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Title: An Optical and Electrical Study of a Ge Se In and a Ge Se In Bi Glassy Alloys
Researcher: Sharma, Ishu
Guide(s): Barman, P.B.
Keywords: Optical, Electrical, a-Ge-Se-In-Bi glassy
Upload Date: 11-Sep-2013
University: Jaypee University of Information Technology, Solan
Completed Date: 19/02/2009
Abstract: This thesis work is concerned with the study of optical, electrical and physical properties of a-Ge-Se-In and a-Ge-Se-In-Bi glassy alloys and their corresponding thin films. Glassy alloys and their thin films prepared and studied are: newlineI. Ge20Se80-xInx (x = 0, 5, 10, 15, 20) newlineII. Ge20Se70-xIn10Bix (x = 2, 4, 6, 8, 10) newlineMelt quench technique has been used for the growth of glassy alloys. Thin films of prepared samples were deposited using thermal evaporation technique at base pressure of ~10-4 Pa. 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 spectra (400 1800 nm) 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. Steady state photoconductivity has been studied in temperature range 303 375 K. Intensity dependent photocurrent has been measured in 3 - 1035 Lux range. Physical parameters of both a-Ge-Se-In and a-Ge-Se-In-Bi glassy alloys have been estimated. newline newline
Appears in Departments:Department of Physics and Material Science

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01_title.pdfAttached File76.17 kBAdobe PDFView/Open
02_acknowledgement.pdf157.52 kBAdobe PDFView/Open
03_contents.pdf336.64 kBAdobe PDFView/Open
04_list of tables figures.pdf848.82 kBAdobe PDFView/Open
05_chapter 1.pdf3.42 MBAdobe PDFView/Open
06_chapter 2.pdf1.25 MBAdobe PDFView/Open
07_chapter 3.pdf3.7 MBAdobe PDFView/Open
08_chapter 4.pdf3.06 MBAdobe PDFView/Open
09_chapter 5.pdf2.73 MBAdobe PDFView/Open
10_chapter 6.pdf374.28 kBAdobe PDFView/Open

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