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 44 for “"Thermal Evaporation"”.
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Thermal Evaporation and Sputtering Studies of Lithium and Lithiated Graphite
Made available in DSpace on 2017-07-06T18:48:44Z (GMT). No. of bitstreams: 2 Ibano_Kenzo_S_MS.pdf: 12873949 bytes, checksum: 7415d59e55113ba2e6e0368fac5636f3 (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 2009
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Metal deposition on TiO2(110) via thermal evaporation, photolysis and thermolysis: a combined FT-RAIRS and XPS study
Model systems combined with surface science techniques provide a powerful tool for the study of oxide supported metal overlayers. This thesis describes the synthesis and characterisation of Cu, Mo and Au overlayers on TiO2(110) deposited using a number of methods.<br/>Cu overlayers were deposited …
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HfO2 as gate dielectric on Si and Ge substrate
… HfO_2 as gate dielectric deposited by standard thermal evaporation and e-beam evaporation on Si and Ge substrates were investigated. The dielectric constant of HfO_2 deposited by thermal evaporation on Si is in the range of 18-25. Al/HfO_2/Si MOS capacitors annealed at 450 C show low hysteresis, …
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The Effects of Highly Reflecting Materials on Nearby Fluorescent Probes
… produced by spin-coating and the other layers by thermal evaporation.
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Annealing for intrinsic point-defect control and enhanced solar cell performance : the case of H₂S and tin sulfide (SnS)
… of SnS is explored using RF sputtering and thermal evaporation. Thermal evaporation yielded phase pure films and a SnS solar cell device stack was developed using a ZnOxSy film as the n-type buffer layer. It is hypothesized that annealing in H₂S/H₂ gas mixtures will improve film morphology, …
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Processing Ion Beam Mixed Nickel/Polyimide Thin Films
… for Nickel/Polyimide ion beam-mixed films using thermal evaporation. We then used the low-temperature characterization system in the Materials Physics Testing lab at SMSU to measure the resistance of each film as a function of temperature. These methods have been described thoroughly as a …
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Europium oxide as a perfect electron spin filter
… to bulk form. EuO films were grown by reactive thermal evaporation, and various thin film characterization techniques were employed to determine the structural, optical, and magnetic properties, even on the thickness scale needed for tunneling (<3 nm). The film properties closely matched those …
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Fabrication of a luminescent solar concentrator that minimizes self-absorption losses using inter-chromophore energy transfer
… of intermolecular spacing is achieved through thermal evaporation of small molecule organics. A LSC with a geometric gain of 25 is fabricated that employs this optimized system. External quantum efficiencies of 32% are achieved across nearly half the visible spectrum, with a total power …
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Demonstrating visibly transparent solar cells and photodetectors
… We fabricated our devices through spin-coating, thermal evaporation and sputtering and characterized the performance of our devices by measuring the current-voltage behavior, external quantum efficiency and visible transparency. Our devices demonstrate an average visible transparency of around …
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Solar energy conversion via photovoltaics and photocatalysis
… other standard vacuum processes (e.g., vacuum thermal evaporation). Based on the above-mentioned technical advantages from oCVD, polyselenophene and poly(3,4- dimethoxythiophene) have been successfully applied to organic photovoltaics. Cost-effective solar hydrogen production requires catalytic …
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Vapor Transport Deposition for Perovskite Solar Cells
… these solar cells. As a low-cost alternative to thermal evaporation, VTD has the potential to deposit organic and inorganic perovskite precursor materials either sequentially or via co-deposition. Co-deposition can benefit film formation by increasing the deposition speed and improving film …
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Modeling tin sulfide grain growth during post-processing
… under different annealing conditions. After thermal evaporation deposition, three different conditions were varied during annealing to affect grain growth: time, temperature, and annealing atmosphere. The samples were also deposited on two different substrates, glass and molybdenum. The …
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The Stability of PbS Quantum Dot Solar Cells
… to heal the QD-top electrode interface following thermal evaporation of electrodes onto QDs. Next, we characterize the operational stability of PbS QD solar cells under systematically tuned stress conditions such as continuous illumination, heating, environment, and electrical bias. We demonstrate …
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Oxidative chemical vapor deposition of semiconducting polymers and their use In organic photovoltaics
… other standard vacuum processes (e.g. vacuum thermal evaporation). Various semiconducting polymers, including insoluble polymers that are difficult to process using conventional methods, are successfully deposited via oCVD by changing the monomer precursor. The optoelectronic properties of …
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Polymers via chemical vapor deposition and their application to organic photovoltaics
… other standard vacuum processes (e.g., vacuum thermal evaporation). Conductive poly(3,4-ethylenedioxythiophene) (PEDOT) layers deposited by oCVD are explored for a variety of roles within vacuum-processed OPVs, including as a transparent anode, as an anode buffer layer on ITO transparent …
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The stability of short-period extrasolar giant planets
… because the stability of the atmosphere against thermal evaporation is controlled by the conditions in the thermosphere. The thermosphere is heated by the absorption of EUV and X ray (XUV) radiation emitted by the host star. The radiation also ionises the neutral species in the upper atmosphere, …
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Geometry Dependent Plasmonic Activities of a Self-assembled Hexagonal Lattice and a Periodic Hexagonal Lattice with Gold Nanopillars
… nanobead etching masks, reactive ion etching and thermal evaporation of the metal layer. The optimum geometrical parameters for the selfassembled hexagonal lattice were d = 365 nm and h = 70 nm. A self-assembled hexagonal lattice had average electric field intensity 19 times greater than that of …
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The interplay of nanostructure and efficiency of polymer solar cells
… can be either deposited from solution or by thermal evaporation, allowing for a large variety of layer architectures to be realized. I then demonstrated that the layer architecture has a large influence on the photovoltaic properties. Solar cells with very high fill factors of up to 57 % and …
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Designing Nanomaterials For Electronic And Optoelectronic Devices Through Charge Carrier Control
… We develop stoichiometry control method through thermal evaporation or solution based atomic layer deposition to precisely control the electronic and optoelectronic properties of nanocrystals. We demonstrate that remote doping in nanostructured device is effective and a promising route to …
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Microfabrication and Evaluation of Planar Thin-Film Microfluidic Devices
… combines the processes of photolithography, thermal evaporation, plasma enhanced chemical vapor deposition (PECVD), and wet chemical etching to ultimately provide hollow-core channels. When these microcapillaries are filled with buffer and potentials are applied across them, control of the …
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