SYNTHESIS AND CHARACTERIZATION OF NANOCRYSTALLINE Co-DOPED ZnO THIN FILMS PREPARED BY CHEMICAL SPRAY PYROLYSIS FOR OPTOELECTRONIC APPLICATIONS

Faez M. Hassan and Aus A. Najim
Additional contact information
Faez M. Hassan: Physics Department, College of Education, Mustansiriyah University, Baghdad, Iraq
Aus A. Najim: ��Nanotechnology and Advanced Materials Research Center, University of Technology, Baghdad, Iraq

Surface Review and Letters (SRL), 2021, vol. 28, issue 12, 1-7

Abstract: ZnO:Co thin films were synthesized by the chemical spray pyrolysis (CSP) on glass substrates. Then, investigated the impact of Co doping concentration on its physical properties. XRD analyses show that all films have a polycrystalline structure of hexagonal ZnO. The crystallite size increased from 18nm to 25nm with Co doping concentrations. Furthermore, the unit cell volume increased from 47.485Å to 47.831Å, and the Zn–O bond length expanded from 1.97588Å to 1.98071Å. SEM observations reveal the formation of fiber-like nanostructures in the Co-doped thin films. The diameter of nanofibers increased with Co doping concentration from 260nm to 700nm. The optical characteristics were studied by the UV-Visible spectrophotometer and manifest the optical transparency vary with Co doping. In addition, the band gap decreases from 3.27eV to 2.73eV with increasing Co doping concentrations. The conductivity varied from 3.35S⋅m−1 to 19.88S⋅m−1 with Co doping concentrations. Empirical models were proposed to evaluate the correlated variables with excellent accuracy with the experimental data. The best result was accomplished in ZnO:Co1% films, where good transparency and high conductivity were achieved.

Keywords: CSP; ZnO thin films; nanofibers; empirical models (search for similar items in EconPapers)
Date: 2021
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.worldscientific.com/doi/abs/10.1142/S0218625X21501183
Access to full text is restricted to subscribers

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wsi:srlxxx:v:28:y:2021:i:12:n:s0218625x21501183

Ordering information: This journal article can be ordered from

DOI: 10.1142/S0218625X21501183

Access Statistics for this article

Surface Review and Letters (SRL) is currently edited by S Y Tong

More articles in Surface Review and Letters (SRL) from World Scientific Publishing Co. Pte. Ltd.
Bibliographic data for series maintained by Tai Tone Lim ().