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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Recent Submissions
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Development of Low-Energy Calibration Techniques for SuperCDMS using LEDs Operated at Cryogenic Temperatures
The desire to unveil the mystery of dark matter which, according to compelling astrophysical and cosmological evidence, constitutes about 85% of the matter in the Universe, drives physicists to continuously develop their ... -
Pulse fitting for event localization in high purity germanium point contact detectors
P-type Point Contact (PPC) detectors are used in rare-event searches, such as neutrinoless double-beta decay and dark matter searches, due to their low radioactive backgrounds and low energy thresholds. The Majorana ... -
Laying Foundations for a Nanophotonics Research Centre and an Emergency Communications Network
An interdisciplinary collaboration at Queen's is aiming to advance the frontiers of nanophotonics through shared equipment that will be introduced to the new Nanophotonics Research Centre (NanoRC), enabling picometer- and ... -
Search For Invisible Nucleon Decay in SNO+ With Improved Sensitivity
The water phase of the SNO+ (Sudbury Neutrino Observatory) experiment has completed after the collection of ~305 days of total livetime worth of data, divided into two main sets. The effective concentration of U-238 and ... -
Temperature Dependent Emission of Acrylic Relative to Tetrapheynl Butadiene (TPB)
After decades of astronomical observation and study, the majority of mass in the universe is known to be composed of dark matter, an unknown substance which is strictly non-luminous unlike the more familiar baryonic matter. ... -
Molecular-level study of N-heterocyclic carbenes: Binding modes and self-assembly on Au(111)
Self-assembled monolayers (SAMs) of organic molecules are extensively used to functionalize surfaces for a wide range of applications from medicine to nanophotonics. However, creating a SAM that is sufficiently stable has ... -
Solar KK axion search with NEWS-G
In theories with extra dimensions, the standard QCD axion has excited states with higher mass. These Kaluza-Klein (KK) axions would have a signi cantly shorter decay time and, when produced by the Sun, would remain ... -
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 ... -
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 ... -
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 ... -
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 ... -
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, ... -
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 ... -
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 ...
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