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.
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Showing 1 to 9 of 9 for “"deep traps"”.
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The effects of crosslinking byproducts on the electrical properties of low density polyethylene
… of the charges in the sample bulk due to shallow traps from the byproducts. These shallow traps assist the trapping process into deep traps when ac field is applied to the byproduct soaked LDPE. As a result, more charges trapped in deep traps were found in soaked LDPE compared to clean LDPE. In …
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Studies in the theory of solids
… features. Chapter II: We show that energies of deep traps associated with impurities in semiconductors are controlled by the Sand P orbital energies of the impurity atoms. First, the qualitative physics of a deep trap is worked out using a defect molecule model. For very deep traps the trap …
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Cu₂S/ZnCdS thin film heterojunction solar cell studies
… They were; electrical, spectral, capacitance and deep trap measurements. I-V measurements give important electrical parameters of the cells; cell efficiency, fill factor, short circuit current, open circuit voltage, shunt resistance and series resistance are reported. From a In(I<sub>SC</sub>) …
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Electrically active defects in novel Group IV semiconductors.
… of both the diamond and SiGe Schottky diodes. Deep level transient spectroscopy (DLTS) and Laplace DLTS were then carried out to investigate the deep electronic states in these devices. Scanning Electron Microscopy (SEM) was also used to investigate defects in the diamond samples. For the …
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Investigation of Ultracold Rubidium Atoms in a Pulsed Far off Resonance Trap
… of spatially large and/or energetically deep traps which are not presently accessible with table-top laser sources. Here, a mode-locked Nd:YAG laser is used as a pulsed laser source. Since the conservative optical dipole force trap does not cool Rb atoms, ultracold atoms must be loaded …
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Characterising Nanostructure and Understanding its Influence on Phase Stability and Performance in Halide Perovskites
… perovskites still exhibit a sizeable density of deep sub-gap non-radiative trap states, which create local variations in photoluminescence that fundamentally limit device performance. Understanding the origin and nature of these traps is critical to eliminate performance losses and yield devices …
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Effects of ion processing and substrate variables on electrical characteristics of GaAs
… orientation, and annealing. Transport and deep level transient spectroscopy (DLTS) results are presented for 50 keV Si-implanted and RTA (rapid thermal annealing) GaAs with (100) and (211) substrate orientations. Several electron traps are identified and their possible origins discussed. It …
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Particle export and flux through the Mesopelagic in the high-latitude north and South Atlantic
… bloom was tracked using Lagrangian sediment traps and thorium-234 disequilibria. A large pulse of diatom detritus was exported suddenly at the end of the bloom, probably upon impending Si-limitation. The particles were rich in transparent exopolymer particles (TEP, sticky polysaccharides …
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Charge-Storage mechanisms in polymer electrets
… electric field. COCs show shallow charge traps at 0.6 and 0.11 eV, characteristic for thermally activated processes. In addition, deep charge traps are present at 4 eV, characteristic for optically stimulated processes. PETP films exhibit a photo-current transient with a maximum that …