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 20 for “"Dye-sensitized solar cells (DSSCs)"”.
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Fabricataion of Dye Sensitized Solar Cells With Enhanced Energy Conversion Efficiency
Dye sensitized solar cells (DSSCs) represent a cheap and clean technology that harnesses solar energy efficiently and have been intensively studied. How to further decrease the production cost meanwhile enhance device performance becomes the bottleneck for DSSC commercialization. The thesis focuses …
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Investigation of dye-sensitized solar cell performance with single chirality semiconducting carbon nanotubes
… electrical transport, and optical properties of dye-sensitized solar cells (DSSCs) assembled with single-walled carbon nanotubes (SWNTs) of a single chirality in the photoanode were investigated. Single-chirality carbon nanotubes (CNTs) allow a selection of band-gap and electron mobility. …
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Computational study of low index surface of an anatase TiO2 doped with ruthenium (Ru) and strontium (sr) for application in Dye sensitized solar cells
… in order to improve the efficiency of the dye sensitized solar cells (DSSCs). In this study, first principle density functional theory was used to investigate electronic and optical properties of bulk anatase TiO2, undoped, and ruthenium (Ru) and strontium (Sr) doped anatase TiO2 (1 0 0) …
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Understanding the properties of the interface between graphene and transition metal oxide thin films using first principle approaches
… Functional Theory (DFT) in application to dye-sensitized solar cells (DSSCs). The study aims to slow charge recombination in DSSCs and improve the e ciency of the cell. The geometry optimizations for the electronic and optical properties were performed by the rst principle calculations …
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Harnessing solar energy: vapor phase polymerized poly(3,4-Ethylenedioxythiophene) for solid state dye-sensitized solar cells and the photodegradation of organic toxicants
<p>Solar energy is the most abundant energy resource available and can be utilized for a variety of applications such as photovoltaics and promote chemical reactions. Dye-sensitized solar cells (DSSCs) are a class of photovoltaic cells that have been well studied for their low cost and …
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Investigation of layer-by-layer assembly and M13 bacteriophage nanowires for dye-sensitized solar cells
… the construction of the titania photoanode of dye sensitized solar cells (DSSCs) with a novel nanowire architecture to enhance electron transport. The biotemplated nanowires are shown to significantly increase device electron diffusion length and increase device efficiency as compared to …
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Novel Nanostructured Titania and Titania Nanocomposites for Photovoltaics and Photocatalysis
… is becoming more and more pertinent. Demand for solar energy has experienced exponential increase over the last decade. Nanostructured TiO2 has attracted significant attention due to its nontoxicity, low cost and wide applications in photovoltaics and photocatalysis. This research is focused on …
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The adsorption of bidens pilosa dye molecules onto TiO2 nanoparicle surfaces for optimization of light harvesting efficiency in dye sensitized solor cell: an experimental and theory study
… energy is a key global concern, as a result, Dye sensitized solar cells (DSSCs) have attracted a lot of attention in recent years due to their ease of preparation, low toxicity, and environmental friendliness. The current study describes the green synthesis of TiO2 nanoparticles as well as …
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Photophysical studies of silver(I), platinum(II), palladium(II), and nickel(II) complexes and their use in electronic devices.
