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http://repository.aaup.edu/jspui/handle/123456789/2893
Title: | Design and Optical Characterization of Indium Sandwiched Molybdenum Trioxide Thin Films رسالة ماجستير |
Authors: | Kmail, Haifaa' Kamil$AAUP$Palestinian |
Keywords: | optical analysis,x-ray braggs law |
Issue Date: | 2018 |
Publisher: | AAUP |
Abstract: | In the current study, the structural, optical and dielectric properties of the MoO3/In/MoO3 nanosandwiched structures are investigated by means of X-ray diffraction and ultraviolet-visible light spectrophotometry techniques. While the thickness of MoO3 is kept at 500 nm, the thickness of the Indium slab is selected in the range of 25-200 nm. The insertion of 200 nm indium layer as a nanosandwich has induced the crystallization in the amorphous MoO3 films. Upon annealing, those sandwiched with 200 nm indium slab, displayed well crystalline phase of orthorhombic -MoO3 at annealing temperature of 250 oC. Optically, remarkable enhancement in the absorption coefficient associated with redshift in the energy band gap is observed. In addition, the dielectric spectral studies are found to exhibit a significant increase in the dielectric constant value with increasing indium slab thickness. The Drude –Lorentz modeling of the imaginary part of the dielectric spectra has shown that the insertion of thin layer of indium could increase the number of free carriers available for optoelectronic conduction. It reveals a wide variety in the plasmon resonant frequency on the surface of the MoO3/In/MoO3 films associated with the scattering time of electrons at gigahertz frequencies. However, it is observed that the 200 nm Indium sandwiched films have very distinct optical and dielectic properties different from other vii films with. These various properties are promising for using the MoO3 in different applications and it indicate the applicability of these sandwiched in optoelectronics devices. |
Description: | Master's degree in Physics |
URI: | http://repository.aaup.edu/jspui/handle/123456789/2893 |
Appears in Collections: | Master Theses and Ph.D. Dissertations |
Files in This Item:
File | Description | Size | Format | |
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هيفا كميل.pdf | 2.62 MB | Adobe PDF | View/Open |
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