Raman spectra of Ag- and Cu-photo-doped As40S60-xSex films

• Published in: Journal of non-crystalline solids Vol. 270; no. 1-3; pp. 129 - 136
• Main Authors: STRONSKI, A. V, VLCEK, M, STETSUN, A. I, SKLENAR, A, SHEPELIAVYI, P. E
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier 01.05.2000
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Disordered solids; Exact sciences and technology; Glasses; Infrared and raman spectra and scattering; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Physics; Structure of solids and liquids; crystallography; Raman spectra; Selenides sulfides; Photodoping; Ternary compounds; Copper additions; Silver additions; Diffusion; Experimental study; Chalcogenide glasses; Arsenic compounds
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/S0022-3093(00)00002-8

Raman spectra of the chalcogenide vitreous layers (As40S60, As40S40Se20, As40S20Se40, As40Se60) nondoped and photodoped by Ag, Cu were measured. The spectra were analyzed in terms of a molecular model. For the spectra of photodoped As40S60-xSex layers, the shift of the main bands to the hf side, and the appearance of the additional scattering bands in the low frequency spectral range are characteristic features. Variations in the Raman spectra with photodoping by Ag or Cu are consistent with the supposition concerning normal covalent and coordinative bond formation between metal additives and chalcogen atoms, which results in the different activation energy values for the Ag photo-stimulated diffusion into chalcogenide layers. 38 refs.