformed a standalone silicon solar cell.
The U.S. distributed solar installer has partnered with Belgium’s Electrabel to begin installing rooftop solar panels across the country.
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