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Calculated power conversion efficiency for square GaAs cells with (a) varying side length and three different illumination conditions assuming experimental values from dark current measurements defined in the inset and (b) varying S0 Ls for three different side lengths assuming J02B = 1.464 pA/mm2 (solid lines) and 14.64 fA/mm2 (dashed lines). Experimentally measured values for 1-mm cells are plotted using square symbols.
