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 11 of 11 for “"Thin-film morphology"”.
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Hafnium Dioxide Nanoparticle Thin Film Morphology and Reactivity with Dimethyl Methylphosphonate
… microscopy to determine particle size and thin film morphology. Once characterized, they are exposed to dimethyl methylphosphonate and the surface reaction is analyzed by reflection-absorption infrared spectroscopy.
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Periodic Mesoporous Organosilica: Preparation Characterization and Applications of Novel Materials
… organic groups which can be incorporated within the precursors [(OR)3Si-R-Si(OR)3] giving rise to materials with exceptional properties. We have synthesized and characterized various aromatic PMOs composed of supporting structural monomers (phenylene- or biphenylenebridged) and functional …
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An investigation of liquid crystalline and semiconducting blends for applications in photovoltaics
… efficiency was produced when we annealed within the liquid crystal phase. We investigated the thin film morphology using an atomic force microscope (AFM) and correlated domain size to PV device performance.
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Surfactant Formulations for Water-Based Processing of a Polythiophene Derivative
… solvents have been widely observed to influence thin-film morphology. However, conformational transitions of water-soluble PT derivatives, with respect to their intramolecular versus intermolecular origin, remain largely obscure. Here, conformational transitions of a water- soluble polythiophene …
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Effect of calcination temperature on bilayer TiO2/ZnO and ZnO/TiO2 thin films
Thin film is a thin material that resulting from the condensation of species through the deposition of atoms on substrate. Thin films are usually used in the production of electronic devices, optical coatings, solar cells, and for decorative items. The result of thin film from titanium dioxide …
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Multi-Scale Assembly Methodologies of Poly(3-Hexylthiophene) Derivative Systems for Enhanced Optoelectronic Anisotropy
… polymer backbone orientation and overall thin film morphology. As such, the processing conditions of these systems are important to the construction of high- performance optoelectronics. Polythiophenes are model conjugated polymers that have been studied extensively in halogenated organic …
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The Electroadsorption Field Effect Transistor : numerical and experimental treatment of chemisorption on nanostructured chemical sensors
… that bears close similarity to a buried-gate thin film transistor (TFT) but differs conceptually in that it can control and measure charge density associated with chemisorption that occurs at an outer surface of the semiconducting channel. Similar device structures have been investigated …
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In-Situ and Operando Multimodal Microscopy of Metal Halide Perovskite Optoelectronic Devices
… conversion efficiencies when incorporated into thin film solar cells. The properties of next-generation semiconductors such as perovskites are dominated by microscopic variations in their structure, composition and photophysics. Perovskites show extraordinary levels of disorder and this has …
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Role of growth inhibitors in nucleation and growth of thin film deposited by chemical vapor deposition in high aspect ratio structures
… inhibitors in the nucleation and growth of thin films by chemical vapor deposition (CVD). We focus on steady state processing methods using stable molecules in order to change thin film surface morphology in a controlled manner in high aspect ratio structures. The results also provide …
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Dynamic-template-directed crystallization of semiconducting polymers for organic electronics
… devices. However, controlling the multiscale morphology and device performance of printed polymer thin films remains a key challenge. This is largely due to the disparity in time scales of polymer assembly and high-throughput manufacturing. Designing novel substrate/ink interfaces to induce …
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Understanding emergence of supramolecular chirality in lyotropic conjugated polymers
… chirality in conjugated polymers within lyotropic liquid crystals (LCs) and its dependence on molecular design and solvent selection. Furthermore, it explores the impact of this chirality on device-relevant properties, such as charge carrier mobility and conductivity upon chemical …