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 501 for “"solar cell"”.
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Nanorod solar cell
… an eco-friendly and renewable energy technology. Solar cells, with their ability to convert the free and gigantic energy supply of the sun into electricity, are one such attractive choice. In this thesis, a study of the use of new technologies for enhanced solar cell performance based on …
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Exciton behaviour at organic solar cell interfaces
… in the production of flexible and cheap solar cells. Polymer OPVs are typically composed of a blend of a semiconducting electron donating poly- mer with an electron accepting fullerene derivative. This blend leads to a high donor-acceptor interfacial surface area where excitons are split …
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Nanostructured Back Reflectors for Solar Cell Application
… promising alternative to crystalline wafer based solar cells but back reflectors are needed to increase the absorption in these cells. Nano texturing is one of the widely used methods for fabricating solar cell back reflectors. Peak height and angle distribution are key parameters needed to …
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Patterned quantum dots for solar cell applications
The theoretical efficiency limit of current solar cell technology, called the Shockley-Queisser limit, is about 30%. Research is underway to overcome this limit using new types of nano-sized solar cells. Quantum dots offer the potential to increase the efficiency of solar cells through carrier …
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Assessment of the micromorph tandem solar cell
… has begun to be realized. The micromorph tandem solar cell shows great promise as it boasts both high efficiency and low cost. The device consists of an amorphous top cell and a microcrystalline bottom cell. Optimization through high-rate silicon deposition, light trapping, and film growth make …
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Advanced Electron-Beam Techniques for Solar Cell Characterization
… of advanced electron-beam based techniques for solar cell characterization. Firstly, the advantage of the subsurface imaging of scanning electron acoustic microscopy (SEAM) was utilized to characterize the structural properties of saw-damage-induced defects and the non-destructive nature of SEAM …
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One-Dimensional nanostructured polymeric materials for solar cell applications
… and their application in photovoltaic solar cells. Zinc oxide (ZnO) with one-dimensional and flower-like morphology was also prepared by microwave irradiation and used as electron acceptors in photovoltaics devices. The morphological, structural, spectroscopic and electrochemical …
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Simulation of polymer solar cell characteristics by amps-1d
Simulation of polymer solar cell characteristics is presented in this study. The solar cells are made of materials such as the following: Poly (3-hexylthiophene): [6, 6]-phenyl C61- butyric acid methylester (P3HT: PCBM) and poly[2,1,3-benzothiadiazole-4,7-diyl[4,4- …
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Influence of defects and impurities on solar cell performance
Multicrystalline silicon (mc-Si) solar cells exhibit high impurity content and higher density of crystal defects such as grain boundaries, dislocations, stacking faults and impurity precipitates. Even though the effect of dislocations on mc-Si solar cell performance has been studied, a severe lack …
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High temperature investigations of crystalline silicon solar cell materials
Crystalline silicon solar cells are a promising candidate to provide a sustainable, clean energy source for the future. In order to bring about widespread adoption of solar cells, much work is needed to reduce their cost. Herein, I discuss the development of a new experimental technique to …
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Cu₂S/ZnCdS thin film heterojunction solar cell studies
Cu₂S/CdS solar cells have been studied extensively for the past two decades due to their potentially high efficiencies per unit cost. The operation and characteristics of Cu₂S/CdS solar cells are fairly well understood. However, the properties of the newer Cu₂S/ZnCdS cell type are not well …
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Impact of secondary barriers on CuIn1-xGaxSE2 solar-cell operation
Thin-film solar cells based on CuInSe2 (CIS) absorber with a band gap of Eg = 1.0 eV and also based on CuIn1-xGaxSe2 (CIGS) alloy absorbers with a band-gap range of Eg = 1.0 - 1.67 eV are investigated in this work. Intermediate "buffer" semiconductor layers in p-n junctions of CIGS solar cells …
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Integrated Tandem Dye Sensitized Solar Cell (DSSC)-Lithium Ion Battery
… types of energy harvesting technologies such as solar, thermal and wind require excess energy to be stored in batteries, which further adds to the complication and increase in cost to the overall renewable energy system. Integrating the generation and storage of solar energy in a single device …
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From Process to Circuits: New Perspectives to Solar Cell Design
… sources increased over the last two decades, solar cells have proven to be strong candidates against the fossil fuels. From an economic perspective, in order to replace fossil fuels, it is required to reduce the cost of solar cells. This can be achieved by depositing thinner absorber layers …
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Modeling hydrogen diffusion for solar cell passivation and process optimization
A diffusion model for hydrogen (H) in crystalline silicon was established which takes into account the charged state conversion, junction field, mobile traps, and complex formation and dissociation at dopant and trap sites. Carrier exchange among the various charged species is a "fast" process …
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Enhancement of Light Absorption Efficiency of Solar Cell Using Dual
… adding a single diffraction grating on top of a solar cell. We simulated the square diffraction grating, as well as triangular diffraction grating. The single square grating showed more favorable results, achieved 330% power improvement compared to 270% power improvement in the single triangular …
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Co-optimizing silicon solar cell processing for efficiency and throughput
Crystalline silicon solar cells are a proven renewable energy technology, but they have yet to reach low costs commensurate with subsidy-free, grid-scale adoption. To achieve the widespread adoption of photovoltaics, the cost per unit of electricity must be reduced by increasing solar cell …
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Materials studies related to the CuxS/ZnyCd1-yS solar cell
A study was conducted of CuₓS and its interaction with the substrate and ambient. The goals of these CuₓS on CdS and Zn<sub>y</sub>Cd<sub>1-y</sub>S substrates were to find the differences in materials related properties, if any. Cadmium and zinc compositions in CuₓS formed on …
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