کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1485940 | 1510551 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Space charge limited conduction in a-(Ge20Se80)1âxSnx thin films
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
The present paper reports the dc conductivity measurements at high electric fields in vacuum evaporated amorphous thin films of (Ge20Se80)1âxSnx glassy alloys where 0 < x < 1. Current-voltage (I-V) characteristics have been measured at various fixed temperatures. In these samples, at low electric fields, ohmic behavior is observed. However, at high electric fields (E â¼Â 104 V/cm), non-ohmic behavior is observed. An analysis of the experimental data confirms the presence of space charge limited conduction (SCLC) in the glassy materials studied in the present case. From the fitting of the data to the theory of SCLC, the density of defect states (DOS) near Fermi level is calculated. These results show that the effect of incorporation of Sn in the Ge-Se system is quite different at its low and high concentration. This peculiar role of third element Sn as an impurity in the pure binary Ge20Se80 glassy alloy is also discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 352, Issues 30â31, 1 September 2006, Pages 3230-3235
Journal: Journal of Non-Crystalline Solids - Volume 352, Issues 30â31, 1 September 2006, Pages 3230-3235
نویسندگان
R. Singh, S.K. Tripathi, S. Kumar,