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

被引：56

作者：

Boukhoubza, Issam ^{[1
,2
]}

Khenfouch, Mohammed ^{[2
]}

Achehboune, Mohamed ^{[1
,2
]}

Leontie, Liviu ^{[3
]}

Galca, Aurelian Catalin ^{[4
]}

Enculescu, Monica ^{[4
]}

Carlescu, Aurelian ^{[5
]}

Guerboub, Mohammed ^{[1
]}

Mothudi, Bakang Moses ^{[6
]}

Jorio, Anouar ^{[1
]}

Zorkani, Izeddine ^{[1
]}

机构：

[1] Sidi Mohammed Ben Abdellah Univ, Fac Sci Dhar el Mahraz, Lab Solid State Phys, Grp Nanomat & Renewable Energies, POB 1796, Atlas Fez 30000, Morocco

[2] Univ South Africa, Coll Sci Engn & Technol, Dept Phys, Africa Graphene Ctr, Sci Campus,Cnr Christiaan de Wet & Pioneer Ave, ZA-1709 Johannesburg, South Africa

[3] Alexandru Ioan Cuza Univ, Fac Phys, Bulevardul Carol I 11, Iasi 700506, Romania

[4] Natl Inst Mat Phys, Lab Multifunct Mat & Struct, Atomistilor 405A, Magurele 077125, Romania

[5] Alexandru Ioan Cuza Univ, Integrated Ctr Studies Environm Sci North East Re, Bulevardul Carol I 11, Iasi 700506, Romania

[6] Univ South Africa, Dept Phys, Private Bag X90, ZA-1710 Florida, South Africa

来源：

NANOMATERIALS | 2020年 / 10卷 / 08期

关键词：

ZnO NRs; GO nanocomposites; hydrothermal method; CIE diagram; optoelectronic properties; ZINC-OXIDE; THIN-FILMS; NANOPARTICLES; PHOTOLUMINESCENCE; NANOSTRUCTURES; COMPOSITES; SEPARATION; NANORODS; SHEETS; GROWTH;

D O I：

10.3390/nano10081532

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：1 / 16

页数：16

共 48 条

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