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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 38 for “"OPVs"”.
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Fused Arene-Based Molecular Systems as Additives for Organic Photovoltaics
<p>Organic photovoltaics (OPVs) are mainly based on organic semiconducting small molecules, macromolecules, and polymers, which form an active layer in photovoltaics. They act as an active material in absorbing light and causing charge mobility to generate electricity from sunlight. This thesis …
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Comparative Resistance of Maize populations to the maize weevil,Sitophilus zeamais Motschulsky
… respectively) and open pollinated varieties (OPVs) (mean 48 mm cover length and score 2.1). Genotypes were significantly different (p<0.05) for grain hardness. Grain protein content was not significantly different among the genotypes (p>0.05). There was no correlation between protein content …
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Comparative Resistance of Maize populations to the maize weevil,Sitophilus zeamais Motschulsky
… respectively) and open pollinated varieties (OPVs) (mean 48 mm cover length and score 2.1). Genotypes were significantly different (p<0.05) for grain hardness. Grain protein content was not significantly different among the genotypes (p>0.05). There was no correlation between protein content …
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Processes and Materials for Organic Photovoltaics
… fabrication is discussed. This novel process for OPVs is followed by an analysis of new and interesting materials for OPV devices, including a higher efficiency hole-transporting material, and two hole-transporting molecules that exhibit self-assembly during OPV fabrication. The results of these …
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Electronic processes in organic optoelectronics : insights gained through modeling and magnetic field effects
Organic photovoltaics (OPVs) and organic light-emitting diodes (LEDs) are organic optoelectronics offering a number of unique benefits that may play an important role in the future of clean energy generation and efficient energy consumption. In this thesis, we explore key electronic processes in …
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Organic Semiconducing Thin Films: Device Applications and Beyond
… transistors (OTFTs) and organic photovoltaics (OPVs), due to their potential for low cost, high volume fabrication when compared to traditional inorganic semiconductors. While the performance of organic devices generally lags behind the more established inorganic devices, significant growth in …
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Applications of nanoimprinted structures to organic photovoltaics
Small-molecule organic photovoltaic cells (OPVs) have the potential to be a low-cost, flexible power conversion solution to many energy problems. These OPVs take advantage of an extremely thin active layer which enables this flexibility and reduces material volume. However, it is this thin quality …
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Understanding electronic defects in organic solar cells: Defect identification, characterization & mitigation
… work focuses on understanding defects in OPVs through systematic identification of defects, characterization of their nature and exploring approaches for defect mitigation. An understanding on the physical origin of electronic defects is developed using several organic materials. Different …
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TRANSPARENT ELECTRODE AND NOVEL BUFFER LAYER MATERIALS FOR ORGANIC PHOTOVOLTAICS
… sources, among them, organic photovoltaics (OPVs) are emerging because of its low-cost, light-weight and intrinsic flexibility of active layers. In OPVs devices, the transparent electrode, which enable light to pass through and buffer layer materials, including hole and electron transporting …
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Analyzing the Surface Warfare Operational Effectiveness of an Offshore Patrol Vessel using Agent Based Modeling
… Insights gained through the models indicate that OPVs placed in a small boat swarm scenario will be hard pressed to successfully defend an object if not sufficiently armed to combat the threat. While the weapon systems placed on OPVs have a significant impact on simulation results, additional …
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Oxidative chemical vapor deposition of semiconducting polymers and their use In organic photovoltaics
Organic photovoltaics (OPVs) have received significant interest for their potential low cost, high mechanical flexibility, and unique functionalities. OPVs employing semiconducting polymers in the photoactive layer have traditionally been fabricated almost exclusively with solution-based techniques …
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Polymers via chemical vapor deposition and their application to organic photovoltaics
… the ability to fabricate organic photovoltaics (OPVs) on flexible, lightweight substrates, which could lower the cost of installation and enable new form factors for deployment. However, substrate and material choices are often limited by compatibility with common processing agents such as heat …
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Studies and Optimization of All-Polymer Solar Cells based on Naphthalene Diimide-Biselenophene Copolymer Acceptors
… been made in the field of organic photovoltaics (OPVs) for future energy applications in the last two decades. Studies and understanding of fullerene-based polymer solar cells have led to a power conversion efficiency (PCE) of over 12%. However, such fullerene-based OPVs are not stable in air, …
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The Role of Disorder in the Charge Dissociation and Recombination Processes of Organic Photovoltaic Materials
Organic Photovoltaic devices (OPVs) are becoming adequately cost and energy efficient to be considered a good investment and it is, therefore, especially important to have a concrete understanding of their operation. In this work, we use a fully quantum mechanical model of the electronic states of …
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Nanostructural engineering of vapor-processed organic photovoltaics for efficient solar energy conversion from any Surface
… fill this need, however organic photovoltaics (OPVs) are ideal candidates due to their potential to be ultra-lightweight and flexible. However, this promising technology is currently limited by its relatively low power conversion efficiencies. This doctoral dissertation seeks to speed the eming …
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Exciton behaviour at organic solar cell interfaces
Organic photovoltaics (OPVs) have emerged as a promising class of materials 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 …
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Productivity and system improvements in an organic photovoltaic panel manufacturing facility
… photovoltaic (OPV) finishing process after the OPVs have been coated with the active material). Because of the significant labor hours required and inaccuracies involved in manual inventory counting, an automated inventory tracking system was developed for the finishing processes using barcode …
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Design, synthesis and characterization of thiazole-based conjugated polymers and their applications to n-channel organic electronics
… transistors (OFETs), organic photovoltaics (OPVs), and organic light-emitting diodes (OLEDs), etc. In the past two decades, a great number of conjugated polymers with mobility surpassing that of amorphous silicon have been reported. However, most of these high-mobility conjugated polymers are …
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Synthesis of Perylenediimide-Functionalized Silsesquioxane Nanostructures
… applications including organic photovoltaics (OPVs). Perylenediimide (PDI) derivatives have also been known as one of the best n-type organic semiconductors. PDI derivatives can form bulk materials, which are both photochemically and thermally stable and have been widely used in various …
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Off-Metal Synthesis of Some Aryl Substituted Rhenium n5-Cyclopenta [C] Pyridazyl Complexes
… Diodes (OLEDs) and Organic Photovoltaic Cell (OPVs). Our recent efforts has been focused on the synthesis of a variety of 5,6-fused ring pyridazines. These fused heterocycles will serve as synthetic models and building blocks for potential organic or organometallic conducting polymers. <br> Our …
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