Publication Date:
2014-12-22
Description:
Thermal and optical characterization of Ge x Sn 10 Se 90− x ( x = 14, 18, 22, 26) glasses has been carried out using differential scanning calorimetry and UV–VIS–NIR spectroscopy, respectively. Bulk samples were prepared using conventional melt quenching technique. Amorphous nature of the prepared samples was confirmed using X-ray diffraction. The transmission spectra of as deposited films, for normal incidence, were recorded in the range 400–2,500 nm. Optical constants such as absorption coefficient, refractive index and extinction coefficients have been determined using the envelope method. Dispersion of refractive index has been analyzed using single-effective oscillator model. Optical band gap has been measured using Tauc plots. Effect of composition variation on thermal and optical properties has been discussed in view of chemical bond approach.
Print ISSN:
0947-8396
Electronic ISSN:
1432-0630
Topics:
Technology
,
Physics
