Ultrathin III–V solar cells are sought after for their relatively low cost and potential novel applications such as hot-carrier solar cells, but currently suffer from low power-conversion efficiency. Now, light-trapping nanostructures have been demonstrated to enable efficiency of 19.9% in a 205-nm-thick GaAs solar cell.
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Hirst, L. Ever thinner high-efficiency cells. Nat Energy 4, 726–727 (2019). https://doi.org/10.1038/s41560-019-0444-9
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DOI: https://doi.org/10.1038/s41560-019-0444-9
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Simulation of photon recycling in ultra-thin solar cells
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