20 بهمن 1401
داريوش سوري

داریوش سوری

مرتبه علمی: استاد
نشانی:
تحصیلات: دکترای تخصصی / فیزیک ماده چگال
تلفن:
دانشکده: دانشکده علوم پایه

مشخصات پژوهش

عنوان
Band gap determination by absorption spectrum fitting method (ASF) and structural properties of different compositions of (60-x) V2O5-40TeO2- x Sb2O3 glasses
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Keywords: Composition Band structure Chalcogenides Optical properties Absorption
سال
2009
مجله JOURNAL OF NON-CRYSTALLINE SOLIDS
پژوهشگران داریوش سوری

چکیده

Glasses with compositions (60x)V2O5–40TeO2–xSb2O3 with 0 6 x 6 10 (in mol%) have been prepared using usual melt quenching method. The position of the absorption edge and hence the values of the opti- cal band gap was found to depend on the glass composition. Using the Tauc model, the absorption spec- trum fitting method (ASF) was employed to obtain the optical band gap. This method requires only the measurement of the absorbance spectrum of the sample. For each sample, the width of the band tail was determined. Also, the density and glass transition temperature values indicate that the rigidity and pack- ing of the samples increase with increase in Sb2O3 concentration.