Figure 3From: Antireflective silicon nanostructures with hydrophobicity by metal-assisted chemical etching for solar cell applicationsMeasured hemispherical reflectance spectra and estimated average height and number of structures. (a) Measured hemispherical reflectance spectra of the Si nanostructures fabricated using different HF concentrations from 4% to 25% in an aqueous solution. (b) Estimated average height and number of structures within a unit area as a function of HF concentration.Back to article page