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We report a systematic and reliable approach to fabricate ZnO nanocone or nanoneedle arrays on various substrates including fibers. Our approach employs wet chemical etching of ZnO nanowire arrays using an aqueous solution of HCl. Using this simple chemical etching technique, nanowire arrays were transformed to nanocone arrays on Si substrates and Kevlar fibers. Significant enhancement of light emission...
Novel ZnO nanocone anti‐reflective coating (ARC) was realized on ITO‐Si metal–insulator–semiconductor (MIS) photodetector. The ZnO nanocone‐coated device demonstrated significant suppression of reflectance compared with that of a conventional planar device. The ZnO nanocone MIS photodetector showed a 15% enhanced external quantum efficiency (EQE) compared to a planar MIS photodetector, and indicated...
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