Alta Devices reveals details: Photon recycling leads to 28.2% efficiency in GaAs

Stealthy thin-film start-up Alta Devices presented at the IEEE Photovoltaics (PV) conference last week, revealing a few more technology details. During the conference, they revealed a champion cell efficiency of 28.2%, measured by National Renewable Energy Laboratory (NREL). This is a world-record e...

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