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Showing 1 to 14 of 14 for “"Current-voltage characteristic"”.
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High vacuum system and instrumentation for measuring the derivative of the current-voltage characteristic of a Langmuir probe
… for obtaining the first derivative of the current-voltage characteristic of a Langmuir Probe, which is needed to determine the electron speed distribution in rare gases. The theory behind using a lock-in amplifier differentiator to obtain the derivative of the I-V characteristic of a …
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A study of optical properties and current emission processes of gas phase field ionization sources
… Also, the first theoretical analysis of the current generation mechanism is presented that explains both the current-voltage characteristic and the total current of the GFIS with reasonable agreement with experiment. The optical properties in the emission diode region are derived from the ray …
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Nonlinear transport in semiconductor superlattices
… ladder resulting from the spontaneous bias. The current-voltage characteristic without time-dependent driving exhibits multistability for sufficiently large magnetic or self-consistent electric fields, and spontaneous current generation at zero bias is predicted for certain nonequilibrium ""hot"" …
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In-situ measurements of the Liquid-Phase Sintering of Zinc Oxide
… several additive oxides show highly non-ohmic current-voltage behavior similar to the Zener diodes. The devices act as an insulator up to a certain electrical field called the breakdown field (EBR) but change into a highly conducting one just above it. Below and above the breakdown field they …
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The gridded electromagnet probe
… mirror force and thereby on the electromagnet current, which then allows for the construction of a compact probe that can be inserted inside the plasma chamber. An analysis of the effects of space charge inside the grid-collector cavity revealed that the size of the probe's entrance aperture, …
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Investigation of the interaction of high current relativistic electron beams with electromagnetic fields
The results obtained in the investigation of high current relativistic electron beams produced by explosive electron eMission from the flare cathode plasma of a high voltage, cold-cathode, field-emission diode are reported. In addition, the production of high power ( ~100kW) microwave radiation …
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Synthesis and Characterization of CdSe/ZnS Core/Shell Quantum Dot Sensitized PCPDTBT-P3HT:PCBM Organic Photovoltaics
… fifteen minutes at 110° C, 140° C, and 170° C. Current-voltage characteristic curves v and optical density data were taken before and after the anneal step. Finally, surface characterization was conducted with atomic force microscopy and electrostatic force microscopy. When compared to the …
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Quasiparticle and Phonon Transport in Superconducting Particle Detectors
… phonons into the device structure, whilst the current-voltage characteristic of a second junction is monitored for a response to the injected quasiparticles/phonons. Using this type of experimental set-up, I have measured the transport of non-thermal equilibrium quasiparticles in an epitaxial …
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Synthesis of large-area two-dimensional materials for vertical heterostructures
… optical applications. However, the quality of currently available synthetic materials is not sufficient to realize many of these applications. Further, the impact of defects and layer-to-layer interactions on the electronic behavior of heterostructures is not well understood. Several synthesis …
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Novel applications of the Josephson Effect: Ferroelectric Characterisation and Capacitively Shunted Grain Boundary Junctions
… capacitor, to make a junction with a hysteretic current voltage characteristic operating at high temperatures. A hysteretic junction with a McCumber parameter of 1.01 at 72.3K, with a critical current of 451mA and a resistance of 0.56W was achieved for a junction shunted with a 150mm2 external …
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Quantitative Carrier Transport in Quantum Dot Photovoltaic Solar Cells from Novel Photocarrier Radiometry and Lock-in Carrierography
… in CQDs, various carrier drift-diffusion current-voltage (J-V) analytical models and new concepts including the imbalanced carrier mobilities, reversed Schottky barrier, and double-diode model were developed to quantitatively interpret carrier transport and J-V characteristics in CQD solar …
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High Voltage Bias Testing And Degradation Analysis Of Photovoltaic Modules
… modules. The first aspect addressed the high voltage bias testing and data and degradation analysis of high voltage biased thin film photovoltaic modules. The second aspect addressed the issues of reliability and durability of crystalline silicon module. Grid-connected photovoltaic systems …
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A study of superconducting lead-indium alloys subjected to hydrostatic pressure using the electron tunneling technique
… the superconductor. Measurement of the tunneling current-voltage characteristic then enables one to determine the electron density of states. Since (at T = 0 K) no current can flow until a voltage greater than the energy gap is applied to the junction, tunneling also gives the energy gap. The …
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Elektrische Modellierung und Vermessung von farbstoffsensibilisierten Solarzellen , Ein analytisches Modell zur Berechnung der stationären Kennlinien und Impedanzen
Es wird ein analytisches Modell der farbstoffsensibilisierten Solarzelle <br>(FSZ) entwickelt, welches erlaubt, aus den physikalischen Parametern der <br>FSZ (Zelldicke, Diffusionskonstanten und mittlere Lebensdauern der <br>Ladungsträger, Elektrolyt-Konzentration, etc. ...) sowohl das …