Browsing Physics, Engineering Physics and Astronomy, Department of by Title
Now showing items 66-85 of 255
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Early development of a test-bed to measure fractoluminescence in scintillators & simulation of a Na-24 source for the SNO+ experiment
(2014-06-24)This thesis consists of two parts; the first part pertains to fractoluminescence as a potential background in crystal scintillator detectors, and the second part bears on the simulation of a 24Na source to be used during ... -
The Effect of Disorder on Strongly Correlated Electrons
(2011-08-31)This thesis is devoted to a study of the effect of disorder on strongly correlated electrons. For non-interacting electrons, Anderson localization occurs if the amount of disorder is sufficient. For disorder-free systems, ... -
Effect of Encapsulation and Light-Soaking on Charge Transport Properties in Organic Semiconductor-Based Diodes
Organic semiconductors (OSs) are gaining attention due to their processability, optical and electrical tunability, and cost-effectiveness. This class of materials is most suitable for flexible electronics and bioelectronics, ... -
The Effects of Fractal Molecular Clouds on the Dynamical Evolution of Oort Cloud Comets
(2009-09-23)The Oort Cloud (OC) is a roughly spherical cloud of comets surrounding the solar system, stretching from well beyond the orbit of Neptune, half way to the nearest star. This body of comets is interesting because it ... -
The Effects of Multi-exciton Interactions on Optical Cavity Emission
(2012-07-31)This thesis presents a theoretical study of the collective effects of a large number of photon emitters coupled to optical cavities. The ensemble effects are accounted for by considering both the light emitting and ... -
Efficiency enhancement of ternary blend organic photovoltaic cells with molecular glasses as guest acceptors
(Elsevier, 2017-11-06)Previously reported glass-forming perylenediimide (PDI-glass) and diketopyrrolopyrrole (DPP-glass) acceptors were used as ternary components to modulate the morphology and electron transport properties of bulk heterojunctions ... -
Electrical and Optical Probing of Extremely Large Planar Polymer Light-Emitting Electrochemical Cells
(2011-05-13)Polymer light-emitting electrochemical cells (LECs) are unique solid-state light-emitting devices operating on the principle of in situ electrochemical doping and the formation of a p-n junction. Compared to conventional ... -
The energy calibration for the solar neutrino analysis of all three phases of the Sudbury Neutrino Observatory
(2009-09-26)This work presents the calibration of the energy response of the Sudbury Neutrino Observatory (SNO). The development of the energy response processor RSP and its use in setting the energy scale of SNO and reconstructing ... -
Energy Transfer Between Molecules in the Vicinity of Metal Nanoparticle
(2011-07-05)Nanoplasmonics has opened up the gates for numerous innovations. Recent studies showed that metal nanoparticles, when introduced into the solar cells and organic light emitting diodes, would greatly enhance their efficiencies. ... -
Environmental Effects on Interacting Galaxy Pairs in the SDSS
(2014-09-16)The cause of varying galaxy interaction outcomes in different environments is investigated using a sample of over 505,000 Sloan Digital Sky Survey Data Release 7 galaxies at $0.01<z<0.20$. The aim is to distinguish the ... -
The Evolution of Star Formation Activity in Cluster Galaxies Over 0.15 < z < 1.5
(2014-10-01)In this thesis, we explore 7.5 billion years of evolution in cluster galaxy star formation activity using a sample of 11 high-redshift (1 < z < 1.5) clusters from the IRAC Shallow Cluster Survey, and 25 low-redshift (0.15 ... -
Evolving Galactic Dynamos and Fits to the Reversing Rotation Measures in Edge-On Galaxies
Rotation measure (RM) synthesis maps of NGC 4631 by Mora-Partiarroyo et al. (2018) show remarkable sign reversals on kpc scales as the distance from the minor axis increases in the northern halo of the galaxy. RM maps for ... -
Exciton relaxation dynamics in a one-dimensional semiconductor
(2013-12-09)Carbon nanotubes are intriguing materials and extensively studied for both their fundamental properties and extraordinary performance in various applications during the last 20 years. They are extremely small in diameter, ... -
Excitonic Analysis of Many-Body Effects on the 1s−2p Intraband Transition in Semiconductor Systems
(2011-06-06)I present a detailed study of many-body effects associated with the interband 1s transition and intraband 1s-2p transition in two- and three-dimensional photo-excited semiconductors. I employ a previously developed excitonic ... -
An Excitonic Approach to the Ultrafast Optical Response of Semiconductor Nano-Structures
(2008-12-02)In this thesis, I present an excitonic approach to treating the coherent dynamics of optically generated charge carriers in semiconductor nanostructures. The main feature of this approach is that it includes exchange ... -
Experimental and Theoretical Studies of Highly-Excited Molecules at a Wide Range of Internuclear Distances
(2012-01-31)Experimental and theoretical investigations of highly-excited molecules are presented that advance the current state of knowledge of intramolecular interactions in highly-excited molecular states. A quantitative analysis ... -
Experiments and Monte Carlo Analysis for the Optical Properties of the Scintillator in SNO+
(2010-09-22)The SNO+ experiment will be the SNO detector filled with a neodymium-loaded liquid scintillator instead of heavy water. SNO+ will be used to detect neutrinos of much lower energy. Also, SNO+ will conduct a search for ... -
Exploiting ultrafast optical pulses: probing excitonic properties of 2D materials and utilizing the Kerr effect for all-optical switching
Ultrafast optics technology involves the development and application of femtosecond optical pulses. The work presented in this thesis consists of two research objectives which exploit these aspects of ultrafast optics ... -
Fabrication and DC characterization of single electron transistors at low temperature
(2007-08-02)The metallic single electron transistor (SET) has been shown to provide charge sensitivity on the order of 10-6 e/(Hz)1/2, when operated as a charge amplifier. This makes it an ideal candidate for low-noise measurement ... -
Fabrication of planar heterojunction CsPbBr2I perovskite solar cells using ZnO as an electron transport layer and improved solar energy conversion efficiency
(RSC, 2018-06-26)Inorganic lead halide perovskite solar cells with mixed halides have achieved reasonable power conversion efficiency with the advantage of an enhanced stability. In this work, we report the fabrication of an all inorganic ...