Terrestrial deployments of III-V solar cells require cell manufacturing costs well below $10/WDC in order to gain widespread adoption for a variety of use-cases. To achieve these targets, the cost of substrates, processing, and epitaxial growth must significantly decrease from today’s levels. In this work, we present Sonic Lift-off (SLO) of operational single junction GaAs cells as an avenue to enable multiple substrate re-use for subsequent growth, with minimal re-polishing, to drive down substrate costs dramatically.
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