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Synthesis and study the optical properties of 〖Ge〗_20 〖Bi〗_x 〖Se〗_(80-x) thin films | ||
| Iraqi Journal of Physics | ||
| Article 1, Volume 14, Issue 30, 2016, Pages 180-186 | ||
| Authors | ||
| Jassim Mohammed Salih AlFahdawi; Waleed Bdaiwi | ||
| Abstract | ||
| The optical propertiesof Ge_20 Bi_x Se_(80-x) thin filmatx=0,0.2 and 0.6 deposited on glass substrate with thickness of (205±50 nm ) was prepared using thermal evaporation technique. X-ray diffraction has been study and show amorphous crystalline for the films prepared with different concentration of Bismuth and annealed at temperatures 373 K and 473 K at one hour. A study of the absorption spectrum in the wavelengths (300-900) nm has been used to calculated the optical energy (Eg^opt) of the samples. The results show a decrease in the value of the optical energy with increase in Bismuth concentration in the sample, while increase (1.5-2)eV with increase of the temperature of annealing from 373 K to 473 K. | ||
| Keywords | ||
| Optical properties; Bix Se; xthin films; thermal evaporation technique | ||
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