Facile synthesis of spray pyrolyzed ZnO/NiO nanocomposites thin films

Abstract

This study reviews ZnO, NiO, and ZnO/NiO nanocomposites thin films deposition using the Spray Pyrolysis Technique (S.P.T). The thin films were deposited onto ordinary glass substrates heated at 500 °C from aqueous solutions of zinc chloride and nickel chloride precursors dissolved in distilled water. The structural, morphological, and optical properties of the ZnO, NiO, and ZnO/NiO thin films have been studied by X-ray diffraction, scanning electron microscopy, Raman spectroscopies, and so on. The optical band gaps are 3.3 and 3.5 eV for ZnO and NiO thin films, respectively obtained by UV–Vis spectroscopy. However, the optical band gaps of ZnO/NiO nanocomposites thin films, are noticeable out of the range (3.4–3.64 eV).

GRAPHICAL ABSTRACT

Keywords:

• Thin films
• nanocomposites
• spray pyrolysis
• characterizations

Acknowledgments

Authors gratefully acknowledge the financial support of the Directorate General for Scientific Research and Technological Development (DGRSDT), authors also would like to thank Nechadi Meriem of Energetic and Solid-State Electrochemistry Laboratory (Setif-1 University), and Yacine BOUACHIBA of Thin Film and Interfaces Laboratory (Constantine-1) for the characterization equipment and help.