Abstract
The kinetics of the photo-induced solid state chemical reaction of silver with a-As33S67 films in a conventional sandwich structure was measured by monitoring the change in thickness of the undoped chalcogenide using a modified computer-controlled technique. The kinetic data obtained show that there are two stages in the photo-induced reaction process. Rate coefficients and activation energies have been measured and a comparison of the composition and structure of the reaction products detected by Rutherford backscattering spectroscopy (RBS) has been made. The RBS spectra obtained at different stages of the photo-induced reaction process show a step-like form for the Ag concentration profile during the course of the reaction and indicate a homogeneous distribution of Ag in the final reaction products, the Ag concentration being 31 at.%. The step-like form of the Ag concentration profile is discussed in the framework of the G-CAg diagram for the Ag-As33S67 system. On the basis of the back scattering results a model is suggested which explains the kinetics of the photo-induced reaction.
| Original language | English |
|---|---|
| Pages (from-to) | 157-165 |
| Journal | Journal of Non-Crystalline Solids |
| Volume | 212 |
| Issue number | 2-3 |
| DOIs | |
| Publication status | Published - 1 Jan 1997 |
| MoE publication type | A1 Journal article-refereed |
Funding
One of the authors (T.W.) thanks the Natural Sciences and Engineering Council of Canada (NSERC) for providing a NATO fellowship and acknowledges the financial support of the Commission of the European Communities (Copernicus Program) under contract no. ERBCIPA CT940107. He is also grateful for the encouraging support given to this work by Professor S.O. Kasap from the University of Saskatchewan, Saskatoon, Canada.