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.
Results
Showing 1 to 20 of 85 for “"Organic photovoltaics"”.
-
Organic photovoltaics and concentrators
… offers several advantages in the design of organic photovoltaics and organic solar concentrators for the ultimate end goal of achieving a lower cost solar electric conversion. In this work, we explore two new device architectures. In antenna organic solar cells, we utilize external energy …
-
Large-area lightweight organic photovoltaics
Lightweight conformable electronics enabled by organic materials and thin-film processing techniques present an avenue towards novel device applications. Imperceptible integration of such devices presents an opportunity towards reimagining how any surface around us can be made electronically active …
-
Reducing recombination in organic photovoltaics
In this thesis, I consider two methods to improve organic photovoltaic efficiency: energy level cascades and promotion of triplet state excitons. The former relies on a thin layer of material placed between the active layers of a photovoltaic device to destabilize excitons. If the interfacial …
-
Processes and Materials for Organic Photovoltaics
The field of organic photovoltaics is driven by the desire for better and cheaper solar cells. While showing much promise, current generations of organic photovoltaic (OPV) devices do not exhibit properties that are suited for wide scale commercialization. While much research has been dedicated …
-
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 …
-
Photosynthesis-inspired device architectures for organic photovoltaics
Organic semiconductor photovoltaics offer a promising route to low-cost, scalable, emissions-free electricity generation. However, achieving higher power conversion efficiencies is critical before these devices can play a larger role in our future energy generation landscape. Organic photovoltaic …
-
Multi-Walled Carbon Nanotubes-Modified Polymer Organic Photovoltaics
… of MWCNTs for the application of polymer organic photovoltaics, and to study the formed MWCNTs-P3HT polymer nanocomposites properties, which are optical absorption, fluorescence emission, and morphology, as well as the formed photovoltaic device performance. This fundamental research would …
-
Evaluation of the commercial potential of organic photovoltaics
… increase in the record efficiencies achieved by organic photovoltaics. These have stimulated further interests and pursuit among the enthusiasts, in terms of both academic research and commercialization efforts. Indeed, organic photovoltaics offer a wide range of unique advantages, such as …
-
Lamination of Inverted Organic Photovoltaics and Associated Physical Properties
… involving hot press lamination of inverted organic photovoltaics. It first gives background and develops a lamination process for fabrication. Then, the process is used to answer fundamental questions about organic photovoltaics and to fabricate previously impossible or overly complicated …
-
Electronic Structure Modelling of Singlet Fission in Organic Photovoltaics
… a multiple-exciton-generation process found in organic materials that could help to enhance the efficiency of future photovoltaic devices, by overcoming the Shockley-Queisser limit. In spite of considerable experimental and theoretical attention, different aspects of the process are still not …
-
Theoretical investigations of the electronic processes in organic photovoltaics
The design of more efficient organic photovoltaics starts with an increase in understanding of the fundamental processes related to organic photovoltaics, such as the charge separation processes at the organic/organic interface, which can only be remedied by a combined theoretical and experimental …
-
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 …
-
TRANSPARENT ELECTRODE AND NOVEL BUFFER LAYER MATERIALS FOR ORGANIC PHOTOVOLTAICS
… promising renewable energy 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 …
-
Design of Multilayer Optical Media: Organic Photovoltaics and Optical Data Storage
… is solar photovoltaic energy capture. In solar photovoltaics, light is converted to electric current by generating charge carriers in semiconductors. These charge carriers are then moved to opposing electrodes generating an electric current. These components: semiconductor, electrodes, and a …
-
Application of CVD graphene in organic photovoltaics as transparent conducting electrodes
… to graphene research, solar cells based on organic materials have also drawn significant attention as a possible candidate for the generation of clean electricity over conventional inorganic photovoltaics due to the interesting properties of organic semiconductors such as high absorption …
-
Polymers via chemical vapor deposition and their application to organic photovoltaics
… is emerging interest in 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 …
-
Nanoparticle Encapsulation and Aggregation Control in Anti-reflection Coatings and Organic Photovoltaics
… in both anti-reflection coatings (ARCs) and organic photovoltaics (OPVs). Ionic self-assembled multilayers (ISAMs) fabrication of poly(allylamine hydrochloride) (PAH) and silica nanoparticles (SiO2 NPs) results in highly-transparent, porous ARCs. However, the ionic bonding and low contact …
-
Self-Organizing n-type Perylene Derivatives for Organic Photovoltaics – Synthesis, Characterization and Application
Diese Dissertation beschäftigt sich mit der maßgeschneiderten Synthese und der Charakterisierung verschiedener selbst organisierender Perylenderivate als n-Typ Halbleiter-Farbstoff zur Anwendung in organischen Photovoltaik-Bauelementen. Dabei liegt der Schwerpunkt auf zwei unterschiedlichen …
-
Ultrafast Spectroscopy of Organic Semiconductors: Singlet Fission and Nonfullerene Acceptors for Organic Photovoltaics
… strategies for enhancing the performance of organic photovoltaics. The first takes advantage of a process called singlet exciton fission, and the second embodies an exodus from the fullerene electron acceptors prominent in organic solar cells. Indeed, this versatile class of tunable small …
Page 1 of 5