The article by Jia Zhu et al. demonstrates the fabrication and optical properties of hydrogenated amorphous silicon (a-Si:H) nanowires (NWs) and nanocones (NCs) using a scalable and IC-compatible process. The authors investigate the light absorption and reflection properties of these nanostructures, particularly their enhanced absorption over a wide range of wavelengths and angles of incidence due to suppressed reflection. The a-Si:H NC arrays show significantly better performance compared to NW arrays and thin films, with over 90% light absorption at angles up to 60° and 88% absorption at the band gap edge. The enhanced absorption is attributed to the graded reduction of the effective refractive index, which provides nearly perfect impedance matching between a-Si:H and air. The experimental results are well supported by simulations, highlighting the potential of a-Si:H NC arrays for improving the energy conversion efficiency in solar cells.The article by Jia Zhu et al. demonstrates the fabrication and optical properties of hydrogenated amorphous silicon (a-Si:H) nanowires (NWs) and nanocones (NCs) using a scalable and IC-compatible process. The authors investigate the light absorption and reflection properties of these nanostructures, particularly their enhanced absorption over a wide range of wavelengths and angles of incidence due to suppressed reflection. The a-Si:H NC arrays show significantly better performance compared to NW arrays and thin films, with over 90% light absorption at angles up to 60° and 88% absorption at the band gap edge. The enhanced absorption is attributed to the graded reduction of the effective refractive index, which provides nearly perfect impedance matching between a-Si:H and air. The experimental results are well supported by simulations, highlighting the potential of a-Si:H NC arrays for improving the energy conversion efficiency in solar cells.