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Title: Effect of Bi Incorporation on the Optical Electrical and Thermal Properties of a Se Te and a Ge Te Glassy Alloys
Researcher: Ambika
Guide(s): Barman, P.B.
Keywords: a-Se-Te and a-Ge-Te
Optical and Electrical Properties
Thin Films
Upload Date: 19-Sep-2013
University: Jaypee University of Information Technology, Solan
Completed Date: 16/04/2010
Abstract: This thesis work is concerned with the effect of Bi incorporation on the optical, electrical and thermal properties of a-Se-Te and a-Ge-Te chalcogenide (ChG) glassy alloys. Glassy alloys and their thin films prepared and studied are: newlineI. Se85-xTe15Bix (x = 0, 1, 2, 3, 4, 5) newlineII. Ge20Te80-xBix (x = 0, 1.5, 2.5, 5.0) newlineMelt quenching technique has been used for the growth of glassy alloys. Thin films of prepared samples were deposited using thermal evaporation technique. X-ray diffraction technique has been used to know the nature (amorphous or crystalline) of bulk and deposited films. The optical properties have been estimated by analyzing the transmission and reflection spectra obtained from ultraviolet-visible-near infrared spectrometer. Swanepoel s method has been used to determine refractive index and extinction coefficient. Optical band gap has been calculated using Tauc extrapolation. The various electrical measurements on the thin films including both the dark and photoconductivity measurements at different temperatures were carried out in a metallic sample holder under a vacuum ~ 10-3 mbar throughout the measurements. In order to measure the thermal properties of a-Se-Te-Bi Differential Scanning Calorimetric technique (DSC) has been used whereas in case of a-Ge-Te-Bi system Differential Thermal Analysis (DTA) method has been employed. Some of the physical parameters have also been estimated for both of these series. newline
Appears in Departments:Department of Physics and Material Science

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01_title.pdfAttached File92.08 kBAdobe PDFView/Open
02_certificate.pdf80.54 kBAdobe PDFView/Open
03_acknowledgement.pdf146.67 kBAdobe PDFView/Open
04_contents.pdf395.81 kBAdobe PDFView/Open
05_list of tables figures.pdf919.6 kBAdobe PDFView/Open
06_chapter 1.pdf5 MBAdobe PDFView/Open
07_chapter 2.pdf1.33 MBAdobe PDFView/Open
08_chapter 3.pdf3.77 MBAdobe PDFView/Open
09_chapter 4.pdf3.35 MBAdobe PDFView/Open
10_chapter 5.pdf3.64 MBAdobe PDFView/Open
11_chapter 6.pdf516.68 kBAdobe PDFView/Open

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