Figure 5.

Efficiency Enhancements Anticipated with the Photonic Structures Analyzed in the Results Section, Taken to be Equal to the Photocurrent Density (J_PH) Enhancements Relative to the Optimized ARC case (see Table 1)

The horizontal dashed lines mark the enhancements attained for the theoretical Lambertian cases (row 6 of Table 1), considering the 100-nm a-Si (orange line), 300-nm a-Si (green), and 1.5-μm c-Si (blue) absorber layers. The Lambertian enhancement values are determined with the J_PH values in row 6 of Table 1, relative to the J_PH of the corresponding structures without light trapping, in the geometrical optics regime, given in the supplemental material of a previous contribution by Mendes et al. (2016).