کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1572445 1514427 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of vacuum-evaporated ZnSe thin films
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Characterization of vacuum-evaporated ZnSe thin films
چکیده انگلیسی

ZnSe thin films were prepared at different thicknesses using a vacuum evaporation technique under a vacuum of 3.9 × 10− 8 bar. The composition, structure, optical and electrical properties of the deposited ZnSe thin films were studied using the energy dispersive X-ray analysis (EDAX), X-ray diffraction (XRD), optical transmittance and current–voltage measurements. The composition of the deposited films was found to be Zn (34.35%) and Se (65.65%). SEM images of ZnSe films on glass substrates revealed the smooth surface of the deposited films. X-ray analysis showed that the films deposited at a lower thickness were amorphous in nature, whereas at higher thicknesses, the films were crystalline in nature. The XRD patterns for higher thickness films exhibited reflections corresponding to the cubic (111) phase (2θ = 27.33°). The values of the estimated energy gap from optical studies for amorphous films were greater than that obtained for crystalline ZnSe (Eg = 2.7 eV) films. In the dc conduction studies, the free carrier mobility (μp), carrier density (p0) and trap density values were calculated as 9.1738 × 10− 15 m2 V− 1 s− 1, 1.068 × 1023 m3 and 4.2733 × 1022 m− 3, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 58, Issues 8–9, August–September 2007, Pages 794–799
نویسندگان
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