Browsing Physics, Engineering Physics and Astronomy, Department of by Title
Now showing items 214-233 of 274
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Salt-Doped Polymer Light-Emitting Devices
(2013-12-04)Polymer Light-Emitting Electrochemical Cells (PLECs) are solid state devices based on the in situ electrochemical doping of the luminescent polymer and the formation of a p-n junction where light is emitted upon the ... -
Scaling and Optimization of Polymer Bulk Homojunction Light-Emitting and Photovoltaic Cells
(2008-09-15)The polymer light-emitting electrochemical cell (LEC) is an alternative method for producing electroluminescence (EL) from conjugated luminescent polymers. The in situ electrochemical doping process that leads to a dynamic ... -
Scanning Optical Imaging and Stress Tests of Polymer Light-Emitting Electrochemical Cells
Polymer light-emitting electrochemical cells (PLECs) were tested by means of bias stress, luminescent imaging and optical scanning probing. These cells were characterized in terms of the effect of doping on the operational ... -
Scanning Photocurrent and Photoluminescence Imaging of Frozen Polymer Light Emitting Electrochemical Cells
(2013-05-29)A polymer light-emitting electrochemical cell (LEC) is a solid-state polymer device operating according to in situ electrochemical doping and the formation of a light-emitting polymer p-n junction. This operating mechanism, ... -
Scanning Tunneling Microscopy Studies of Small Aromatic Molecules on Semiconductor Surfaces
(2012-07-18)Understanding the behaviour of molecules on a semiconductor surface is necessary if molecular self-assembly is going to be employed, with existing semiconductor technology, to create useful devices. Si(111)-7x7 is an ... -
The Scatter Dependence of the Spatially-Resolved Star Formation Main Sequence Relation
The scatter of the spatially-resolved star formation main sequence (SFMS) is investigated in order to reveal signatures about processes of galaxy formation and evolution. We have assembled a sample of 355 nearby galaxies ... -
Searching for Evidence of Optical Rectification: Optically-Induced Nonlinear Photovoltage in a Capacitor Configuration
(Optical Society of America, 2018-12-12)A current challenge in photonics is to design new versatile photodetectors based on optical rectification induced photo-voltage; these ones are more attractive than classical photodetectors because they do not rely on band ... -
Second Harmonic Generation of Chiral-Modified Silver Nanoparticles
(2013-10-01)Chiral molecules, which exist under enantiomers with non-mirror-symmetrical structures, have been the subject of intense research for their linear and nonlinear optical activities. Cysteine is such a chiral amino acid found ... -
Second-Order Nonlinear Optical Properties of Mexylaminotriazine-Functionalized Glass-Forming Azobenzene Derivatives
(Elsevier, 2016-07-27)The second-order nonlinear optical coefficients of thin films of mexylaminotriazine-functionalized azobenzene molecular glass derivatives were measured using second harmonic generation. The thin films were poled using a ... -
Self-Organization and Light-Induced Chirality in Azo-Glass Material
Azobenzene derivatives have been subject to many studies in the field of all-optical surface patterning due to their unique photoresponsive properties. Photoinduced mass movement of azobenzene enables inscription of surface ... -
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 ... -
The SHIVir Survey: A Dynamical Catalogue of Virgo Cluster Galaxies and their Scaling Relations
By virtue of its proximity and richness, the Virgo galaxy cluster is a perfect testing ground to expand our understanding of structure formation in the Universe. Here, we present a comprehensive dynamical catalogue based ... -
Silicon complexes in silicon doped calcium phosphate biomaterials
(2008-01-03)The silicon complexes in silicon doped calcium phosphate bioceramics have been studied using $^{29}$Si magic angle spinning nuclear magnetic resonance spectroscopy. The replacement of phosphorus by silicon in these materials ... -
Simple Unbiased Hot-electron Polarization-sensitive Near-Infrared Photo-detector
(American Chemical Society, 2018-03-06)Plasmonic nanostructures can generate energetic “hot” electrons from light in a broad band fashion depending on their shape, size, and arrangement. Such structures have a promising use in photodetectors, allowing high ... -
Simulation of Engineered Nanostructured Thin Films
(2009-04-01)The invention of the Glancing Angle Deposition (GLAD) technique a decade ago enabled the fabrication of nanostructured thin films with highly tailorable structural, electrical, optical, and magnetic properties. Here a ... -
Simulations of planet migration driven by the scattering of smaller bodies
(2007-09-17)Planet migration is an important part of the formation of planetary systems, both in the Solar system and in extrasolar systems. When a planet scatters nearby comet- and asteroid-size bodies called planetesimals, a significant ... -
Simulations of Scale-Free Cosmologies for the Small-Scale Cold Dark Matter Universe
(2009-09-26)Cosmological simulations show that dark matter halos contain a wealth of substructure. These subhalos are assumed have a mass distribution that extends down to the smallest mass in the Cold Dark Matter (CDM) hierarchy, ... -
Simulations of the Muon Veto and Background Expectations for the PICO500 Dark Matter Experiment
PICO500 is an upcoming dark matter experiment searching for Weakly Interacting Massive Particle (WIMP) dark matter. The experiment is a 500L bubble chamber and is currently in the design phase. This thesis presents simulations ... -
Solid-state showdown: comparing the photovoltaic performance of amorphous and crystalline small-molecule diketopyrrolopyrrole acceptors
(Elsevier, 2017-06-06)A novel glass-forming diketopyrrolpyrrole (DPP) derivative (DPP-glass) and a crystalline isoelectronic analogue were synthesized and their photophysical, electrochemical and photovoltaic properties were investigated. The ... -
Stellar Mass and Population Diagnostics of Cluster Galaxies
(2013-10-03)We conduct a broad investigation about stellar mass and population diagnostics in order to formulate novel constraints related to the formation and evolution of galaxies from a nearby cluster environment. Our work is ...