Bifaciality allows the harvest of sunlight from both sides of a solar cell and thereby increases power output, but the efficiency of thin-film devices lags behind that of silicon counterparts. Now, researchers demonstrate a bifacial Cu(In,Ga)Se2-perovskite tandem solar cell with a 28 mW/cm2 power output under front and rear illumination.
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Edoff, M. Using both sides of the panel. Nat Energy 8, 15–16 (2023). https://doi.org/10.1038/s41560-022-01181-9