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 84 for “"Photovoltaic Cells"”.
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Solar Energy Conversion and Control Using Organic Photovoltaic Cells
<p>Organic photovoltaic (OPV) cells are advanced, newly emerging technologies that are lightweight, mechanically flexible devices with highthroughput processes from low cost material in a variety of colors. Rathnayake et al. of Western Kentucky University have developed a nanostructure-based OPV …
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DESIGN, FABRICATION AND CHARACTERIZATION OF EPITAXIAL AND NON-EPITAXIAL THERMO-PHOTOVOLTAIC CELLS
Thermophotovoltaics (TPVs) have significant potential in efficiently converting thermal energy to electrical energy. These applications include conversion from internal combustion engines, small nuclear sources and even portable fuel-based sources. Group-III antimonide semiconductors have been …
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DESIGN, SYNTHESIS, AND CHARACTERIZATION OF NANOCOMPOSITES TO IMPROVE THE PERFORMANCE OF PHOTOVOLTAIC CELLS
… inexpensive and 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. …
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Surface plasmon polariton mediated energy transfer from external antennas into organic photovoltaic cells
… improvements in the performance of organic photovoltaic devices in recent years, the tradeoff between light absorption and charge separation efficiency remains pervasive; increasing light absorption by increasing the device thickness leads to a decrease in exciton diffusion efficiency and …
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Ultrathin mono-crystalline silicon photovoltaic cells with mechanically flexible and stretchable designs, and light-trapping structures
… (e.g., foldable and flexible display, flexible photovoltaic, epidermal electronics, and other systems) that can be integrated outside of conventional wafer-based electronics. With suitable choice of materials and design strategies, inorganic semiconductors (e.g., Si and GaAs) can be used on …
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Application of Pulsed D.C. Magnetron sputtering deposition for the component layers of CuInSe2 thin film photovoltaic cells
… CuInSe 2 (CIS), thin film solar cells. PDMS can use high plasma densities withlong term arc free operation for the reactive sputtering of dielectric materials and can producefilms with good crystalline properties, even at low substrate temperatures. However, thetechnique has not …
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Spectral Conversion of Light Using Cadmium Selenium Zinc Sulfide Core Shell Quantum Dots to Increase the Efficiency of Photovoltaic Cells
Photovoltaics harness energy emitted from the sun. When the sun's energy is absorbed by a photovoltaic cell array, photons of light are converted into current. The amount of current produced by a photovoltaic cell is calculated by the difference between the energy of the incoming photon and the …
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A study of the creation and characterization of nitrogen doped CuInSe2 (CIS:N), as a potential improved back contact material for CdTe and Cu(IN_xGA_1-x)Se2 photovoltaic cells
Nitrogen is incorporated into CuInSe2 (CIS), and other related materials, using a scalable, commonly used, technique. The growth characteristics, film morphology and electronic properties of these N doped materials, as it is affected by nitrogen, are studied, both in films grown with nitrogen, and …
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Optical Antenna Photovoltaics & Making Metallic Nano-rods
… is a growing demand for cheap, high efficiency photovoltaic cells. Of the many emerging solar harvesting technologies, a concept that has not been widely explored is that of optical antennas. In 1972 Bailey et al.[1] explored scaling down of antenna technology to match the solar spectrum. A …
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Experimental and theoretical investigations of a new integrated solar tower system for photocatalytic hydrogen and power production
… system employing a photocatalytic reactor and photovoltaic cells in a cavity receiver of a solar tower system is proposed. A fully functioning lab scale system, capable of handling continuous flow processes, is built, and experiments are conducted to investigate the behaviour of this system. …
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Modeling and fabrication of high power density microscale thermophotovoltaic devices
… decade or two in the potential of using thermophotovoltaic (TPV) systems for direct conversion of thermal energy into electricity. The invention of TPV systems can be traced to almost 50 years ago, but systems developed over the following 2-3 decades lacked in efficiency and power density. …
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Improving solar thermal receiver performance via spectral and directional selectivity
… aerogel receiver that collects electricity from photovoltaic cells and heat is shown to potentially achieve higher efficiency than photovoltaics or a thermal receiver alone. A macroscale reflective cavity is demonstrated as a method for achieving directional selectivity in solar absorbers, and …
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Charge recombination in organic small-molecule solar cells by Jiye Lee.
… the power 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 …
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Quantum efficiency and fission rate in tetracene
Using singlet fission in a photovoltaic cell, the theoretical energy conversion efficiency limit is larger than the Shockley-Queisser limit due to two excitons produced with one incident photon. In a singlet fission material, an absorbed photon excites a singlet exciton and then split into two …
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Model of reflectance of thermophotovoltaic cell and cold plate
… cold plate, and mounted multi-junction photovoltaic cells, is studied in the context of a thermal energy grid storage system. The emitter is modeled as a black body emitter. Improving the efficiency of the system requires high reflectance below the bandgap energy of the cells, and high …
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A systems analysis of solar power potential in coming decades
… in the future with solar energy, in particular photovoltaic cells, filling the bulk of the energy generation.
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Theoretical And Spectroscopic Studies Of Molecular Systems For Charge Transfer And Energy Storage And Transfer
… molecular electronics, and solar voltaic cells. Characterization of the photophysical properties of new molecular systems for these applications has emerged as an important field of research. Many molecular building blocks have been developed and understanding the properties of these …
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Enhancing tractability of mixed-integer nonlinear programming models: case studies in energy and sports
… a microgrid consisting of diesel generators, photovoltaic cells and lithium-ion batteries; (ii) dispatch of a grid-scale hybrid system consisting of concentrated solar power and thermal energy storage, combined with photovoltaics and battery storage; and (iii) a series of models to determine …
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