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 25 for “"high‐efficiency solar cells"”.
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Influence of bulk defects in p-type Czochralski silicon on reliability of high efficiency solar cells
… should rely on renewable sources such as solar, wind, geothermal, and biomass. Utilizing the Sun, which supplies ~1000 times more than the global energy demand, photovoltaics (PV) provide a reliable, renewable energy source. However, the passivated emitter rear contact (PERC) solar cell, …
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Design and analysis of solar cells by coupled electrical - optical simulation
… optical design are both crucial for achieving high-efficiency solar cells. It is common to link these two aspects serially; the optical design is first done to minimize reflection and maximize light trapping, and then the resulting optical generation rate is input to the electrical simulation. …
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Carrier Dynamics in Perovskite Nanocrystals
… with desirable optoelectronic properties for high-efficiency solar cells. Ultrafast carrier-phonon interactions in semiconductors represent a major loss of the excess energy of photoexcitations above the bandgap. We demonstrate approaches to suppress the relaxation process, which may allow the …
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Micro optics for micro hybrid concentrator photovoltaics
… material and processing costs of multi-junction high efficiency solar cells and improve the conversion efficiency. However, several issues hindered the development of CPV technologies due to the fundamental limit of thermodynamics and practical difficulties of manufacturing and deployment, such …
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ΕΝΑΠΟΘΕΣΗ ΑΜΟΡΦΟΥ ΥΔΡΟΝΩΜΕΝΟΥ ΠΥΡΙΤΙΟΥ ΣΤΗΝ ΕΚΚΕΝΩΣΗ ΑΙΓΛΗΣ ΤΟΥ ΣΙΛΑΝΙΟΥ. ΡΟΛΟΣΤΩΝ ΕΝΕΡΓΩΝ ΕΝΔΙΑΜΕΣΩΝ
… DEPOSITION OF AMORPHOUS HYDROGENATED SILICON FOR HIGH EFFICIENCY SOLAR CELLS. NAMELY, OUR EFFORT IS TO CORRELATE MACROSCOPIC DEPOSITION PARAMETERS WITH MICROSCOPIC PLASMA PARAMETERS AND THE DEPOSITED FILM CHARACTERISTICS. FOR THIS PURPOSE WE USELASER INDUCED FLUORESCENCE AND SPATIALLY RESOLVED …
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GaInN/GaN Schottky Barrier Solar Cells
GaInN has the potential to revolutionize the solar cell industry, enabling higher efficiency solar cells with its wide bandgap range spanning the entire solar spectrum. However, material quality issues stemming from the large lattice mismatch between its binary endpoints and questionable range of …
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Performance limits of silicon solar cells due to structural defects
… coupled with a significant increase in module efficiency. The majority of the factory and equipment costs to produce the crystalline silicon modules that account for over 90% of modules sold today are for production of silicon wafers. While lower-cost wafers can be produced with cheaper …
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Development of indium arsenide quantum dot solar cells for high conversion efficiency
… square meter, which reaches the earth everyday. Solar cells are devices that can be used to collect such abundant form of energy and convert it into electrical energy for daily consumption. Therefore, it is important to research this subject in order to obtain high efficiency solar cells. In this …
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Drift Mobility Measurements and Electrical Characterization in Thin Film Cadmium Telluride Solar Cells
<p>Thin film CdTe solar cells are leading the production in the thin film photovoltaic industry for the recent few years. The electric properties and mechanism for fabrication of high efficiency solar cells are still not well established. In this thesis, I’ll report electron and hole drift …
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Compensation engineering for silicon solar cells
… crystalline silicon relevant to the operation of solar cells. We show that the control of the net dopant density, which is essential to the fabrication of high-efficiency solar cells, is very challenging in ingots crystallized with silicon feedstock containing both boron and phosphorus such as …
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Growth of Indium Nitride Quantum Dots by Molecular Beam Epitaxy
… and electronic device applications such as high efficiency solar cells, solid state lighting (LEDs), and blue laser (Blu-ray Technology) applications. The wide range of direct band gaps covered by its alloys (0.7eV-6.2eV) best illustrates the versatility of III-nitride materials. This wide …
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Compensation engineering for silicon solar cells
… crystalline silicon relevant to the operation of solar cells. We show that the control of the net dopant density, which is essential to the fabrication of high-efficiency solar cells, is very challenging in ingots crystallized with silicon feedstock containing both boron and phosphorus such as …
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Characterization of novel sb-nanostructures by transmission electron microscopy techniques for high efficient solar cells
Photovoltaic (PV) cells are a major source of renewable energy so great efforts have been made to improve the efficiency and reduce costs. Multi-junction (MJ) and Intermediate Band (IB) solar cells (SC) have been proposed with the aim to exceed the Shockley-Queisser efficiency limit of a …
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Heterogeneous Integration of III-V Multijunction Solar Cells on Si Substrate: Cell Design and Modeling, Epitaxial Growth and Fabrication
Achieving high efficiency solar cells and concurrently driving down the cell cost has been among the key objectives for photovoltaic researchers to attain a lower levelized cost of energy (LCOE). While the performance of silicon (Si) based solar cells have almost saturated at an efficiency of ~25%, …
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CdTe solar cells: growth phenomena and device performance
… gained being implemented in the production of solar cells with enhanced performance. In particular the growth mechanisms for close space sublimation (CSS) — grown CdTe were evaluated as a function of processing gas (N2, 02 and H2) and nitrogen pressure. Films were shown to form via the …
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Physical and optoelectronic properties of copper silver indium diselenide thin films
… alternative, cleaner sources of energy such as solar photovoltaic. Researchers in the solar cell community have been looking for ways to reduce costs while maintaining or increasing already high efficiencies. A fundamental understanding of the materials under consideration is essential to rapid …
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Lattice-mismatched epitaxy of AlInP and characterization of its microstructure and luminescence
The synthesis of high-quality III-V ternary alloy semiconductors is vital to the success of major technologies such as LEDs, laser diodes, high-efficiency solar cells and power electronics. However, the epitaxy of ternary alloys can be complicated due to the dissimilar behavior of constituent atoms …
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Tradeoffs of the use of SiGe buffer layers in tandem GaAsP/Si solar cells
III-V multi-junction solar cells currently have the highest reported theoretical and experimental energy conversion efficiency but their cost, mainly attributed to the use of expensive substrates, limits their widespread use for terrestrial applications. Successful integration of III--V's on a Si …
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Characterisation of thin-film semiconductors for device application
… Microcrystalline silicon films deposited at high silane concentration, near the transition from microcrystalline to amorphous growth are found to have similar optoelectronic properties to undoped amorphous silicon films. In contrast, the properties of largely crystalline films, grown at low …
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