Sökning: "schottky contact"
Visar resultat 1 - 5 av 29 avhandlingar innehållade orden schottky contact.
1. Microstructure of the Schottky contact : Ag/GaAs and Au/GaAs
Sammanfattning : .... LÄS MER
2. Schottky Contacs on Silicon Nanowires
Sammanfattning : This thesis demonstrates the effect of charge on Schottky barrier height for metal contacts at the end surfaces of silicon nanowires. It is shown, by measurements and analytical models, how the effective electron barrier is lowered by a positive charge introduced into an oxide embedding the wire. LÄS MER
3. Atom-Probe Field-Ion Microscopy of Electronic Materials
Sammanfattning : This thesis presents work in which atom-probe field-ion microscopy (APFIM) has been applied to two types of electronic materials. In the case of metal/GaAs contacts, the purpose was to characterise the microstructure of the contact interface, particularly the chemical composition variation across the interface. LÄS MER
4. Thermally stable electrical contacts to 6H silicon carbide
Sammanfattning : Silicon Carbide (SiC) are at present being developed for use in high temperature (≥ 500◦C) and high-power environments under which conventional semiconductors can hardly perform. Thermally stable electrical contacts are essential to the ability of SiC to function under such extreme conditions. LÄS MER
5. Design and characterisation of terahertz Schottky diode harmonic mixers
Sammanfattning : Efficient, compact, and reliable terahertz frequency converters preferably operating at ambient temperature are crucial for stabilising far-infrared optical sources. This thesis focuses on the design and characterisation of terahertz Schottky diode harmonic mixers for frequency stabilisation of quantum-cascade lasers. LÄS MER