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 30 for “"Thin Film Devices"”.
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New Methods for the Investigation of Organic Thin-Film Devices
… new techniques for the investigation of organic thin-film devices and have focussed on properties on the molecular scale as well as on macroscopic properties of organic devices. Scanning probe techniques were used to obtain spatially resolved information on morphology and electro-optical …
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Earth-Abundant Thin-Film Devices for Photovoltaic and Electrochemical Applications
… 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) photovoltaic (PV) devices are a promising technology for …
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Two-dimensional material based layer transfer of thin film devices
… properties that can enable high performance devices superior to silicon for a wide range of device applications. Unfortunately, compound semiconductors industries have seen limited adoption in industries except in occasions where silicon-based technology cannot be used. This is mainly due to …
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Characterization of tellurium back contact layer for CdTe thin film devices
Cadmium Telluride (CdTe) thin film photovoltaic technology has shown favorable progress due to inexpensive and efficient processing techniques. However, efficiencies have yet to reach the overall projected CdTe device efficiency, with the back contact being a main source of CdTe performance …
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Electroactive Conjugated Polymers as Charge-Transport Materials for Optoelectronic Thin-Film Devices
… which combine the prerequisites of an OLED within one material: the transport of positive and negative charges and the formation of emissive excited states. With the carbazole-substituted oxadiazoles 1–3 it was shown that on the one hand the carbazole functionality is suitable for enabling the …
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Delamination of Thin Film Patterns Using Laser-Induced Stress Waves
… adhesive failure and delamination in multilayer thin film devices.
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Solution Routes to Metal Chalcogenide and Zinc Oxide Thin Films for Device Applications
Semiconductor thin films and their fabrication methods have been intensively investigated in order to fulfill a wide spectrum of applications in electronic devices, optical devices, and photoelectronic devices. Solution deposition of semiconductor thin films draws increasing attention since it …
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Elimination of PZT thin film breakage caused by electric current arcing and intrinsic differential strains during poling
… production of lead zirconate titatate (PZT) thin film devices. In this research, two major causes of poling breakage were identified. First, stresses along substrate edges make PZT substrates more susceptible to breakage if any sort of mechanical force is present. It was determined that these …
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Mass transport in metal-organic frameworks as a limiting step in size-selective oligomerization
… applied in gas absorption and storage systems, thin-film devices, and heterogeneous catalysts. While numerous examples of size-exclusive catalysis have been reported, to our knowledge no reports of size-selective oligomerization catalysis have been reported to date. Herein, chemically stable Zr …
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New pyroelectric phenomena from graded ferroelectric barium strontium titanate thin films
… potential application of graded ferroelectric thin films in uncooled pyroelectric detectors. We built a magnetron sputter system, and developed a method of deposited compositional graded ferroelectric thin films using rf magnetron sputtering, a silicon compatible thin film fabrication process. …
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Evaporative printing of organic materials and metals and development of organic memories
… examine charge trapping and storage in organic thin film devices. We demonstrate that by controlled doping, we can engineer charge storage in active organic electronic devices. Charge trapping in organic hetero-junction structures results in two distinct phenomena that both manifest as a memory …
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Scalable Perovskite Thin-Film Photovoltaics
In recent years lead halide based thin-film perovskites have emerged as a promising direct bandgap semiconductor for light absorption and emission applications. This is in part due to their compositional tunability and potential alloying that allows their color to be tuned from the near-IR through …
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Characterization and device applications of II-VI nanocomposites
… simulated and compared with the output of actual devices. The simulation is also used as a design tool in the production of a white-light LED. Embedding the QDs into ZnS films via an electrospray technique is carried out and the resulting films characterized with x-ray diffraction and …
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Growth, fabrication, and measurement of superconducting barium(1-x) potassium bismuth oxygen(3) thin films and devices
… Ba\sb{1-x}K\sb{x}BiO\sb3$ (BKBO) superconducting thin films and thin film devices. Interest in BKBO has been concerned with both fundamental questions concerning its mechanism of superconductivity and potential applications in superconductor devices. $\rm Ba\sb{1-x}K\sb{x}BiO\sb3$ is a …
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Synthesis and Characterization of Chalcogenide Perovskites
… potential to deliver on the promise of low-cost thin film photovoltaics is reason enough to study chalcogenide perovskites. Additionally, their structural similarity to lead-halide and oxide perovskites offers a new opportunity to study related questions in those fields such as defect tolerance …
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Engineering Nanocrystal Devices Through Cation Exchange And Surface Modifications
… which governs the performance of their devices. To continue to push forward NC technologies requires further development and optimization of materials and device design and fabrication process, and efforts are needed to replace the toxic elements found in the most studied NC compositions …
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Flexible Electronics Based on Solution Processable Organic Semiconductors and Colloidal Semiconductor Nanocrystals
… electronics have introduced new functional devices such as light-weight displays and conformal sensors. However, key challenges remain to develop flexible devices from emerging materials that use simple fabrication processes and have high-performance. In this thesis, we first use a …
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Large area electro-optical tactile sensor:Characterization and design of a polymer, nanoparticle based tunneling device
… nanoparticles, a ~100 nm thick, large area thin-film device working on the principles of electron tunneling is self-assembled, such that the change in current density through the film and the electroluminescence light intensity are linearly proportional to the local stress. By pressing a …
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Fabrication and photonics properties of III-V semiconductor nanowire structures
… for optical, optoelectronic, and electronic devices due to their special transverse confinement of electrons and photons along the nanowire axis. In addition, semiconductor nanowires with subwavelength structures exhibit strong optical Mie resonance, making them ideal platforms for realizing …
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Thin Films of Semiconducting Polymers and Block Copolymers by Surface-initiated Polymerization
… organization in organic semiconducting polymer thin films is an important prerequisite for enhancing the efficiency of organic thin-film devices, including organic light-emitting and photovoltaic devices. The current “top-down” paradigm for making such devices is based on utilizing …
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