Defects in Self-Catalysed III-V Nanowires

Beschreibung

This thesis presents an in-depth exploration of imperfections that can be found in self-catalysed III-V semiconductor nanowires. By utilising advanced electron microscopy techniques, the interface sharpness and defects at the atomic and macroscopic scale are analysed. It is found that a surprising variety and quantity of defect structures can exist in nanowire systems, and that they can in fact host some never-before-seen defect configurations. To probe how these defects are formed, conditions during nanowire growth can be emulated inside the microscope using the latest generation of in-situ heating holder. This allowed the examination of defect formation, dynamics, and removal, revealing that many of the defects can in fact be eliminated. This information is critical for attaining perfect nanowire growth. The author presents annealing strategies to improve crystal quality, and therefore device performance.
This thesis presents an in-depth exploration of imperfections that can be found in self-catalysed III-V semiconductor nanowires. By utilising advanced electron microscopy techniques, the interface sharpness and defects at the atomic and macroscopic scale are analysed. It is found that a surprising variety and quantity of defect structures can exist in nanowire systems, and that they can in fact host some never-before-seen defect configurations. To probe how these defects are formed, conditions during nanowire growth can be emulated inside the microscope using the latest generation of in-situ heating holder. This allowed the examination of defect formation, dynamics, and removal, revealing that many of the defects can in fact be eliminated. This information is critical for attaining perfect nanowire growth. The author presents annealing strategies to improve crystal quality, and therefore device performance.
Nominated as an outstanding PhD thesis by the University of Warwick, UK Provides an accessible comprehensive review of semiconductor nanowires and defects in nanowires Showcases the defect structures found in nanowires including some never-before-seen defect configurations

Autor*in

James A. Gott

Themen in »Defects in Self-Catalysed III-V Nanowires«

III-V Defects Electron Microscopy Atomic Resolution Microscopy In-Situ Microscopy Scanning Transmission Electron Microscope Transmission Electron Microscope Heterostructures

Stimmen zu »Defects in Self-Catalysed III-V Nanowires«

Details

Link teilen