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 20 of 33 for “"charge collection"”.
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Optimization of charge collection efficiency in MSM photodetector
… photo-detector have been analyzed for enhanced charge collection through electromagnetic field analysis. Plots of the electric field amplitude as it propagates from the constricted grating region to a larger crosssection in the active region have been studied for comparison. This study shows …
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Study and analysis of surface charge collection and emission spectrum of plasma ashing process
… an important observation on the total surface charge collection using quantox wafers through the measurement of surface voltage (Vs) on wafer surface with contactless Kelvin Probe for changes in parameters during plasma ashing. In this report, it is covered on the plasma characteristics and …
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Charge Collection Studies on Integrated Circuit Test Structures using Heavy-Ion Microbeams and MEDICI Simulation Calculations
Ion induced charge collection dynamics within Integrated Circuits (ICs) is important due to the presence of ionizing radiation in the IC environment. As the charge signals defining data states are reduced by voltage and area scaling, the semiconductor device will naturally have a higher …
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3D detectors for synchrotron applications
… resulting in a low depletion voltage, fast charge collection and low charge sharing. These detectors have a couple of promising applications. Their fast charge collection and low depletion voltage should make them very radiation-tolerant. So, they could be used for future particle physics …
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Charge recombination in organic small-molecule solar cells by Jiye Lee.
… conversion efficiency in organic solar cells, charge recombination loss needs to be minimized. First, we perform transient absorption spectroscopy to study the charge recombination dynamics of thin film bulk heterojunction of the archetype organic solar cell molecules, copper phthalocyanine …
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A Power-efficient Radio Frequency Energy-harvesting Circuit
… circuit, from receiving antenna to the point of charge collection. The circuit employs a custom-designed antenna based around Koch fractal loops, selected for their small physical size, good multiband behaviour and ease of size scalability, as well as a power-efficient seven-element Greinacher …
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Nanocomposites for Enhancing Current in Organic Solar Cells
The enhancement of charge collection in organic photovoltaics by using nanocomposite materials is investigated. Two such approaches are detailed in this thesis. Chapter 1 addresses the addition of metal nanorods to the PEDOT layer of an organic solar cell in an attempt to focus incident light for …
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Radioactive source measurements in a liquid xenon time projection chamber
… to contribute to such research with a study of charge-collection energy resolution, with radioactive source measurements in a liquid xenon time projection chamber (TPC).
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GaN sensorių optinio ir elektrinio atsako charakteristikų tyrimas /
… transient techniques, respectively. The charge collection efficiency (CCE) has been examined by surface and edge profiling of carrier drift transients by using transient current pulsed technique. These profiles were compared for the pristine and neutron irradiated sensors. A decrease of …
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The development of the national accelerator centre proton microprobe as an analytical tool in geochemistry
… and the assessment of the effects of incomplete charge collection in the detector.
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Multi-pixel charge sharing energy reconstruction (MCSER) algorithm with application in small-pixel semiconductor detectors
… degradation partially due to incomplete charge-collection. In this paper, we discuss a multi-pixel charge sharing energy reconstruction (MCSER) algorithm that could be used to enhance the spectral performance of the small-pixel CdTe/CZT semiconductor detectors. This algorithm, by …
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Development of Small-Pitch, Thin 3D Sensors for Pixel Detector Upgrades at HL-LHC
… distribution, lower trapping probability, faster charge collection capability, lower power dissipation, and lower inter-pitch charge sharing. Since several years, FBK has developed 3D sensors with a double-sided technology, that have also been installed in the ATLAS Insertable B-Layer at LHC. …
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Mesoporous ZnO/TiO2 nanowire heterojunction photo-anodes for quantum-dot sensitised solar cells
… reducing recombination losses and enhancing charge collection efficiency. ZnO NWs may be grown at lower temperatures and offer greater flexibility in morphology control, allowing for tailored architectures that optimise light harvesting and QD dot loading. This combination of excellent charge …
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4H silicon carbide particle detectors: study of the defects induced by high energy neutron irradiation
… always comparing with the un-irradiated one. The charge collection efficiency degradation of Schottky detectors induced by neutron irradiation was related to the increasing concentration of defects as function of the neutron fluence.
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Single event upset hardened CMOS combinational logic and clock buffer design
… strike on semiconductor device may lead to charge collection, which may manifest as a wrong logic level causing failure. Soft errors or Single Event Upsets (SEU) caused by radiation strikes are one of the main failure modes in a VLSI circuit. Previous work predicts that soft error rate may …
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Experimental study of electrostatic aerosol filtration at moderate filter face velocity
… were conducted in various combinations of charge and neutralized filter media with aerosolized particles possessing the Boltzmann charge distribution or zero charge. Collection efficiency of the charged FiltreteTM media was significantly higher than the FiltreteTM which had been charged …
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Development of an MR-compatible SPECT system based on energy resolved photon counting detectors
… collimation apertures. Besides this, a detailed charge collection inside strong magnetic field is developed by J.W Tan in our group, and a MR correction model based on this model is used to reconstruct SPECT image inside strong magnetic field. Detailed system design and experimental procedures …
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Fabrication of nanorod TiO2/CU2O heterostructure thin film
… area of the heterostructure for efficient charge collection. Therefore, nanorod structure has been suggested to overcome this problem. Nanorods provide stable electrodes and larger surface area for charge transfer reactions. This approach will attribute the enhancement desirable absorption …
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Development and characterisation of Monolithic Active Pixel Sensor prototypes for the upgrade of the ALICE Inner Tracking System
… um imaging sensor technology to study noise, charge collection efficiency and signal-‐to-‐noise ratio. This work presents the main characterization results obtained from the measurements performed on two small scale prototypes (MIMOSA-‐32 and MIMOSA-‐32ter) with X-‐ray sources and beams …
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The development of MRI-compatible SPECT system
… it is crucial to develop a precise model of the charge- collection behavior for CdTe detectors operated in strong magnetic field for reconstruction. In this study, a comprehensive Monte Carlo model has been developed for predicting the response function of the small-pixel CdTe detectors operated …
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