Physics, Engineering Physics and Astronomy, Department of
The Physics, Engineering Physics, and Astronomy is one of Canada's leading teaching and research institutes in Physics, Engineering Physics and Astronomy. Our faculty include high-profile, world-class physicists who work on cutting edge areas of theoretical, computational, applied and experimental physics.
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Anisotropic Fluid Solutions to Einstein's Equations in Spherical Symmetry
The main objective of this thesis is to develop and investigate a class of spherically symmetric solutions to Einstein's field equations for anisotropic matter distributions. This work is partially motivated by a recent ... -
Neutron Measurements and Reactor Antineutrino Search with the SNO+ Detector in the Water Phase
The SNO+ experiment is a large-scale liquid scintillator neutrino experiment with a wide range of physics objectives. SNO+ has adopted a staged approach where the detector was first filled with ultra-pure water before ... -
Stress Testing Polymer Light-Emitting Electrochemical Cells: Suppression of Voltage Drift and Black Spot Formation
(Wiley, 2018)The stress characteristics of the polymer light-emitting electrochemical cells (PLECs) are comprehensively evaluated by varying a host of material and operational parameters. PLECs with the lowest salt concentration of ... -
Bipolar Electrode Array Embedded in a Polymer Light-Emitting Electrochemical Cell
(American Chemical Society (ACS), 2017-09-20)A linear array of aluminum discs is deposited between the driving electrodes of an extremely large planar polymer light-emitting electrochemical cell (PLEC). The planar PLEC is then operated at a constant bias voltage of ... -
Strategies toward Long-Life Light-Emitting Electrochemical Cells
(Wiley, 2018-04-01)Abstract This Minireview examines the operational lifetime of light-emitting electrochemical cells (LECs). Under continuous operation, both polymer-based LECs (PLECs) and ionic transition-metal complex (iTMC)-based LECs ... -
Wireless Electroluminescence: Polymer Light-Emitting Electrochemical Cells with Inkjet-Printed 1D and 2D Bipolar Electrode Arrays
(American Chemical Society (ACS), 2018-04-26)One-dimensional (1D) and two-dimensional (2D) arrays of conductive microdisks are printed on glass substrates using a silver nanoparticle (Ag-NP)-based ink. Polymer light-emitting electrochemical cells (PLECs) are then ... -
Polymer light-emitting electrochemical cells—Recent advances and future trends
(Elsevier BV, 2018-01-01)Polymer light-emitting electrochemical cells (PLECs) are electroluminescent devices whose operation involves both ionic and electronic charges. A key reaction in PLEC is the electrochemical doping of the light emitter, a ... -
Laser-Induced Bipolar Electrochemistry—On-Demand Formation of Bipolar Electrodes in a Solid Polymer Light-Emitting Electrochemical Cell
(American Chemical Society (ACS), 2018-08-01)Bipolar electrochemistry (BPEC) is a versatile and powerful technique that has found applications in sensing, chemical synthesis, catalysis, fuel cells, and batteries, among others. In BPEC, the reactions of interest occur ... -
Visualizing the Bipolar Electrochemistry of Electrochemically Doped Luminescent Conjugated Polymers
(American Chemical Society (ACS), 2017-04-20)A micromanipulated vacuum probe station and fluorescence imaging are used to induce and visualize bipolar electrochemical redox reactions in a solid-state polymer light-emitting electrochemical cell (PLEC). The PLEC is a ... -
Dynamic Bipolar Electrode Array for Visualized Screening of Electrode Materials in Light-Emitting Electrochemical Cells
(American Chemical Society (ACS), 2019-01-09)Charge injection at a metal/semiconductor interface is of paramount importance for many chemical and physical processes. The dual injection of electrons and holes, for example, is necessary for electroluminescence in organic ... -
High resolution scanning optical imaging of a frozen planar polymer light-emitting electrochemical cell: an experimental and modelling study
(Springer Science and Business Media LLC, 2017-04-01)Light-emitting electrochemical cells (LECs) are organic photonic devices based on a mixed electronic and ionic conductor. The active layer of a polymer-based LEC consists of a luminescent polymer, an ion-solvating/transport ... -
Decoding the Polymer p–n Junction: Controlled Dedoping and Reverse Bias Electroluminescence
(Wiley, 2020)The polymer light-emitting electrochemical cell (PLEC) is a unique solid-state device possessing attractive attributes for low-cost applications, but also a junction structure that is still poorly understood. In a PLEC, ... -
The dynamic bipolar electrode in polymer light-emitting electrochemical cells
(Elsevier BV, 2019-05-01)The redox doping reactions in polymer light-emitting electrochemical cells (PLECs) have been analyzed to gain insight into a new type of bipolar electrode (BPE) formed within the cells. Planar (lateral) PLECs are constructed ... -
Quantum Trajectory Theory of Open Cavity-QED Systems with a Time Delayed Coherent Optical Feedback
The emergence of integrated (or solid state) photonic systems, including quantum dots, waveguides, and cavities, has provided a base to harness quantum optic phenomena for use in current and future quantum technologies. ... -
Shaping Electroluminescence with a Large, Printed Bipolar Electrode Array: Solid Polymer Electrochemical Cells with Over a Thousand Light‐Emitting p–n Junctions
(Wiley, 2020-03-31)The electroluminescence from a solid polymer light‐emitting electrochemical cell typically originates from a single, narrow p‐n or p‐i‐n junction. The bulk of the active material is non‐emitting and must be doped before ... -
Enhancing the Capabilities of the CANDU Gap Probe
Fuel channels in CANDU (CANadian Deuterium Uranium) nuclear reactors consist of two non-concentric tubes; an inner pressure tube (PT) and a larger diameter calandria tube (CT), within which the PT is contained. The gas ... -
Optimization of spherical proportional counter backgrounds and response for low mass dark matter search
The NEWS-G collaboration uses Spherical Proportional Counters to search for Weakly Interacting Massive Particles (WIMP). The first detector developed for this goal is a 60 cm diameter sphere installed at the Laboratoire ... -
Computational study of rovibrational spectrum of CO-CO 2
The Lanczos algorithm was used to determine J=0 and J=1 ro-vibrational energy levels for CO-CO2 . The fundamental transition energies have good agreement with previous experiments for both the C-bound and O-bound isomers. ... -
End-to-End Quality Assurance of Complex Radiation Therapy Treatments
Radiation treatments have become increasingly complex, making quality assurance (QA) of radiation therapy deliveries of vital importance. In order to measure complex dose deliveries, it is crucial to have the proper ... -
Electron Recoils In the PICO Direct Dark Matter Detection Experiment
The PICO-40L bubble chamber for direct dark matter detection is finishing the commissioning phase at SNOLAB. The detector will operate for 1 live year before being replaced by the next-generation detector, PICO-500. The ...
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