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 93 for “"short-circuit current"”.
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Advanced Faraday cage measurements of charge, short-circuit current and open-circuit voltage
… above atmospheric pressure caused both positive current and negative current pulses with the negative pulse larger than the positive pulse. A pressure decrease of more than 10psi below atmospheric pressure also caused both positive current and negative current pulses with the positive current …
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Investigation on no-load mechanical endurance and electrical degradation of a circuit breaker model under short circuit current interruption
The demand on reducing circuit breaker failure, extending service life, increasing equipment reliability and lowering the related operating and maintenance costs are nowadays of prime importance for the electricity supply network. According to statistics, the major failure mode is originated from …
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Solving Series Resistance Problems In GaSb Thermophotovoltaics with Graphene and Other Approaches
… under AM 1.5 conditions. These devices displayed short circuit current values as high as 40 mA/cm2 but were found to have poor series resistance. The parasitic resistive characteristics were factored out of the measured cell data and it was found that the photocurrent for the fabricated devices …
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Nanoimprint lithography for light trapping applications in solar cells
… (Si) thin-film solar cells is studied. The short-circuit current enhancement for cells with a back reflector is 34% and 30% with a multi-disperse array and the mono{u00AD}dispersed array respectively, compared to 13% enhancement due to the reflector alone. The better performance of …
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Nanoimprint lithography for light trapping applications in solar cells
… (Si) thin-film solar cells is studied. The short-circuit current enhancement for cells with a back reflector is 34% and 30% with a multi-disperse array and the mono{u00AD}dispersed array respectively, compared to 13% enhancement due to the reflector alone. The better performance of …
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Ultra-thin GaAs Photovoltaics for Space Applications
… wafers. This lifted-off design produced an AM0 short circuit current of 15.35 mA/cm² and an AM0 efficiency of 9.08%, a 68% increase over the planar on-wafer equivalent. Optical simulations confirmed the contributions of Fabry-Perot and waveguide modes to this current increase. Simulated …
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Optical Modeling of Solar Cells
… cell. The Q.E. allows the calculation of the short circuit current generated by the solar cell and the R and T allow for the calculation of the reflection loss of the solar cell. The analytical tool used in this thesis is based on such an approach and is used to evaluate the compatibility of …
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The novel role of epidermal growth factor (EGF) in the regulation of ion channels in the calu-3 submucosal cell line
… consequently not delivered to the cell membrane. Currently, the effect of growth factors such as epidermal growth factor (EGF) on ion transport in the airway has not been previously researched and is consequently unknown. Therefore the aim of this thesis is to determine (i) if EGF has an effect on …
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Plasma Treatment of Zinc Oxide Thin Film and Temperature Sensing Using the Zinc Oxide Thin Film
… and a ultra-violet photodiode as light detector. Short circuit current of the photodiode was measured over a range of the zinc oxide film’s temperature. The short circuit current decreased linearly with the increase of the temperature and the sensitivity was ~0.1 μA/°C.</p>
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Characterisation of radiation effects in ultra-thin GaAs solar cells for space applications
… both continuous wave and time-resolved, and current-voltage measurements. It is demonstrated that the preservation of short-circuit current up to high dose in ultra-thin solar cells can be attributed to the carrier lifetime remaining greater than the time taken for carriers to traverse the …
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Investigation of CZTSe Solar Cell with ZnS, ZnSe and In2S3 as Buffer Layers
… reflectance, transmittance and maximum short circuit current. Among today’s thin film technologies CIGS and CdTe are profound but the toxic nature of Cd, and hard to mine elements used in CIGS, like In, Ga make the commercial level production not feasible. The use of CZTSe which is …
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Optical Investigations of Cd Free Cu<sub>2</sub>ZnSnS<sub>4</sub> Solar Cells
… is calculated and used to calculate the maximum short circuit current. A comparison of the solar cell performance in simulations using In<sub>2</sub>S<sub>3</sub>, ZnS, ZnSe and conventional CdS revealed an increase in QE while using ZnS, ZnSe and In<sub>2</sub>S<sub>3</sub> as buffer layers.
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Nanocarbons as charge carriers in organic solar cells
… OPVs to improve PCE. It has been found that the shorted MWNTs provide larger surface area for exciton dissociation and better phase separation and probably lead to less charge recombination. Therefore, they show higher PCE. Functionalized nanodiamonds (ND) are also introduced to C60 to synthesize …
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Highly Transparent, Self-cleaning, and Antireflective Nanoparticle Coatings
<p>Current solar panel technologies require a sheet of glass to serve as both mechanical support and to protect the cells from the environment. The reflection from the glass sheet can reflect up to 8% of the incident light, reducing the power output of the panel. Antireflective coatings can be used …
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Visible and Infrared Light Detection Using 2D Materials
… were shown to exhibit large improvements in the short circuit current and open circuit voltage due to antireflection coating effects, surface doping, and surface trap passivation. A single absorber solar cell with an open circuit voltage (Voc) of 380 mV and short circuit current density (Jsc) of …
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Optimization of PEDOT: PSS thin film for organic solar cell application
… inconvenient production process and material shortness. In this work, P3HT: PCBM bulk-heterojunction devices were produced by spin coating organic layers onto ITO coated glass in air, and deposited it with an Au layer as top metal electrode. Inverted devices were fabricated with and without …
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Design and fabrication of nitride-based solar cells and integration for tandem cell
… a backside reflector yields an increase in the short circuit current density of up to 20%. This demonstration of transferred InGaN-based solar cells on foreign substrates while increasing performance represents a major advance toward lightweight, low cost and high efficiency photovoltaic …
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Análise de zeros atrasados em unidades offshore
High asymmetric currents are expected to appear in electrical systems, whenever a short circuit occurs somewhere nearby electric generators buses. In the case of offshore production platforms, the so called asymmetry, along with other specific conditions, may give rise to the so called “delayed …
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Interplay of optoelectronic properties and solar cell performance in multidimensional perovskites
… performance properties such as efficiency, open-circuit voltage, and short-circuit current. Hence, there is a trade-off between having more stable perovskite and high-performance cell in using large A-site organic cations.
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Mechanisms of Prostaglandin-Stimulated Recovery of Mucosal Barrier Function in the Ischemia-Injured Porcine Intestine: Role of Intestinal Ion Transport
… ileal mucosa was mounted in Ussing chambers. Short circuit current (Isc) and transepithelial resistance (TER) were measured in response to PGE2 and pharmacologic inhibitors of epithelial Cl- channels. Overall, results from these studies demonstrate that ClC-2-mediated intestinal Cl- secretion …
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