کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1814852 | 1025656 | 2008 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optical and physical properties of different composition of InxSe1âx thin films
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Thin film binary alloys of InxSe1âx (0.05⩽x⩽0.30) have been prepared by the thermal evaporation technique. The optical transmission and reflection spectrum of these films were measured in the range 300-1100 nm. Both refractive index, n and extinction coefficient k have been determined from transmission and reflection measurements in terms of Murmann's equations. The dispersion of the refractive index is discussed in terms of the single-oscillator Wemple-DiDomenico model. The width of band tail is determined and the optical absorption edge is described using the 'non-direct transition' model proposed by Tauc. Finally, the relationship between the optical gap and chemical composition in InxSe1âx amorphous system is discussed in terms of the average heat of atomization Hs and average coordination number Nc. The results of these calculations can be used rationalize the observed optical properties of these materials. Finally, the chemical bond approach has been also applied to interpret the decrease of the glass optical gap with increasing In content.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 403, Issue 1, 1 January 2008, Pages 31-36
Journal: Physica B: Condensed Matter - Volume 403, Issue 1, 1 January 2008, Pages 31-36
نویسندگان
N. El-Kabnay, E.R. Shaaban, N. Afify, A.M. Abou-sehly,