Synthesis and Characterization of Silver Selenide Thin Films by Chemical Bath Deposition and Ionic Exchange

E. Fernández-Díaz*, A. B. Espinoza-Martinez, A. Flores-Pacheco, R. Ramírez-Bon, S. J. Castillo, R. Ochoa-Landin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

In this work, Ag 2 Se thin films were synthetized by a two-step technique at standard laboratory conditions. In the first step a silver hydrogen oxide carbonate thin film matrix was obtained by the chemical bath deposition technique. In the second step an ionic exchange between the matrix film and a new selenium ion solution was performed. The presence of silver and selenium atoms was detected by energy dispersive x-ray spectroscopy. From x-ray diffraction characterization, it was concluded there was an orthorhombic and polycrystalline structure for this material, Ag 2 Se. On the other hand, it was confirmed by transmission electron microscopy. The binding energies of silver and selenium were detected by x-ray photoelectron spectroscopy. From the ultraviolet–visible absorption spectra for the nanostructured Ag 2 Se thin film it was observed there was a blue shift in its bandgap, being 1.37 eV, meanwhile the reported bulk bandgap value is 0.15 eV.

Original languageEnglish
JournalJournal of Electronic Materials
DOIs
StatePublished - 1 Jan 2019

Bibliographical note

Publisher Copyright:
© 2019, The Minerals, Metals & Materials Society.

Keywords

  • Thin films
  • chalcogenide
  • silver selenide
  • synthesis technique

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