Electrical and optical properties of selenium and vanadium pentoxide thin films
Other Title(s)
الخواص الكهربائية و البصرية لأفلام السيلينيوم و أفلام أكسيد الفناديوم الرقيقة
Dissertant
al-Kasasibah, Usamah Muhammad Salman
Thesis advisor
University
Mutah University
Faculty
Faculty of Science
Department
Department of physics
University Country
Jordan
Degree
Master
Degree Date
2010
English Abstract
V2O5 and Se thin films on glass substrate were prepared under vacuum by using thermal evaporation technique using molybdenum boats.
The films were deposited with different thicknesses.
Deposition rate was controlled by using quartz monitor connected with the system and the rate was 5nm per thickness.
The optical constants (Thickness, Refractive indices, Absorption coefficients, Extinction coefficients and energy gaps) were determined from measuring the reflectivity and Transmissivity for the films using spectrometer in the spectral range 300 to 900 nm, the energy gaps were determined for all films and found that for Se films the energy gap was about 1.8 eV and for V2O5 about 2 eV.
The electrical properties for the films were determined by the direct measuring of the sheet resistance of the prepared samples using a digital Diethyl electrometer and found that the electrical conductivity was increasing with decreasing film thickness for all films.
And then we have studied the effect of temperature on conductivity and it shows that for all film the electrical conductivity was increasing with increasing temperature.
Finally, the activation energy for films was determined where it was about 0.78 eV for Se films and about 0.4 eV for V2O5 films.
All films have amorphous structure as obtained from XRD technique.
Finally films with height absorption have height electrical conductivity.
Main Subjects
Topics
No. of Pages
53
Table of Contents
Table of contents.
Abstract.
Chapter one : Introduction.
Chapter two : Theoretical background.
Chapter three : Experimental procedure.
Chapter four : Results and discussions.
References.
American Psychological Association (APA)
al-Kasasibah, Usamah Muhammad Salman. (2010). Electrical and optical properties of selenium and vanadium pentoxide thin films. (Master's theses Theses and Dissertations Master). Mutah University, Jordan
https://search.emarefa.net/detail/BIM-304871
Modern Language Association (MLA)
al-Kasasibah, Usamah Muhammad Salman. Electrical and optical properties of selenium and vanadium pentoxide thin films. (Master's theses Theses and Dissertations Master). Mutah University. (2010).
https://search.emarefa.net/detail/BIM-304871
American Medical Association (AMA)
al-Kasasibah, Usamah Muhammad Salman. (2010). Electrical and optical properties of selenium and vanadium pentoxide thin films. (Master's theses Theses and Dissertations Master). Mutah University, Jordan
https://search.emarefa.net/detail/BIM-304871
Language
English
Data Type
Arab Theses
Record ID
BIM-304871
