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 11 of 11 for “"Dopant Distribution"”.
-
Bulk Growth of Semiconductor Crystals in a Magnetic Field: A Study of Dopant Transport
Our model for the unsteady transport of a dopant during the entire period of time required to grow a crystal assumes that the externally applied magnetic field is sufficiently strong that inertial effects and convective heat transfer are negligible. We divide the semiconductor melt into (1) …
-
Particle Size Dependence on the Luminescence Spectra of Eu3+:Y2O3 and Eu3+:CaO
… of the bulk oxides. The particle size distribution and dominant particle diameters of the nanocrystals were determined by transmission electron microscopy. The particle size dependency results of Eu3+:Y2O3 revealed three distinct phases: (1) the sharp lines of the monoclinic Y2O3 were …
-
Chemical Vapor Deposition Grown Pristine and Chemically Doped Monolayer Graphene
… structures via STM/S. We found that both N and B dopants substitionally dope graphene films, and contribute electron and hole carriers, respectively, into graphene at a rate of approximately 0.5 carrier/dopant. Apart from this, we have made comparisons between N- and B-doped graphene films in …
-
Depth Profiling in Thin Films via Waveguide Spectroscopy
… observing Raman spectroscopic signals due to the dopant from different waveguide modes. These signals contain information on the dopant distribution because the excitation spatial distribution is different from each mode.
-
Femtosecond-laser irradiation as a platform for tailoring the optoelectronic properties of silicon
… Si-III, and TEM investigations of the spatial distribution of the amorphous silicon, we report that pressure-induced phase transformations are closely coupled to micron-scale surface texturing. Next, I identify the pressure generation mechanisms responsible for the pressure-induced phase …
-
Determining rare earth dopant concentrations in optical fibres and waveguides
… is dependent on many parameters, including the dopant concentration. Accurate modelling of such devices require knowledge of the dopant concentrations and/or dopant distribution. Current techniques for determining dopant concentration are applicable to bulk samples and fibre preforms but can not …
-
Simulation of implantation and diffusion processes for electro-thermal microcantilevers
… characteristic of these probes is the spatial dopant distribution that gives these devices the required electrical and thermal functionality. In this work, we have identified the design goals for these probes and determine the corresponding implantation and diffusion parameters for the doping …
-
Multi-Scale Model of the Stability of a Laterally Heated Liquid Bridge Under the Influence of an Axial Magnetic Field
… defects in the crystal lattice, and nonuniform dopant distribution, effectively ruining the properties of the crystal. This study investigates the use of magnetic fields in suppressing these instabilities. When a crystal is grown in the presence of a magnetic field, electric currents are …
-
A new inverse-modeling-based technique for sub-100-nm MOSFET characterization
… (2D) and three-dimensional (3D) redistribution of dopants, due to thermal diffusion during the fabrication process, strongly determine the short channel effects, which ultimately limit device operation and performance. In order to suppress short-channel effects, extensive use of …
-
Graphics Processing Unit-Accelerated Numerical Simulations and Theoretical Study of Qubit Dynamics in Realistic Systems
… between disorder conferred by randomness in dopant distribution and electron-electron interaction originating from the high doping concentration. It is possible to electrostatically isolate a single donor from the large ensemble of dopants. I investigate how such a complex system is expected …
-
Design and synthesis of Ni-rich and low/no-Co layered oxide cathodes for Li-ion batteries
… synthesis. In Chapter 2, we investigate the dopant redistribution, phase propagation, and local chemical changes of layered oxides at multiple length scales using a multielement-doped LiNi0.96Mg0.02Ti0.02O2 (Mg/Ti-LNO) as a model platform. We observed that dopants Mg and Ti diffuse from the …