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O. V. IASENIUC1, M. ENACHESCU2, D. DINESCU2, M. S. IOVU1, S. A. SERGHEEV1
- Institute of Applied Physics, Str. Academiei 5, MD-2028 Chisinau, R. Moldova
- Centre for Science and Nanotechnology, Splaiul Independentei 313, Bucharest, Romania
Optical investigation such as infrared (IR) absorption and Raman spectra are efficient methods for obtaining information on the local structure of the disordered material, especially when the composition is varied. In this paper are reported the optical absorption and Raman spectra of chalcogenide glasses (As4S3Se3)1-xSnx (x=0 0.1) and amorphous thin films asdeposited, illuminated and heat treated. For ternary As4S3Se3 chalcogenide glasses the absorption bands of S-H (Se-H) and H2O located at =5190 cm-1 and =3617 cm-1 , characteristic for vitreous As2S3 are essentially reduced respectively. The Raman spectra of chalcogenide glasses and thermally deposited amorphous (As4S3Se3)1-xSnx thin films consist of two broad bands located at around =236 cm-1 and =345 cm-1 , which corresponds to the symmetric stretching vibration modes of AsSe3/2 and AsS3/2 pyramids, respectively. Tin impurities didn’t change the shape of Raman spectra, but shift the both bands to low frequency region. The light exposure of amorphous (As4S3Se3)1-xSnx thin films shifts the main maximums of Raman spectra toward the lower frequencies region and decreases the picks intensities..
Chalcogenide glasses, Amorphous films, Raman spectra, Vibration modes.
Submitted at: Nov. 2, 2015
Accepted at: Feb. 10, 2016
O. V. IASENIUC, M. ENACHESCU, D. DINESCU, M. S. IOVU, S. A. SERGHEEV, Influence of heat treatment and illumination on the vibration modes of (As4S3Se3)1-xSnx thin films, Journal of Optoelectronics and Advanced Materials Vol. 18, Iss. 1-2, pp. 34-38 (2016)
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