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 29 for “"Counter electrode"”.
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Transparent Platinum Counter Electrode for Building Integrated Dye-sensitized Solar Cells
… 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 electrode …
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Photoanode and counter electrode modification for more efficient dye sensitized solar cells
… the efficiency by replacing the expensive Pt counter electrode with a novel vertically aligned carbon nanofiber (VACNF) electrode. A large specific electrode surface area (~125 cm[superscript]2 over 1 cm[superscript]2 geometric area) was obtained by using VACNFs. The relatively high surface …
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Planar Tunneling and Andreev Bound State Spectroscopy of Yttrium Barium Copper Oxide Thin Films Using Solution-Deposited Zirconia Insulators
… fabricated tunnel junctions with three different counter-electrode deposition techniques. In doing so, various behaviors of the tunneling conductance and its dependence on magnetic field, temperature, and injected current as a function of these counter-electrode deposition techniques has been …
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Quasistatisch auslenkbarer Kippspiegel zur Ablenkung von Licht
… actuation has been realised. While the drive electrodes are integrated into the deflectable mirror, the whole counter electrode below the mirror plate remains at equal ground potential. The device is manufactured out of two parts using method's of silicon bulk mikro machining. A deflectable …
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Planar Tunneling and Andreev Bound State Spectroscopy of YBa2Cu3O7- d Thin Films Using Solution-Deposited Zirconia Insulators
… fabricated tunnel junctions with three different counter-electrode deposition techniques. In doing so, various behaviors of the tunneling conductance and its dependence on magnetic field, temperature, and injected current as a function of these counter-electrode deposition techniques has been …
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A DIGITAL DATA ACQUISITION SYSTEM FOR INELASTIC ELECTRON TUNNELLING SPECTROSCOPY
… absorbed mode energies occur when the oxidised electrode is positively biased. Possible causes of this phenomenon are discussed. Natural linewidths, as small as 0.45 meV, and variations in observed mode energy and lineshape with modulation voltage for selected modes have been studied at low …
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Development of cost effective materials for use as hydrogen purification membranes
… 600 °C. Finally, long term cycling of working electrodes in sulfuric acid against a Pt counter electrode showed evidence of Pt migration and deposition onto the working electrode. After several hundred cycles the HER onset potential of Mo2C evolved to that of bulk Pt, whereas no change in HER …
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Novel electrode materials and advanced electrochemical diagnostics for electrochromic devices
… is limited. In this work, the effect of the counter electrode (CE) and operating potentials were investigated using an Fe (II) terpyridine based complex as the ECM. From this, it was found that by improving the charge-storage properties at the CE and limiting the potential window used, ECD …
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Optimization of Electrode Configurations for Calibration-Free, Remote Sensing of Heavy Metals in Water Using Double-Potenital Step Anodic Coulometry
… Louisville as a proof of concept, but the cost, electrode fabrication, and complex assembly requirements limit commercial viability and motivate this work. We are targeting electrodes that can be inkjet printed directly onto a 3D-printed polymer electrochemical cell, simplifying the manufacturing …
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Resistive Switching in Porous Low-k Dielectrics
… we present a cheaper replacement for Pt as the counter electrode in RRAM and show that it functions as good as Pt. This work addresses following three areas: 1. Modeling of diffusion in porous dielectrics through elementary jump based simulation. The model is based on random walk theory of …
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Visualization of energy transfer among redox active polymeric colloids via in-situ fluorescence microscopy
… in situ, during electrochemical cycling. A three electrode in-situ cell setup was used for the cycling in which a Pt electrode used as the working electrode, carbon was used as the counter electrode and Ag/AgCl was used as the reference electrode. The system also showed a considerably increased …
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Porous Silicon as Broadband Antireflector for Photovoltaic Application.
… where silicon was the anode and platinum was the counter electrode performed at constant voltage and constant current modes. For the constant voltage mode, three, ten, and thirty minute anodized samples exhibited average reflectances of ~6%, ~5% and ~7% respectively in the ultra-violet to the near …
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Deposition and characterisation of nickel oxide based coatings for advanced glazing applications
… of nickel oxide based thin films for use as a counter electrode in a variable transmittance electrochromic device. Coatings have been prepared using anodic electrodeposition, colloidal precipitation and radio frequency (r.f.) sputtering. Systematic studies of the effect of deposition process …
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Acetate-based Electrolytes for Aqueous Zinc-ion Batteries: An Investigation of the Zinc Anode
… pulsed-field-gradient NMR, and rotating-disk-electrode electrochemistry, I first show how increasing KOAc concentration from 5 m to 27 m transforms the solvation environment into an ion-coordinated network that dramatically slows HER/OER kinetics and yields working electrochemical windows …
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Single-Chamber solid oxide fuel cells: modelling and experiments
… of cross diffusion/convection from the counter electrode, which is an inherent disadvantage in planar and co-planar designs. This is the first experimental report describing that the micro-tubular design offers the highest fuel utilization, cell efficiency and an acceptable level of …
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Electrospray Fundamentals and Non-Covalent Peptide-Lipid Interactions as Studied by Fourier Transform Ion Cyclotron Reonance Mass Spectrometry
… magnitude at longer distances away from the counter electrode, but these same solutions show lower potentials near the ES capillary exit. Removal of easily oxidizable species from the solution causes the measured potential difference to have nonzero values at distances further within the …
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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
… Platinum (Pt) was used as a catalyst in the counter electrode for DSSCs. Metal oxides have been used as an alternative material to Pt. The introduction of oxygen vacancies inside metal oxides helps to facilitate electron transport to the electrolyte to enhance the reduction process of …
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Synthesis and electrochemical characterization of carbon nanotube forests on metal foils for battery electrodes
… batteries are typically a planar design where electrode films are manufactured on metal foils and assembled with an ion-conducting separator. The short diffusion length between electrodes in these thin film configurations increases the power density, but reduces the energy density per …
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Development and characterisation of macro-disc and micro-band electrodes for electrochemical sensing applications
… interest in the integration of miniaturised electrodes with minimally invasive and wearable devices, this thesis sought to explore electrodes fabricated using three different technologies for the construction of electrochemical biosensors: Silicon microfabrication, Laser scribing, and …
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Planar Tunneling Into YBCMO (M = Zinc, Nickel) Thin Films
… are fabricated with either Bi or Pb as a counter-electrode, ex-situ, on thin films grown by off-axis DC magnetron sputter deposition from single stoichiometric targets. Films are grown in different crystallographic orientations, classified into ab-plane and c-axis. Doping concentrations of …
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