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 25 for “"solution deposition"”.
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YBa2Cu3O7-x thin films prepared by Chemical Solution Deposition
… length YBCO films, the cost effective chemical solution deposition (CSD) procedure was selected, given that no vacuum technology is required. To reveal the flexibility and the good optimization possibilities of the CSD approach two main processes were chosen for comparison: a fluorine-free …
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Preparation and characterization of barium based perovskite dielectrics on different bottom electrodes by chemical solution deposition
… to be reduced. Under such circumstances chemical solution deposition methods are increasingly being favoured for deposition of the dielectrics in the near future over other methods due to its simplicity and low precursor costs. While, the commercially available precursors for CSD are cheap, they …
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Microstructure evolution and crystallisation kinetics of pure and isovalently substituted lead titanate thin films derived by chemical solution deposition
… Among the diverse physical and chemical deposition techniques for thin films, chemical solution deposition (CSD) is distinguished by various benefits including easy composition control, high availability of the starting materials, relatively low technical demands, and therefore high …
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Chemical evolution, heteroepitaxy, and monolayer patterning of solution-derived lithium niobate thin layers
… efficient photonic circuit element applications. Solution deposition of such films on near lattice-matched substrates has been conducted, allowing low temperature processing, stoichiometry control, doping capability, and waveguiding analysis of heteroepitaxial thin layers. The structural …
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Preparations and Characterizations of Tantalum Pentoxide-Titanium Dioxide: Ceramics and Thin Films
A chemical-solution deposition method was used to integrate thin films of Ta2O5-TiO2 onto silicon substrates. Precursor solutions were successfully prepared using Ta(OEt)5 and Ti(OEt) 4 in ethanol. Solution stability was shown to be influenced by several factors, including, Rw ratio, additions of …
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Solution-Based Deposition of Ultrathin Metal Oxide Films on Metal and Superconductor Surfaces
Solution deposition from Zr4(OPrn) 16 was also used to deposit ultrathin zirconia films on gold, silver, and aluminum surfaces. X-ray photoelectron spectroscopy and atomic force microscopy were used to compare the physical properties of these films. Electrical measurements showed that zirconia …
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Solution Routes to Metal Chalcogenide and Zinc Oxide Thin Films for Device Applications
… optical devices, and photoelectronic devices. Solution deposition of semiconductor thin films draws increasing attention since it offers low cost, high-throughput production, and better compatibility with flexible or polymeric substrates compared to the vacuum deposition. This dissertation …
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Functional Metal Oxide Coatings from Molecular Precursors for Energy Applications
… and conversion technologies. In this thesis, the solution-deposition of coatings from molecular precursors is explored as a promising approach towards this end. First, a facile method for the deposition of electrocatalytically active zirconium-based films for photoelectrochemical water oxidation …
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Metal oxide/organic interface investigations for photovoltaic devices
… behind these in- stabilities. A simple sol-gel solution deposition technique for the fabrication of stable and highly performing transparent conducting mixed metal oxides (ZnMO) is presented. It is demonstrated that the use of amorphous, mixed metal oxides allows improving the performance and …
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Earth-Abundant Thin-Film Devices for Photovoltaic and Electrochemical Applications
… will require inexpensive, scalable technological solutions. This thesis focuses on the technological development of devices which address two of these 21st-century challenges: global climate change and increasing pharmaceutical contamination of water supplies. Solution-processed Cu2ZnSnSe4 (CZTS) …
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Characterisation of solution processed zinc oxide quasi-superlattice materials for thin film applications
… range of applications in modern optoelectronics. Solution processing allows for novel properties of oxide materials to be investigated through low-cost and scalable techniques in an effort to challenge the current vacuum-based state of the art in metal oxide semiconductor deposition. This work …
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Preparation and characterization of doped lead zirconate titanate Pb(Zr<sub>x</sub>Ti<sub>1-x</sub>)O₃ films
… thin films were prepared by chemical solution deposition and spin-coating method. The precursors for making the undoped PZT films were derived from lead acetate, zirconium n-propoxide, and titanium iso-propoxide. In addition, lanthanum acetylacetonate, neodymium acetate, and niobium …
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Synthesis and Characterization of Ferroelectric (1-x)SrBi2Ta2O9-xBi3TaTiO9 thin films for Non-volatile memory Applications
… thin films fabricated by modified metalorganic solution deposition technique showed much improved properties compared to SrBi2Ta2O9: a leading candidate material for memory applications. A pyrochlore free crystalline phase was obtained at a low annealing temperature of 600 oC and grain size was …
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Surface science approach to catalyst preparation
… chosen as support and its surface was exposed to solutions of PdCl2 in order to deposit a Pd precursor. Scanning Tunneling Microscopy (STM) combined with X-ray Photoelectron Spectroscopy (XPS) have been applied to track both morphological and chemical changes that come along with the …
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Template-controlled integration and characterization of bottom-up grown ferroelectric nanoislands
… production method applied is based on Chemical Solution Deposition (CSD) which is especially suited as it features a non-destructive, parallel processing of smallest ferroelectric nanostructures. A new method, based on pre-defined artificial titanium oxide nucleation sites, is introduced to …
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Nucleation and growth of unsubstituted metal phthalocyanine films from solution on planar substrates
… solar cells with Pcs are produced by vapor deposition, although solution based deposition (like spin casting) is cheaper and offers more possibilities to control the structure of the film. With solution based deposition several parameters (like temperature, solvent and etc.) affect the …
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An Investigation into the Decontamination of Carbon-14 from Irradiated Graphite
… the deposits present on reactor graphite. Two deposition techniques were investigated: microwave plasma assisted chemical vapour deposition and a combination of solution deposition and charring. C-13 precursors were used as they facilitate the study of the selective removal of the deposit by …
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Fabricating and Tailoring Halide Perovskites for Photovoltaic Applications
… energy harvesting is the heart of potential solutions for the energy crisis. Halide perovskites are leading candidates to replace silicon in next generation solar cells. This thesis focuses on halide perovskite materials, aiming to understand their structure, electronic and ionic properties …
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Integration of ferroelectric thin films into silicon based microsystems
… platinum coated silicon substrates by chemical solution deposition (CSD) and are characterized regarding their electrical and electromechanical properties. It has been shown that PZT with a composition of 45% zirconium and 55% titanium shows a very high piezoelectric coefficient of 115 pm/V. …
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Development and Characterisation of Halide Perovskite Visible Light and X-Ray Detection Devices
… impressive properties after low-temperature solution deposition. The device structure decouples the dimensions of photon absorption and charge carrier collection to retain performance across the X-ray spectrum, overcoming the limitations currently preventing the commercial success of direct …
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