Fabrication and study of SnO2 UV-photodetector
Other Title(s)
تصنيع و دراسة كاشف التوصيل الضوئي أوكسيد القصدير للأشعة فوق البنفسجية
Dissertant
Thesis advisor
Natiq, Naji Usamah
Suhayl, Abd Allah Muhsin
Comitee Members
Jasim, Amil Kazim
Ulwan, Ulwan M.
University
University of Baghdad
Faculty
College of Science
Department
Department of Physics
University Country
Iraq
Degree
Master
Degree Date
2014
English Abstract
In this work a Tin Oxide (SnO2) UV photoconductive detector was fabricated.
The Tin Oxide nanopowder is prepared by chemical method and deposited on glass and porous silicon by dipping coating technique.
The structural , morphological, optical and electrical properties of the prepared SnO2 nanopowder are studied .
The structure of the nano powder are examined by X-ray diffraction (XRD) and found to be polycrystalline of tetragonal structure with strong crystalline orientation at (110 and 101).The optical energy gap is calculated by the absorption spectrum which gives a value of 3.78eVand 4.3eV.
The photoluminescence emission spectra of SnO2 nanoparticles at 280nm excitation, exhibit emission at 437nm.
The emission maximum of 437 nm is lower than the band gap of the SnO2 bulk.
The surface morphological studies demonstrate that SnO2 nanopowder deposited on PS is improved and the average particle size has determined from Scanning Probe Microscope, is about 73.65 nm.
The Hall measurements show that the nanopowder prepared in such conditions are n-type with carrier concentration (n) of a bout -1.273×1017 cm-3.
The I-V characteristics ( photoresponsivity , photocurrent gain and the normalized detectivity) of the fabricated detector are measured.
The performance of the fabricated detectors are taken under illumination of the SnO2 detector using light power 2.5mW and 385nm UV radiation.
The surface functionalization of the SnO2 deposited on porous silicon (PS) layer by polyamide nylon polymer has improved the photoresponsivity of the detector to 0.1 A/W.
The response time of fabricated detector was measured by illuminating the sample with UV radiation and its values was (0.052ms).
The normalized detectivity (D*) of the fabricated SnO2 UV detector at wavelength of 385 nm is found to be 1.8 ×1010 cm Hz1/2 W-1.
Main Subjects
No. of Pages
62
Table of Contents
Table of contents.
Abstract.
Abstract in Arabic.
Chapter One : Introduction and basic concepts.
Chapter Two : The experimental work
Chapter Three : Results and discussion.
References.
American Psychological Association (APA)
Ghafil, Azhar Shakir Nuri. (2014). Fabrication and study of SnO2 UV-photodetector. (Master's theses Theses and Dissertations Master). University of Baghdad, Iraq
https://search.emarefa.net/detail/BIM-607260
Modern Language Association (MLA)
Ghafil, Azhar Shakir Nuri. Fabrication and study of SnO2 UV-photodetector. (Master's theses Theses and Dissertations Master). University of Baghdad. (2014).
https://search.emarefa.net/detail/BIM-607260
American Medical Association (AMA)
Ghafil, Azhar Shakir Nuri. (2014). Fabrication and study of SnO2 UV-photodetector. (Master's theses Theses and Dissertations Master). University of Baghdad, Iraq
https://search.emarefa.net/detail/BIM-607260
Language
English
Data Type
Arab Theses
Record ID
BIM-607260
