Al Doping Influence on the Properties of Sol–Gel Synthetized ZnO Nanoparticles

Author:

Al-Shehri Samar1,Alshehri Salma1,Ali Haithem Elhosni23,Alassafi Jamaan Eidhah1,Alzahrani Ahmed Obaid M.1,Aida Mohammed Salah1ORCID

Affiliation:

1. Physics Department Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia

2. Physics Department Faculty of Science King Khalid University P.O. Box 9004 Abha Saudi Arabia

3. Physics Department Faculty of Science Zagazig University Zagazig 44519 Egypt

Abstract

Herein, zinc oxide (ZnO) nanocrystalline powders with different aluminum (Al) concentrations (from 0 to 4 wt%) have been successfully synthesized via sol–gel technique. The structure and morphology of the Al‐doped ZnO (AZO) nanoparticles are investigated using X‐ray powder diffraction (XRD) and scanning electron microscopy. The XRD results reveal the reduction in the crystallite size with increasing the Al doping ratio. ZnO phase is observed in all samples with no extra peaks. In addition, UV–vis diffuse reflectance spectroscopy is used to study the effect of Al dopant on the ZnO nanopowder optical properties. it is concluded that increasing Al concentration leads to decrease in energy gap (Eg) value from 3.30 eV (for undoped ZnO) to 3.25 eV (for AZO with highest concentration, 4 wt%). Finally, according to the obtained results, the ability to tune the bandgap of the prepared samples makes them superior candidates for using in various applications, especially optoelectronic devices.

Publisher

Wiley

Subject

Materials Chemistry,Electrical and Electronic Engineering,Surfaces, Coatings and Films,Surfaces and Interfaces,Condensed Matter Physics,Electronic, Optical and Magnetic Materials

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