Title: ZnO nanostructures assisted growth using different NH4F concentrations for photovoltaic applications

Authors: A. Muhammad; Z. Hassan; Sabah M. Mohammad; Suvindraj Rajamanickam

Addresses: Institute of Nano Optoelectronics Research and Technology (INOR), Universiti Sains Malaysia, 11800 Penang, Malaysia; Department of Physics, Sule Lamido University Kafin-Hausa, P.M. B 0048, Jigawa State, Nigeria ' Institute of Nano Optoelectronics Research and Technology (INOR), Universiti Sains Malaysia, 11800 Penang, Malaysia ' Institute of Nano Optoelectronics Research and Technology (INOR), Universiti Sains Malaysia, 11800 Penang, Malaysia ' Institute of Nano Optoelectronics Research and Technology (INOR), Universiti Sains Malaysia, 11800 Penang, Malaysia

Abstract: In this study, different morphologies of ZnO nanostructures (NSs) were synthesised by adding ammonium fluoride (NH4F) at different concentrations using the hydrothermal method for the exploration of photovoltaic applications. Morphology varies from well-aligned hexagonal nanorods (NRs) to nanoflakes (NFLs) and nanoflowers (NFs) are observed and revealed by field emission scanning microscopy (FESEM). X-ray diffraction spectrum (XRD) analysis confirmed good crystal quality of ZnO nanostructures (NSs) along (002). Ultraviolet-visible (UV-Vis) analysis confirmed strong reflection suppression in the ultraviolet-near infrared (UV-NIR) range, giving a high green signal for solar cell applications. Finally, photoluminescence (PL) emission has shown both strong near band edge (NBE) and deep level emission (DLE) peaks indicating a promising signal for different applications such as for photosensors and photocatalytic activity. Lastly, a fast and sensitive photodetector (PD) based on 0F and 3F samples was fabricated with promising performance.

Keywords: ZnO; ammonium fluoride; nanostructures; FESEM; photovoltaic; photodetector; hydrothermal method.

DOI: 10.1504/IJNT.2022.124493

International Journal of Nanotechnology, 2022 Vol.19 No.2/3/4/5, pp.97 - 112

Published online: 27 Jul 2022 *

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