Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 44 for “"Electron injection"”.
-
Electron Injection-induced Effects In Iii-nitrides: Physics And Applications
This research investigated the effect of electron injection in III-Nitrides. The combination of electron beam induced current and cathodoluminescence measurements was used to understand the impact of electron injection on the minority carrier transport and optical properties. In addition, the …
-
Hot electron injection effect and improved linearity in type-I/II DHBT for millimeter-wave mixed signal circuit applications
… with epitaxial growth on this substrate. The hot electron injection effect is incorporated to improve gain and speed by using the AlInP/GaAsSb/InP material system with a Type-I/II energy band alignment. Chapter 1 of this work gives a brief overview of the motivation to conduct this research and an …
-
NONLINEAR AND ULTRAFAST OPTICAL STUDIES OF INTERFACIAL PROCESSES IN PHOTOVOLTAIC NANOMATERIALS
… conversion efficiency, the mechanism of the electron dynamics driving these systems remains controversial. This stems in part from the fact that the experimentally deduced time constants, which are characteristic of such systems, are only ever extracted from phenomenological models and …
-
Investigation on nanostructured solar cells
… flame aerosol synthesis and flow-limited field-injection electrostatic spraying (FFESS). The new method provides good stability and reproducibility, demonstrating the generation of TiO2 nanoparticles with more flexibility in the control of their properties. The charged droplet size controlled by …
-
Physical and Electrical Properties of Hot -Carrier Degradation of Silicon *Mos Transistors Processed in Deuterium and Hydrogen
… trap generation resulting from ""hot-carrier injection."" New experiments for the deuterium isotope effect for hot-hole and hot-electron injection have been performed to probe the mechanism for the interface trap generation in n-MOS transistors in the presence of hot-hole and hot-electron …
-
Investigations of the physical properties of photoemission polarized electron sources for accelerator applications
… the onset of space charge growth of a 100 keV electron beam passing through the Illinois/CEBAF polarized electron injection system was studied by measuring the beam emittance as a function of current. Finally, the thermal properties of GaAs were investigated by measuring the beam emittance as …
-
Modeling and suppression of latchup
… on the bias conditions and layout geometry, electrons or holes can trigger latchup. Latchup hazards caused by holes and electron injection are studied. The roles of guard rings are investigated. The impacts of N-type and P-type guard rings are reported. The guard-ring efficacy under …
-
Improved catalysts with properties controlled by semiconductor band engineering
… a CO oxidation test reaction to demonstrate the electronic influence of the TiO2 support on Pt catalytic activity. Over a range of TiO2 film thickness corresponding to carrier concentrations that varied by a factor of around 10, the reaction rate coefficient kCO in excess CO increased by about …
-
Ballistic electrons : microscopy, spectroscopy, devices and luminescence
… theoretically model and experimentally measure electronic systems which employ ballistic electron emission. First, a Monte-Carlo framework for simulating electron injection from a tunnel junction emitter into a semiconductor collector is presented in detail and a few applications of this theory …
-
Studies of trap generation in silicon-dioxide and electromigration in aluminum thin films
… at high electric fields are studied by avalanche electron injection. A comparison between a 9%-HCl-oxide MOS capacitor and a dry-oxide MOS capacitor shows that HCl decreases the hydrogenation rate of the boron acceptor in the silicon surface layer and increases the density of the peaked interface …
-
Interband and intraband optical studies of CdSe colloidal nanocrystal films
… measurements on charged CdSe nanocrystals. The injection of electrons into quantum confined states is confirmed by monitoring changes in the visible and infrared absorption spectra. Interestingly, the response is observed only in the nanocrystals that have been chemically treated with sodium …
-
Numerical models of Hall thruster ionization oscillations
… of macro-particle size, floating body potential, electron injection region, ion time step size, grid refinement, heavy particle mass reduction, and an artificial permittivity factor. These studies help to determine the parameters that will produce accurate simulations in the future, and identify …
-
generation and transport of high-current relativistic electron beams in high intensity laser-solid interactions
… ultra-high intensity laser-driven relativistic electron beams in overdense plasma is investigated experimentally and numerically. The fast electron beam is experimentally diagnosed by means of a 2D Cu Kα imager and the TNSA-generated proton beam. Analytical models together with a 3D hybrid-PIC …
-
Studies of interaction of dye molecules with TiO2 Brookite clusters for application in dye sensitized solar cells
… Our findings showed strong binding ability, good electronic coupling, efficient charge separation, spontaneous electron injection and good spectral properties upon adsorption of the dye molecules to brookite TiO2 semiconductor clusters. Our findings on the optical absorption spectra of ruthenium …
-
Investigation of dye-sensitized solar cell performance with single chirality semiconducting carbon nanotubes
… (CNTs) allow a selection of band-gap and electron mobility. Separating a specific chirality from a mixture of carbon nanotubes remains challenging task. Among separation techniques, one of the most promising is size-exclusion gel chromatography. Although SWNTs separated by this technique …
-
Limitation of lithium fluoride (LiF) properties for passivation layer in organic solar cells application
… as a buffer layer and coupling layer to enhance electron injection. Lithium Fluoride can also enhance metal cathode performance, characterize Lithium fluoride (LiF) thickness and test LiF as interlayer between active layer and metal layer by using sol�gel method to improve metal cathode …
-
Investigation of transport mechanisms for n-p-n InP/InGaAs/InP double heterojunction bipolar transistors
… and the tunneling theories in investigating the injection mechanisms at the e-b heterojunction interface. The diffusion transport is considered first for electron injection from the emitter into the base. The thermionic emission is applied properly at the point of maximum potential energy as one …
-
Highly tunable room temperature quantum cascade lasers
… been carefully designed to maintain efficient electron injection and reduce thermal backfilling at high temperatures. This allowed wavelength emission at ~3.3µm in pulsed mode at room temperature. A system was developed which could drive the laser by delivering an electrical pulse as brief as …
-
Density functional theory study of adsorption of cronconate dyes on TiO2 Anatase (010) and (100) surfaces
… two croconate dyes (CR1 and CR2), one with an electron donating methyl group (CR1) and the other with an electron –withdrawing caboxyl group (CR2). The geometric, electronic and optical properties of these dyes were compared. The adsorption behaviour of the two dyes on (010 and 100) anatase …
-
Electrodeposited Ni/Ge and germanide schottky barriers for nanoelectronics applications
… barriers have found numerous applications in nanoelectronics. The work presented in this thesis focuses on the improvement of a few of the relevant devices using electrodeposition of metal on Ge for Schottky barrier fabrication. This low energy metallisation technique offers numerous advantages …
Page 1 of 3