1. Fig. 3 Simulated optical properties of thin and patterned absorbers made of a-Si:H with increasing disorder magnitudes.
Simulated optical properties of thin and patterned absorbers made of a-Si:H with increasing disorder magnitudes. (A) Schematic view of the four considered geometries: “unpatterned” bare slab, ordered periodically arranged holes with a single diameter, perturbed structure of holes with periodic arrangement but varying diameters, and correlated structure with disordered hole positions and varying diameters. The ordered structure has a hole diameter of 240 nm and a period of 300 nm. The ff of all patterned configurations is set to 50.26%. The insets in the lower right corners show the 2D Fourier power spectra of the corresponding structures. (B) A Gaussian distribution with a mean hole diameter of 240 nm and a variance of 20 nm is introduced into the ordered configuration to investigate the effect of size dispersion. (C) Absorption spectra of the four simulated geometries under normal incidence for unpolarized light [(TE + TM)/2]. The IA of each geometry is reported in the legend. (D) IA of the three patterned geometries versus the AOI. The resulting IA varies from 67 to 45% for angles up to 80°.
Radwanul H. Siddique et al. Sci Adv 2017;3:e
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