Moldavian Journal of the Physical Sciences (Dec 2010)

Structural changes in chemically deposited CdS: effect of thermal annealing

  • Maticiuc, Natalia,
  • Potlog, Tamara,
  • Hiie, J.,
  • Mikli, V.,
  • Poldme, Nils,
  • Raadik, T.,
  • Valdna, V.,
  • Mere, Arvo,
  • Gavrilov, A.,
  • Quinci, F.,
  • Lughi, V.,
  • Sergo, V.

Journal volume & issue
Vol. 9, no. 3-4
pp. 275 – 279

Abstract

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The dynamics of changes in the structural and optical properties of chemical bath- deposited (CBD) CdS/glass thin films in H2 annealing process in a pre-heated furnace between 200–450°C was studied systematically. Annealing imparts structural stability to the layers, but reduces band gap (Eg). Results of X-ray diffraction (XRD) and visible optical spectroscopy characterization of annealed CBD CdS/glass thin films are presented. We propose a hypothesis about substitutional incorporation of OH group on S site in CdS lattice in the deposition process and its responsibility for changes in the optical and structural properties of CdS in the annealing process. Cubic CdS is a stable and prevalent phase in CBD CdS at 450°C.