Publication: Improved omnidirectional polarisation-insensitive optical absorption and photoelectrochemical water splitting using aperiodic and tapered slanted, kinked and straight silicon nanowires
Date
10-06-2022
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Abstract
We have experimentally demonstrated that slanted, kinked and straight silicon nanowire arrays form a broadband omnidirectional light-harvesting structure. The unique design of kinked and slanted nanowires allows them to trap more light effectively across a wide wavelength range than straight silicon nanowires (SiNWs). We report that the light absorption in slanted, kinked and straight wires is enhanced by controlling their geometrical parameters. The p-type SiNWs have less reflection than n-type SiNWs due to their larger porosity gradient structure. Aperiodic and tapered slanted, kinked and straight SiNWs are remarkably photoactive and promising low-cost materials for photoelectrochemical water splitting applications.
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Keywords
antireflection, kinked SiNWs, light trapping, photoelectrochemical water splitting, slanted SiNWs, straight SiNWs