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Iranian Journal of Materials Science and Engineering، جلد ۱۵، شماره ۳، صفحات ۰-۰
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| کلیدواژه‌های فارسی مقاله |
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| عنوان انگلیسی |
Thickness Dependence of Structural and Optical Properties of CdTe Films |
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| چکیده انگلیسی مقاله |
In this work, Cadmium Telluride (CdTe) thin films were deposited on glass substrates at room temperature by vacuum evaporation technique. The deposited CdTe thin films were characterized by X-ray diffraction, UV-Visible spectroscopy and Field emission scanning electron microscope (FESEM) techniques. Structural studies revealed that the CdTe films deposited at various thicknesses are crystallized in cubic structure. The results showed the improvement of the film crystallinity upon grain size increment. Optical constants such as refractive index (n), extinction coefficient (k), real and imaginary parts of dielectric constant, volume energy loss function (VELF), and surface energy loss function (SELF) were calculated using UV-Vis spectra. In addition, band gap and Urbach energies were calculated by Tauc and ASF methods. The band gap energy of the specimens was found to decrease from 1.8 to 1.4eV with increasing the thickness of films. The absorption coefficient, computed and plotted versus the photon energy (hν) and tailing in the optical band gap, was observed which is understood based on Urbach law. Urbach energy variation from 0.125 to 0.620 eV in the samples with higher thicknesses is concluded. |
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| کلیدواژه‌های انگلیسی مقاله |
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| نویسندگان مقاله |
| R. Zarei Moghadam
| M.H. Ehsani
| H. Rezagholipour Dizaji
| M.R. Sazideh
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| نشانی اینترنتی |
http://ijmse.iust.ac.ir/browse.php?a_code=A-10-1630-1&slc_lang=en&sid=1 |
| فایل مقاله |
اشکال در دسترسی به فایل - ./files/site1/rds_journals/454/article-454-677192.pdf |
| کد مقاله (doi) |
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| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
گروه سطح پوشش و خوردگی |
| نوع مقاله منتشر شده |
Research paper |
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