Optical and structural properties of CdS thin films grown by chemical bath deposition doped with Ag by ion exchange

Sergio R. Ferrá-González, Dainet Berman-Mendoza*, Rafael García-Gutiérrez, Santos J. Castillo, Rafael Ramírez-Bon, Bruce E. Gnade, Manuel A. Quevedo-López

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


In this work thin CdS films using glycine as a complexing agent were fabricated by chemical bath deposition and then doped with silver (Ag), by an ion exchange process with different concentrations of AgNO3 solutions. The CdS films were immersed in silver solutions using different concentrations during 1 min for doping and after that the films were annealed at 200 C during 20 min for dopant diffusion after the immersion on the AgNO 3 solutions. The aim of this research was to know the effects of different concentrations of Ag on the optical and structural properties of CdS thin films. The optical band gap of the doped films was determined by transmittance measurements, with the results of transmittance varying between 35% and 70% up to 450 nm in the electromagnetic spectra and the band gap varying between 2.31 and 2.51 eV depending of the silver content. X-ray photoelectron spectroscopy was used to study the influence of silver on the CdS:Ag films, as a function of the AgNO3 solution concentration. The crystal structure of the thin CdS:Ag films was studied by the X-ray diffraction method and the film surface morphology was studied by atomic force microscopy. Using the ion exchange process, the CdS films' structural, optical and electric characteristics were modified according to silver nitrate concentration used.

Original languageEnglish
Pages (from-to)1533-1536
Number of pages4
Issue number4
StatePublished - Feb 2014

Bibliographical note

Funding Information:
We would like to thank Roberto Mora Monroy for the technical assistance with the XPS measurements. We would also like to acknowledge the constant support from the University of Texas at Dallas and thank the Department of Materials Sciences and Engineering.


  • Cadmium sulfide
  • Doping
  • Glycine
  • Silver
  • Thin film


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