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 72 for “"Dye-sensitized solar cells"”.
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Organic Sensitizers for High Efficiency Dye-Sensitized Solar Cells
… sunlight for electricity production with dye-sensitized solar cells (DSCs). DSCs are an attractive solar technology due to processing advantages over traditional solar cells. To improve the stability of DSCs, strong surface binding dyes are important. This work studies the dual anchor dual …
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Transparent Platinum Counter Electrode for Building Integrated Dye-sensitized Solar Cells
<p>A new method for fabrication of highly transparent Pt counter electrodes (CE) has been developed based on spray deposition of Pt nanoparticles (Pt-NPs) on hot substrates. The platinum consumption hence the cost of the counter electrode was reduced over 86%, compared to conventional Pt counter …
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Rhenium(II) Complexes as Potential materials for Dye Sensitized Solar Cells
Tandem dye sensitized solar cells, in which both the anode and cathode are photo sensitive, had been proved to improve the overall efficiency of a DSSC. The compounds [Re(dppe)<sub>2</sub>Cl<sub>2</sub>]Cl and [Re(dppe)<sub>2</sub>O<sub>2</sub>]ClO<sub>4</sub>, where dppe is …
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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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Photoanode and counter electrode modification for more efficient dye sensitized solar cells
… an alternative energy source is critical. Solar energy is one of the most promising energy sources and solar cells are the devices that convert solar radiation into electricity. Currently, the most widely used solar cell is based on p-n junction formed with crystalline silicon materials. …
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All-solid-state front-illuminated titania nanotube-based dye-sensitized solar-cells
… front-illuminated titania nanotube-based dye-sensitized solar cells with a focus on all-solid state heterojunction cells. In order to achieve the project goal, I have developed a novel and highly reliable method to transfer nanotubular TiO2 structures onto FTO, and used this unique …
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Structure-property relationships of dyes as applied to dye-sensitized solar cells
… of structural and photovoltaic properties of dyes used in dye-sensitized solar cells. Experimental methods, including ultraviolet-visible spectroscopy, fluorescence spectroscopy, cyclic voltammetry and electrochemical impedance spectroscopy are employed to study optical and electrochemical …
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Dye regeneration kinetics in dye sensitized solar cells studied by scanning electrochemical microscopy
In dieser Dissertation wird eine Reihe von Experimenten vorgestellt, die sich mit lokalen Messungen der Farbstoffregenrationskinetik befassen. Die Reduktion der intermediär gebildeten photooxidierten Farbstoffmoleküle durch Iodidiionen aus der Lösung wurde mit Hilfe eines elektrochemischen …
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Dye sensitized solar cells: optimization of Grätzel solar cells towards plasmonic enhanced photovoltaics
… an alternate method of producing energy is using solar cells to convert sunlight into electrical energy through photovoltaic processes. Currently, the most widely commercialized solar cell is based on a single p-n junction with silicon. Silicon solar cells are able to obtain high efficiencies but …
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Predicting the structure and performance of dye-sensitized solar cells by computational methods.
Dye-sensitized solar cells (DSCs) are a photovoltaic technology based around light-harvesting dye molecules bound to thin semiconductor films of high surface area. Many of the highest-performing DSCs to date incorporate multiple dyes that harvest light from different regions of the solar spectrum …
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Establishing nanoscopic structure-function relationships in the working electrodes of dye-sensitized solar cells
Dye-sensitized solar cells are a strong contender for next-generation photovoltaic technology with niche applications as solar-powered windows. The performance of a DSSC is particularly susceptible to the dye sensitizer, which is adsorbed onto the surface of a wide-band-gap semiconductor such as …
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Photo-electrical conversion efficiency of dye sensitized solar cells prepared from Mopane leaf chlorophyll extract
… solutions is to develop a photovoltaic device (solar cells), since solar energy is abundant. Especially, Namibia receives solar radiation of 5.8 to 6.4 KWh per square meter per day – one of the highest in the world. With 8 to 11 average hours of sunshine per day throughout the year, this offers …
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Synthesis of heteroaromatic ruthenium dyes for use as electron reservoirs in dye-sensitized solar cells
<p>Increasing the usable portion of solar spectrum is a key factor in increasing the efficiency of modern solar cells. The near-IR region of the solar spectrum is often underutilized as a means of energy production, as the photons in this region do not contain enough energy to promote electrons to …
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Development Of Ionic Liquid Swelled Poly-Electrolyte Membranes For Use In Dye-Sensitized Solar Cells
… 1-alkyl-3-methyl imidazolium iodide and used in dye-sensitized solar cells (DSSC). It was hypothesized that the swelled polyelectrolyte would combine the excellent performance of low viscosity electrolyte solvents with the high stability of low vapor pressure solid-state electrolytes, leading to …
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Near-Infrared High Efficiency Organic Dye Sensitized Solar Cells (DSCs) and Biological Fluorescent Imaging Dyes
… energy source is an emergency. For decades, dye-sensitized solar cells (DSCs) have received intensive attention due to their high power conversion efficiency and low material cost. This dissertation describes efforts to design and synthesize near-infrared organic dyes to apply to two systems: …
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Studies on monolithic tandem structure for low cost and high efficiency dye-sensitized solar cells
Multi junction solar cells are devices fabricated from two or more solar absorbers that absorb different parts of the solar spectrum. Typically this is done to yield a device with a superior efficiency to single junction devices derived from those absorbers and to surpass the efficiency limit of a …
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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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