کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9830280 1524506 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optical properties of thermally evaporated Bi2Te3 thin films
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Optical properties of thermally evaporated Bi2Te3 thin films
چکیده انگلیسی
Bismuth telluride (Bi2Te3) films were formed by vacuum evaporation on to well-cleaned glass substrates. Multiple beam interferometer was employed to measure the thickness of the samples. The structure of the sample is analyzed by X-ray diffraction technique and is found to be crystalline. The d-spacing and the lattice parameters of the samples were calculated. The structural parameters were discussed on the basis of annealing effect and on the film thickness. Optical behavior of the film samples was analyzed by obtaining their transmission spectra, in the wavelength range of 400-800 nm. The transmission is found to decrease with increase in film thickness. The transmittance falls steeply with decreasing wavelength, indicating that the films are having considerable absorption throughout the visible region. The optical constants were estimated and the results are discussed. Optical band gap energy decreases as the film thickness increases.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 274, Issues 1–2, 15 January 2005, Pages 100-105
نویسندگان
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