@article{ajmse2013133,
author={{Dwivedi, D. K. and Pathak, H. P. and Shukla, R. K. and Kumar, A.},
title={Structural and Optical Investigations of Amorphous Se<SUB>75-x</SUB>Te<SUB>25</SUB>Sb<SUB>x</SUB> Thin Films},
journal={American Journal of Materials Science and Engineering},
volume={1},
number={3},
pages={46--49},
year={2013},
url={http://pubs.sciepub.com/ajmse/1/3/3},
abstract={Thin films of Se<SUB>75-x</SUB>Te<SUB>25</SUB>Sb<SUB>x</SUB> (x = 0, 3, 6, &amp; 9) glassy alloys have been deposited onto a chemically cleaned glass substrate by thermal evaporation technique under vacuum. Glassy nature of the films has been ascertained by X-ray diffraction pattern. The analysis by absorption spectra, measured at normal incidence, in the spectral range 400-1100 nm has been used for the optical characterization of thin films under investigation. The optical constants (absorption coefficient (¦Á), extinction coefficient (k)) and optical band gap (E<SUB>g</SUB>) have been studied. It has been found that extinction coefficient (k) decreases with increase in wavelength (¦Ë). The absorption coefficient (¦Á) is found to increase with incident photon energy. Optical band gap (E<SUB>g</SUB>) has also been calculated and found to decrease with Sb content in Se<SUB>75-x</SUB>Te<SUB>25</SUB>Sb<SUB>x</SUB> (x = 0, 3, 6, &amp; 9) glassy system. The decrease of optical band gap (E<SUB>g</SUB>) with Sb concentration has been explained on the basis of Mott and Davis model.},
doi={10.12691/ajmse-1-3-3}
publisher={Science and Education Publishing}
}