Effect of Sn addition on the optical gap and far-infrared reflectivity spectra of amorphous Sb-Se films

Praveen Kumar; R. Thangaraj; T. S. Sathiaraj

doi:10.1016/j.jnoncrysol.2010.05.046

Effect of Sn addition on the optical gap and far-infrared reflectivity spectra of amorphous Sb-Se films

Praveen Kumar, R. Thangaraj, T. S. Sathiaraj

Physics & Astronomy

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

This paper reports the spectroscopic studies on the thermally evaporated Sn_xSb₂₀Se₈₀ _- _x (2 ≤ x ≤ 8) films. Optical gap and band tailing parameter decreases except for x = 8, where it increases. The red shift in peak reflectivity spectrum in the interband transition region (200-800 nm) has been observed. The position and shape of the reflectivity bands (80-378 cm^{- 1}) indicate the change in the local structure of the films. The Kramer-Kronig transformations have been used to evaluate the dielectric constants from the far-infrared reflectivity spectrum. Splitting of the longitudinal optic and transverse optic mode characterizes the partial ionic character for Sn-Sb-Se system. The relationship between the optical properties and structure has been revealed.

Original language	English
Pages (from-to)	1611-1613
Number of pages	3
Journal	Journal of Non-Crystalline Solids
Volume	356
Issue number	31-32
DOIs	https://doi.org/10.1016/j.jnoncrysol.2010.05.046
Publication status	Published - 2010

All Science Journal Classification (ASJC) codes

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

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10.1016/j.jnoncrysol.2010.05.046

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title = "Effect of Sn addition on the optical gap and far-infrared reflectivity spectra of amorphous Sb-Se films",

abstract = "This paper reports the spectroscopic studies on the thermally evaporated SnxSb20Se80 - x (2 ≤ x ≤ 8) films. Optical gap and band tailing parameter decreases except for x = 8, where it increases. The red shift in peak reflectivity spectrum in the interband transition region (200-800 nm) has been observed. The position and shape of the reflectivity bands (80-378 cm- 1) indicate the change in the local structure of the films. The Kramer-Kronig transformations have been used to evaluate the dielectric constants from the far-infrared reflectivity spectrum. Splitting of the longitudinal optic and transverse optic mode characterizes the partial ionic character for Sn-Sb-Se system. The relationship between the optical properties and structure has been revealed.",

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T1 - Effect of Sn addition on the optical gap and far-infrared reflectivity spectra of amorphous Sb-Se films

AU - Kumar, Praveen

AU - Thangaraj, R.

AU - Sathiaraj, T. S.

PY - 2010

Y1 - 2010

N2 - This paper reports the spectroscopic studies on the thermally evaporated SnxSb20Se80 - x (2 ≤ x ≤ 8) films. Optical gap and band tailing parameter decreases except for x = 8, where it increases. The red shift in peak reflectivity spectrum in the interband transition region (200-800 nm) has been observed. The position and shape of the reflectivity bands (80-378 cm- 1) indicate the change in the local structure of the films. The Kramer-Kronig transformations have been used to evaluate the dielectric constants from the far-infrared reflectivity spectrum. Splitting of the longitudinal optic and transverse optic mode characterizes the partial ionic character for Sn-Sb-Se system. The relationship between the optical properties and structure has been revealed.

AB - This paper reports the spectroscopic studies on the thermally evaporated SnxSb20Se80 - x (2 ≤ x ≤ 8) films. Optical gap and band tailing parameter decreases except for x = 8, where it increases. The red shift in peak reflectivity spectrum in the interband transition region (200-800 nm) has been observed. The position and shape of the reflectivity bands (80-378 cm- 1) indicate the change in the local structure of the films. The Kramer-Kronig transformations have been used to evaluate the dielectric constants from the far-infrared reflectivity spectrum. Splitting of the longitudinal optic and transverse optic mode characterizes the partial ionic character for Sn-Sb-Se system. The relationship between the optical properties and structure has been revealed.

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JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

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Effect of Sn addition on the optical gap and far-infrared reflectivity spectra of amorphous Sb-Se films

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