Study the Effect of Sn on the Amorphous Se-te Thin Films
نویسندگان
چکیده
Amorphous Se40-xTe60Snx glassy alloys have been synthesized by thermal evaporation technique under high vacuum conditions (~ 10 -5 torr). The optical spectra of amorphous Se40-xTe60Snx (x = 0, 2, 4, 6, 8) thin films have been measured by a double beam UV-VIS-NIR computer controlled spectrophotometer over the range of 200-3000 nm. Swanepole technique has been used to calculate the optical constants [refractive index (n),extinction coefficient (k) and absorption coefficient (α)] and optical band gap of amorphous Se40-xTe60Snx thin films. Absorption coefficient (α) increases with incident photon energy (hν) for all the samples. The optical band gap increases with increase of the tin (Sn) content. .
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