… 3 assesses the use of some of these complexes in dye sensitized solar cells (DSSCs); it is shown that these complexes may lead to a viable alternative to the more expensive ruthenium-based dyes that are being implemented now. Chapter 4 is an investigation into donor/acceptor pairs involving this …
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Urea Pre-treatment of N2-annealed Transition Metal Oxides for Low Cost and Efficient Counter Electrodes in Dye-sensitized Solar Cell
<p>Photovoltaic cells have shown great promise as an alternative to fossil fuel-based energy sources. Dye-sensitized solar cells (DSSCs) have shown potential as low-cost replacement to silicon solar cells owing to their reduced material costs and simple fabrication techniques. Platinum (Pt) was …
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Electrochemical and spectroscopic studies of bodipy dyes and nanostructured electrodes for solar energy harvesting and conversion
… new opportunities in their application in solar energy harvesting and conversion and storage. This dissertation explores the emerging technologies to harvest solar energy to generate (1) electricity using boron dipyrromethene (BODIPY)-thiophene- triphenylamine (TPA) dye-sensitized solar …
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Investigating the Electron Transport and Light Scattering Enhancement in Radial Core-Shell Metal-Metal Oxide Novel 3D Nanoarchitectures for Dye Sensitized Solar Cells
<p>Dye-sensitized solar cells (DSSCs) have attained considerable attention during the last decade because of the potential of becoming a low cost alternative to silicon based solar cells. Electron transport is one of the prominent processes in the cell and it is further a complex process because …
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Studies of interaction of dye molecules with TiO2 Brookite clusters for application in dye sensitized solar cells
Dye sensitized solar cells (DSSCs) have attracted rapid interest over the recent years with prospect of emerging as a viable alternative to conventional silicon based solar cells. The photoanode of DSSCs comprises of dye molecules anchored to the surface of semiconductors such as TiO2. However, the …
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Νανοδομημένα και πολυμερή υλικά για εφαρμογή σε ηλιακές κυψελίδες και φωτο-ηλεκτροχρωμικές διατάξεις
… ευαισθητοποιημένες φωτοβολταϊκές κυψελίδες (Dye Sensitized Solar Cells, DSSCs), με αποτέλεσμα να μπορούν να λειτουργούν αυτόνομα. Η έρευνα στον τομέα των φωτο-ηλεκτροχρωμικών βρίσκεται σε πρώιμο στάδιο. Οι φωτο-ηλεκτροχρωμικές διατάξεις που έχουν αναπτυχθεί μέχρι τώρα παρουσιάζουν αρκετά …
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Nanostructured materials for photovoltaics and microwave electronics: methods and applications
… optimization of titanium dioxide morphology for Dye Sensitized Solar Cells (DSSCs) applications. Four different combined sol-gel/solvothermal synthetic approaches were adopted and six different anatase phase mesoporous titanias were prepared and tested as photoanodes in DSSCs. Superior light …
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Thermal and photochemical reactions of large metallaborane clusters and functionalizations of boron nitride nanosheets
… The nanosheets have potential applications in Dye Sensitized Solar Cells.Chapters 1 and 3 describe the thermal and photochemical pathways for two metalladecaboranes, [nido -6-Mn(CO) <sub>3 </sub>B <sub>9 </sub>H <sub>13 </sub>][NMe <sub>4 </sub>] (1.1) and …
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Implementing Solvothermally Synthesized Carbon Nanodots into Dye-Sensitized Solar Cells to Enhance External Quantum Efficiency in the Ultraviolet
… the external quantum efficiency (EQE) of dye-sensitized solar cells (DSSCs) in the ultraviolet. In the first part of this study, the CND core-shell model and a reflux synthesis time-dependent evolving carbogenic core size are confirmed by optical measurements and real-space imaging of …
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Structural Characterization of the Interfacial Structure of the Working Electrode in Dye-sensitized Solar Cells Using X-ray and Neutron Techniques
The transparency and low cost of dye-sensitized solar cells (DSSCs) renders this technology promising for the development of electricity-generating windows in future energy-sustainable buildings. Typically, DSSCs contain a working electrode (photoanode) that consists of a dye adsorbed onto the …
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Phenazine: A Building Block for Multinuclear and Heterometallic Complexes, Where the Ligand Acts as an Electron Acceptor and Radical Abstractor
… for high power-conversion efficiency in the dye sensitized solar cells (DSSCs). They are the core components in the organic light-emitting devices (OLEDs) due to their ability to emit light with the wavelengths largely red- shifted from their absorption wavelength. Ruthenium based sensitizers …
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Development and characterization of solar energy conversion devices based on nanocomposite semiconductors
… study of the development and characterization of solar energy conversion devices based on nanocomposite semiconductors. The PhD research is focused on third generation solar cells, namely in dye−sensitized solar cells (DSSCs) and perovskite solar cells (PSCs). The innovation of this study is …