Graphene Oxide Concentration Effect on the Optoelectronic Properties of ZnO/GO Nanocomposites

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ID: 111374
2020
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Abstract
In this work, the effects of graphene oxide (GO) concentrations (1.5 wt.%, 2.5 wt.%, and 5 wt.%) on the structural, morphological, optical, and luminescence properties of zinc oxide nanorods (ZnO NRs)/GO nanocomposites, synthesized by a facile hydrothermal process, were investigated. X-ray diffraction (XRD) patterns of NRs revealed the hexagonal wurtzite structure for all composites with an average coherence length of about 40–60 nm. A scanning electron microscopy (SEM) study confirmed the presence of transparent and wrinkled, dense GO nanosheets among flower-like ZnO nanorods, depending on the GO amounts used in preparation. Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), ultraviolet–visible (UV–Vis) absorption spectroscopy, and photoluminescence (PL) measurements revealed the impact of GO concentration on the optical and luminescence properties of ZnO NRs/GO nanocomposites. The energy band gap of the ZnO nanorods was independent of GO concentration. Photoluminescence spectra of nanocomposites showed a significant decrease in the intensities in the visible light range and red shifted suggesting a charge transfer process. The nanocomposites’ chromaticity coordinates for CIE 1931 color space were estimated to be (0.33, 0.34), close to pure white ones. The obtained results highlight the possibility of using these nanocomposites to achieve good performance and suitability for optoelectronic applications.
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boukhoubza2020nanomaterialsgraphene Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Issam Boukhoubza;Mohammed Khenfouch;Mohamed Achehboune;Liviu Leontie;Aurelian Catalin Galca;Monica Enculescu;Aurelian Carlescu;Mohammed Guerboub;Bakang Moses Mothudi;Anouar Jorio;Izeddine Zorkani;Boukhoubza, Issam;Khenfouch, Mohammed;Achehboune, Mohamed;Leontie, Liviu;Galca, Aurelian Catalin;Enculescu, Monica;Carlescu, Aurelian;Guerboub, Mohammed;Mothudi, Bakang Moses;Jorio, Anouar;Zorkani, Izeddine;
Journal Nanomaterials
Year 2020
DOI
10.3390/nano10081532
URL
https://www.mdpi.com/2079-4991/10/8/1532
Keywords
hydrothermal method zno nrs/go nanocomposites cie diagram optoelectronic properties National Center for Biotechnology Information NCBI NLM MEDLINE pubmed abstract nih national institutes of health national library of medicine pmid:32764216 pmc7466397 doi:10.3390/nano10081532 issam boukhoubza mohammed khenfouch izeddine zorkani

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