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 41 for “"PV cells"”.
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Solar Driven Photoelectrochemical Water Splitting For Hydrogen Generation Using Multiple Bandgap Tandem Of Cigs2 Pv Cells And Thin Film Photocatalyst
… CuIn1-xGaxS2 (CIGS2)/CdS thin film solar cells for photoelectrochemical (PEC) water splitting to produce very pure hydrogen and oxygen. Efficiencies obtained using CIGS2 have been lower than those achieved using CuInSe2 and CuIn1-xGaxSe2. The basic limitation in the efficiencies is …
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The Role of Parvalbumin Interneurons in Mouse Primary Visual Cortex during Visual Discrimination and Perceptual Learning
Parvalbumin-expressing (PV) cells are the most common class of inhibitory interneurons in the rodent cortex and play important roles in balancing cortical circuit activity and learning (Xu et al., 2010). PV cells are suggested to mediate feedforward inhibition and control gain modulation (Markram …
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Holographic Spectrum-Splitting Design for Micro-Concentrating Photovoltaic Applications
… efficiency by spatially assigning photons to PV cells with different bandgaps using optical filtering methods. This dissertation begins with a review of the background of holographic spectrum-splitting PV systems which includes models of solar illumination, the theory and models of PV cells, …
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Silicon cast wafer recrystallization for photovoltaic applications
… manufacturing silicon wafers for photovoltaic (PV) cells define the electrical properties of the wafer in a first step, and then the geometry of the wafer in a subsequent step. The geometry is typically defined by a combination of grinding and abrasive wire sawing. While mature, these processes …
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DESIGN, SYNTHESIS, AND CHARACTERIZATION OF NANOCOMPOSITES TO IMPROVE THE PERFORMANCE OF PHOTOVOLTAIC CELLS
… reliable nanocomposites for the photovoltaic (PV) devices. Photovoltaic materials utilized in our studies were synthesized using simple and inexpensive methods. The material properties were tailored and optimized to improve the optical absorption and charge transport properties. The PV cells …
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Contributions of distinct interneuron types to neocortical dynamics
… dynamics. Interneurons expressing parvalbumin (PV) and somatostatin (SOM) form two non-overlapping populations. Here, I describe computational, correlational (neurophysiological) and causal (optogenetic) studies testing the role of PV and SOM neurons in dynamic regulation of sensory processing. …
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Interfacial engineering and alternative device architectures for perovskite photovoltaics
… directly into electricity using photovoltaic (PV) devices provides a safe, renewable energy source for a sustainable future. Metal halide perovskites have established themselves as a transformative material for PV devices due to their unique combination of desirable properties including strong …
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Solar thermophotovoltaic efficiency potentials : surpassing photovoltaic device efficiencies
… for climate change. While photovoltaic (PV) cells, which convert sunlight into electrical energy, are becoming more widely used, they are limited in their ability to convert sunlight into electricity. One of the limitations of PV energy generation is caused by the fact that only a limited …
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Thermal analysis of a concentrating photovoltaic receiver
… and computational analysis for a photovoltaic (PV) receiver for the Science Applications International Corporation (SAIC) dish concentrator. During photovoltaic energy conversion, thermal energy is also generated which results in increases in cell temperature. However, as the cell temperature …
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Visual cortical plasticity : the role of parvalbumin expressing inhibitory neurons and abnormalities in models of neurodevelopmental disorders
… the participation of parvalbumin-expressing (PV+) GABAergic neurons in two forms of experience-dependent modification of primary visual cortex (V1) in adult mice: ocular dominance (OD) plasticity resulting from monocular deprivation and stimulus-selective response potentiation (SRP) resulting …
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Passive experience-dependent plasticity in mouse primary visual cortex
… but also the engagement of parvalbumin-positive (PV+) inhibitory interneurons. Herein we build upon this foundational work and show that SRP expression can be explained as the engagement of two different interneuron subclasses: somatostatin-positive (SOM+) and PV+ cells. Familiar visual stimuli …
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Organic photovoltaics and concentrators
… device architectures. In antenna organic solar cells, we utilize external energy transfer mediated by surface plasmon polaritons to increase the efficiency of existing organic photovoltaic devices limited in performance by the exciton diffusion bottleneck. This unique architecture is analyzed …
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Energy analysis and fabrication of photovoltaic thermal water electrolyzer and ion transport through modified nanoporous membranes
… “photovoltaic thermal water electrolyzer (PVTE)” – which consists of PV cells positioned on top of a planar micro-water electrolyzers in order to harness waste heat as a storable form of energy. The concept of PVTE has the outputs such as electricity and thermal storage, and also it …
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Development of an Efficient Solar Powered Unmanned Aerial Vehicle with an Onboard Solar Tracker
… over a conventional solar powered UAV with PV cells statically fixed to its wings. The final UAV had a wingspan of 3.2 meters, a length of 2.6 meters, and weighed 4.1 kilograms. Its solar panel provided a maximum power output of 37.7 watts. The predicted system performance, airframe drag, …
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Techno-economic comparison and environmental impact assessment of a hybrid photovoltaic thermal solar system and a thermosiphon solar thermal hot water system with electric back up element, under Windhoek, Namibian conditions
… heater (TS-SWH) and hybrid photovoltaic thermal (PVT) water heaters under Namibian conditions is limiting options available to decision makers on locally economic and opportune systems. This study compares the technical, economic aspects, and environmental impacts of TS-SWH and PVT water heaters. …
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Investigation of a novel solar photovoltaic/loop-heat-pipe heat pump system
… the widespread deployment of solar photovoltaic (PV) and thermal devices imminent, this research aims to resolve some engineering barriers to the existing solar photovoltaic/thermal (PV/T) technologies by incorporating an innovative loop heat pipe (LHP) and a typical heat pump. In addition, a …
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Hot spot detection and protection methods for photovoltaic systems
Photovoltaic (PV) systems are becoming more prevalent as countries around the world focus on integrating renewable energy resources into their power grids. Also, there is a need for power grids to become more intelligent and adaptive. As a result, PV systems require additional functionality, such …
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Three-dimensional metallic architectures for photonic and energy storage applications
… are useful for solar thermophotovotlaics (sTPV). This technology seeks to overcome losses in solar energy harvesting due to the broad spectral distribution of energies emitted by the sun. Single junction photovoltaic (PV) cells efficiently convert solar radiation to electricity in a narrowed …
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Structural and aesthetic design applications of flexible, thin-film solar cells to power off-grid tensile structures
… Moreover, silicon-based photovoltaic cells, due to their rigid nature, change the aesthetic of the surfaces on which they are placed and often only provide the singular function of harvesting energy. The current solar energy products function independently from the architecture on …
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Evaluation of alternative cooling techniques for photovoltaic panels
… in this area. The combined use of photovoltaic cells and thermoelectric modules is another thrust of this research. Two innovative systems are proposed and investigated including combined photovoltaic-thermoelectric power generation system (PV-TEG) and combined photovoltaic-thermoelectric …
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