Effect of heat treatment on the properties of Cd(OH)2 and CdO films grown by chemical bath deposition


Sahin B., Bayansal F., Çakmak H., Kahraman S., Çetinkara H.

Philosophical Magazine Letters, vol.93, no.2, pp.101-108, 2013 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 93 Issue: 2
  • Publication Date: 2013
  • Doi Number: 10.1080/09500839.2012.746791
  • Journal Name: Philosophical Magazine Letters
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.101-108
  • Keywords: band gap, Cd(OH) 2, CdO, chemical bath deposition, nanoparticles, thin films
  • Hatay Mustafa Kemal University Affiliated: Yes

Abstract

Nanostructured cadmium hydroxide (Cd(OH)2) thin films have been fabricated on glass substrates by the chemical bath deposition method and converted into cadmium oxide (CdO) films by heat treatments. Some of the films were studied as-grown and the others were annealed in air at 150, 300 and 450 °C. The effects of various annealing processes on the structural, morphological and optical properties of the Cd(OH)2 and CdO films were studied. The band gaps of the films vary from 2.74 eV to 2.32 eV for different annealing temperatures. It was observed that there is a direct dependence of the structural, morphological and optical properties on the annealing temperature of the films. X-ray diffraction (XRD) measurements showed that as-grown and annealed film at 150 °C fully consist of Cd(OH) 2 and the annealed films at 300 and 450 °C consist of CdO nanoparticles. The size of the nanoparticles, which were calculated from the scanning electron microscopy (SEM) figures by using a pixels program, was found to lie between 460 and 600 nm. © 2013 Copyright Taylor and Francis Group, LLC.