Study of mobile ionic charges by thermally stimulated currents in 4H-SiC MOS capacitors with thick SiO2 layers

Characterization of Deep Levels in n-type and Semi-Insulating 4H-SiC Epitaxial Layers by Thermally Stimulated Current Spectroscopy

Ge MOS Capacitors with Thermally Evaporated HfO2 as Gate Dielectric

We have investigated the characteristics of thermally evaporated hafnium oxide HfO2 films on germanium substrates. Surface roughness of the HfO2 film was studied by scanning electron microscopy. The presence of crystalline GeO2 was evident from X-ray diffraction results on as-deposited films. Capacitance–voltage C-V and current–voltage I-V measurements of the asdeposited metal-oxide semiconduct...

Thermally Stimulated Currents

Thermally stimulated current-curves in CdS platelets with slit electrodes change their character when the photoelectric gain-factor increases above one. Here the photocurrent remains essentially frozen-in up to temperatures at which marked thermal quenching sets in. A positive space charge region is assumed to be responsible for the frozen-in photocurrent. A reliable TSC-analysis of the trap di...

Thermally Stimulated Currents in Nanocrystalline

A thorough study on the distribution of defect-related active energy levels has been 18 performed on nanocrystalline TiO2. Films have been deposited on thick-alumina printed circuit 19 boards equipped with electrical contacts, heater and temperature sensors, to carry out a detailed 20 thermally stimulated currents analysis on a wide temperature range (5-630K), in view to evidence 21 contributio...

Reduction of structural defects in thick 4H-SiC epitaxial layers grown on 4° off-axis substrates