Crystallization effects in annealed thin GeS2 films photodiffused with Ag

Murali Balakrishnan, Michael Kozicki, Christian D. Poweleit, Shekhar Bhagat, Terry Alford, Maria Mitkova

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


We have investigated the diffusion products occurring after photodiffusion of Ag in GeS2 films at room temperature and after annealing up to 430 °C. Quantitative data regarding the host film composition and the amount of diffused silver has been gathered using Rutherford backscattering spectrometry. The structure of the glassy host and the changes appearing after silver photodiffusion and annealing are characterized using Raman spectroscopy. The crystalline diffusion products are depicted and their size calculated using X-ray diffraction. We have found that silver reacts with the host to form Ag2S and Ag2GeS3 and this leads to formation of Ge-rich backbone and overall nanostructured heterogeneous medium. Annealing at temperatures close to the glass transition temperature affects the backbone and brings about the appearance of a new diffusion product - Ag8GeS6.

Original languageEnglish (US)
Pages (from-to)1454-1459
Number of pages6
JournalJournal of Non-Crystalline Solids
Issue number13-15 SPEC. ISS.
StatePublished - May 15 2007


  • Chalcogenides
  • Photoinduced effects
  • Raman spectroscopy
  • Rutherford backscattering
  • X-ray diffraction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry


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