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Showing 1 to 20 of 37 for “"DSSCs"”.
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Effect of Ionic Liquid Electrolytes in DSSCs with Titanium Dioxide (TiO2) Inverse Opal Structures
… study on improving the efficiency of DSSCs, the current liquid electrolyte cell has plateaued at a conversion efficiency of ~ 12%. A major problem with these cells regarding their applicability is the low viscosity and high volatility of the toxic electrolyte, i.e., acetonitrile, which …
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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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Novel Nanostructured Titania and Titania Nanocomposites for Photovoltaics and Photocatalysis
… in advanced dye-sensitized solar cells (DSSCs) and efficient photocatalysis. The first part of this work entails fast synthesis of bamboo-type TiO2 nanotube arrays with large surface area via anodization of Ti substrates for applications as photo-anodes in high-efficiency DSSCs. In …
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Integration of liquid crystals with redox electrolytes in dye-sensitised solar cells
… application in dye-sensitised solar cells (DSSCs). The birefringence of LCs causes light modulation, which can be controlled by an applied voltage and electric field. In particular, the LCs are used as one of the components for the electrolyte redox couple which is responsible for charge …
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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
… chemical reactions. Dye-sensitized solar cells (DSSCs) are a class of photovoltaic cells that have been well studied for their low cost and environmentally friendly materials. Previous research focused on developing more efficient liquid phase solar cells, but little work has gone into solid …
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Development and characterization of solar energy conversion devices based on nanocomposite semiconductors
… cells, namely in dye−sensitized solar cells (DSSCs) and perovskite solar cells (PSCs). The innovation of this study is detected on the use of novel materials by well−known methods in order to intervene in the structural and morphological properties of the photoelectrode, the investigation of …
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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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Nanostructured materials for photovoltaics and microwave electronics: methods and applications
… 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 scattering properties, stemming …
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Dye sensitized solar cells: optimization of Grätzel solar cells towards plasmonic enhanced photovoltaics
… with a visible light absorbing species. While DSSCs are less expensive, their efficiencies are still quite low compared to silicon. In this thesis, Grätzel cells (DSSCs based on TiO2 NPs) were fabricated and optimized to establish a reliable standard for further improvement. Optimized single …
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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
… 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 used as a catalyst in the counter electrode for DSSCs. Metal oxides have been used …
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Dye regeneration kinetics in dye sensitized solar cells studied by scanning electrochemical microscopy
… im Feedback-Modus untersucht. Dazu wurden Modell-DSSCs bestehend aus mit Eosin Y oder Indolinfarbstoff (D149) sensibilisiertem Zinkoxid, bzw. mit Rutheniumfarbstoff (N719) sensibilisiertem Titandioxid in Iodid/Triiodid-Elektrolyt (I /I3 ) verwendet. Zur Interpretation wurde ein quantitatives …
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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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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
… 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 their characterization using …
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Investigation of dye-sensitized solar cell performance with single chirality semiconducting carbon nanotubes
… 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. Separating a specific chirality …
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Establishing nanoscopic structure-function relationships in the working electrodes of dye-sensitized solar cells
… SQ-2 on TiO2. Based on the aforementioned study, DSSCs co-sensitized with RK-1 and SQ-2 were studied using spectral and electrical characterization, with supporting DFT simulations. Results show that the dye absorption band can be effectively extended with this co-sensitization strategy to realize …
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Understanding the properties of the interface between graphene and transition metal oxide thin films using first principle approaches
… 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 based on density functional …
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Investigation of layer-by-layer assembly and M13 bacteriophage nanowires for dye-sensitized solar cells
… 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 LbL-templated titania photoanodes …
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Novel Integration Strategies with Photovoltaics Using Different Compound Parabolic Concentrator Geometries: Optical, Thermal, and Scalable Investigations
… solar cells and dye-sensitised solar cells (DSSCs), were fabricated and experimentally integrated with cross-compound parabolic concentrators (CCPCs) and dielectric asymmetric compound parabolic concentrators (DiACPCs). c-PSCs were integrated with CCPCs using adhesive coupling, followed by …
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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
… 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 surface of a …
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Transparent Platinum Counter Electrode for Building Integrated Dye-sensitized Solar Cells
… surface area for the nanoporous Pt nanoclusters. DSSCs with Pt-NP counter electrode had 6.17% power conversion efficiency, comparable to the 6.46% efficiency of the corresponding reference opaque DSSC with sputtered Pt counter electrode.</p>
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