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 transistor"”.
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An organic thin-film transistor circuit for large-area temperature-sensing
This thesis explores the application of organic thin-film transistors (OTFTs) for temperature-sensing. The goal of this work is twofold: the understanding of the OTFT's electrical characteristics' temperature dependence, and the creation of OTFT temperature-sensing circuits. We find that OTFTs have …
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Toxic gas sensors using thin film transistor platform at low temperature
… are commonly used for gas sensing in the form of thin film resistors (TFRs) given their high sensitivity to many vapor species, simple construction and capability for miniaturization. Furthermore, they are generally more stable than polymer-based gas sensors. However, unlike polymers, metal oxide …
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A multi-process reactor for thin film transistor fabrication at low temperatures
Polysilicon Thin Film Transistors (TFT's) have a vast potential in a wide range of applications including, flat panel displays, large area electronics and 3D integrated circuits. This thesis describes advances made in the technology for the fabrication of TFT's. A Multi-Process reactor has been …
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Self-Healing of Open-Circuit Faults in Organic Thin-Film Transistor-Based Flexible Electronics
… a key component in flexible circuits, an organic thin-film transistor (OTFT) fabricated by all inkjet-printing process has been developed and characterised in this study. This transistor uses 6,13-bis(triisopropylsilylethynyl)-pentacene (TIPSPentacene) as the semiconductor, poly (vinyl cinnamate) …
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TFTs circuit simulation models and analogue building block designs
Building functional thin-film-transistor (TFT) circuits is crucial for applications such as wearable, implantable and transparent electronics. Therefore, developing a compact model of an emerging semiconductor material for accurate circuit simulation is the most fundamental requirement for circuit …
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Integration of pentacene-based thin film transistors via photolithography for low and high voltage applications
An organic thin film transistor (OTFT) technology platform has been developed for flexible integrated circuits applications. OTFT performance is tuned by engineering the dielectric constant of the gate insulator and the insulator/semiconductor interface. Full integration is enabled by a low …
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Inorganic semiconductors for printed transistors
… solution deposited and thermally processed into thin film transistor channels, demonstrating for the first time that an inorganic semiconductor can be printed. A peak field effect mobility of 2.05 cm2V-1s-1 1 was observed for a device processed at 350 °C. The highest ON/OFF ratio, found in a …
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Thin film engineering for transparent thin film transistors
… oxide (ZnO) and Indium Gallium Zinc Oxide (IGZO) thin films are of interest as oxide semiconductors in thin film transistor (TFT) applications, due to visible light transparency, and low deposition temperature. There is particular interest in ZnO and IGZO based transparent TFT devices fabricated …
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Fabrication and application of a novel four-terminal hybrid organic/inorganic field-effect transistor for volatile organic compounds sensing
… can operate both in the commonly used ‘organic thin-film transistor’ (OTFT) and ‘chemical field-effect transistor’ (CHEMFET) sensing modes as well as in a new, potentially useful sensing mode, referred to as ‘chemical memory’ mode. Compared to existing commercially available sensors, organic …
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Ultra-High Resolution Environmentally-Friendly Full-Colour Quantum Dot Display Fabricated via Cracking Assisted Transfer Printing
… have fuelled research into their integration within future display application for AR/VR. In particular, the emergence of cadmium-free QDs, prompted by environmental considerations, has achieved performance levels on par with traditional cadmium-based alternatives. Despite advancements in the …
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Chemical vapor sensing with novel coupled-channel field-effect transistors
… in response to polar analyte vapor exposure. Thin film transistor (TFT) geometry relies on a silicon substrate to function as a bottom gate and processing platform. The bilayer device geometry also uses a silicon substrate as a bottom gate and processing platform, but then relies on the …
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High efficiency top-emitting organic light-emitting diodes: design and fabrication
… with current mainstream n-type amorphous silicon thin film transistor (TFT) technology. In this Chapter, the organic/metal and metal/organic interfaces are investigated in detail and their influence on device performance is discussed. In Chapter 6, the degradation of top-emitting OLEDs is studied, …
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Numerical simulations of the forward problem and compressive digital holographic reconstruction of weak scatterers on a planar substrate
TFT (Thin-film transistor) - LCD (Liquid-crystal display) is now widely used by the display industry for the reason that LCD is compact and light with very low power consumption; moreover, it has little or no flicker and no geometric distortion. However, small defects from the bottom layers could …
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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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Studies on the next-generation quantum dots light-emitting diodes for full-colour display and smart lighting application by printing technology
… and active-matrix (AM) based QD-LEDs with thin-film transistor (TFT) backplane is deeply studied for the desired full-colour display and smart lighting system. The control parameters for higher performance devices are extracted and studied by way of modelling the desired architecture and …
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Low temperature (<150 °C) hydrogenated amorphous silicon grown by PECVD with source gas heating
… has been the incorporation of this material into thin film transistor (TFT) arrays for the active matrix addressing of liquid crystal displays. Plasma Enhanced Chemical Vapour Deposition (PECVD) is one of the most successful techniques currently in use for the deposition of device quality a-Si:H. …
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Heterogeneously Integrated Impedance Based Biosensors
… the gate leakage current noise due to the very thin gate oxide. Disposable electrodes fabricated using large-area processing are low cost and flexible in terms of design. In particular, inkjet-printed silver electrodes on glossy paper and gold electrodes on the glass substrate were …
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Analog and Digital Circuits in a Complementary Organic TFT Technology on Flexible Substrate
… are required. The great advantage of organic thin-film transistor (OTFT) technology is the direct fabrication of circuits on low-cost plastic foils by using both low processing temperatures and printing methods that guarantee cost-efficient production. Several applications were faced by using …
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An investigation of the performance and stability of zinc oxide thin-film transistors and the role of high-k dielectrics.
Transparent oxide semiconducting films have continued to receive considerable attention, from a fundamental and application-based point of view, primarily because of their useful fundamental properties. Of particular interest is zinc oxide (ZnO), an n-type semiconductor that exhibits excellent …
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