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 35 for “"OFETs"”.
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Correlation between interface-dependent properties and electrical performances in OFETs
… of Organic Field effect Transistors (OFETs) with a particular interest for investigating the influence of the interfaces on the electrical performances of the devices. Indeed, the parameters which mostly influence the electrical behaviour can be divided into to groups: 1) Intrinsic …
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Water stability of organic and electrolyte-gated field-effect transistors
… we used an additives-based approach to stabilize OFETs immersed in DI water and saline solution, for periods up to a month, making the first high-performance water-stable OFETs reported in the literature. We then repeated the long-term water stability experiments on EG-OFETs, and demonstrated that …
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Threshold voltage in pentacene field effect transistors with parylene dielectric
Organic field effect transistors (OFETs) offer a suitable building block for many flexible, large-area applications such as display backplanes, electronic textiles, and robotic skin. Besides the organic semiconductor itself, an important area in the development of OFETs is the gate dielectric …
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Interfacial Studies of Organic Field-Effect Transistors
Organic field-effect transistors (OFETs) are potential components for large-area electronics because of their attractive advantages: light weight, cost-effective and large-area processability, flexibility and resonable performance potential. However, the commercialization of OFETs faces several …
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Fused Arenes-Based Molecular and Polymeric Materials for Organic Field Effect Transistors
… properties for organic field effect transistors (OFETs). Novel series of fused arene molecules of 9,10-di(thiophen-3-yl)anthracene (1), trans-2,5-(dianthracene-9- vinyl)thiophene (2), trans-5,5’-(dianthracene-9-yl)vinyl)- 2,2’-bithiophene (3), 5,5’-di(2 thiophene)-2,2’-bithiophene (4) , …
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Nanoelectronic Devices using Carbon Nanotubes and Graphene Electrodes: Fabrication and Electronic Transport Investigations
… organic field-effect transistors (OFETs) using different types of graphene electrodes. I show that the performance of OFETs with pentacene as OSC and RGO as electrode can be continuously improved by increasing the carbon sp2 fraction of RGO. The carbon sp2 fractions of RGO were …
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New fluorene based materials for organic electronics
… (OLEDs) and organic field effect transistors (OFETs). The first part of my thesis deals with the synthesis of reactive mesogens with conjugated fluorene units and acrylate end groups as photopolymeriseable species. They were prepared by Suzuki cross coupling reactions with the use of a …
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Facilitating an Integrated Data-Centric Approach to Optimize Donor-Acceptor Copolymer Based Organic Field Effect Transistors
… such as organic field-effect transistors (OFETs), light-emitting diodes, and solar cells. Unlike silicon, CPs can be processed as solutions, rendering them more suitable for developing electronic devices with room for optimization. Unfortunately, progress in organic electronics is hindered …
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Novel patterning techniques for manufacturing organic and nanostructured electronics
… based organic field effect transistors (OFETs) with narrow channel (15 gm) and asymmetric silver/gold contacts. Patterned printing of both organic and metal films is demonstrated, with the operating properties of MoJet-printed OLEDs and OFETs shown to be comparable with the performance of …
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Improving the Stability of Organic Field-Effect Transistors
… organic field-effect transistors (OFETs) have evolved from a convenient tool for semiconductor parameter analysis to a technology slowly entering the market as circuit components in flexible electronics. Since the first devices in the 1980s, OFET mobilities have increased by over …
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Improved Organic Semiconductor Thin-Film Formation through the Addition of Vibrations to the Solution Shearing Method
… for organic field-effect transistors (OFETs) are investigated. Electrical performance for OFETs is currently still limited by the charge carrier mobility, especially when high fabrication speeds are required. In this work, adaptations are made to the solution shearing method to enhance …
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Light scattering studies of organic field effect transistors
… potential of organic field effect transistors (OFETs), organic light emitting diodes (OLEDs), and organic photovoltaics (OPVs) is realized. Among such work, a further development of diagnostic tools that characterize charge transport and device robustness more efficiently is required. Charge …
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Field effect investigations of charge carrier transport in organic semiconductors
… mobilities in organic field effect transistors (OFETs) is a good method for studying the transport properties in organic semiconductors.
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Charge Transport in Organic Electronic Devices: From Nano to Macro-Scale
… rectifiers and organic field-effect transistors (OFETs).
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Structure-Function Relationships in Organic Charge-Transfer Complexes
… pertaining to organic field-effect transistors (OFETs). The materials of focus in these studies are perylene- 7,7,8,8-tetracyanoquinodimethane (perylene-TCNQ), dibenzotetrathiafulvalene-TCNQ (DBTTF-TCNQ), and stilbene-F4TCNQ.
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CHARGE TRANSPORT IN ORGANIC AND HYBRID PEROVSKITE FIELD EFFECT TRANSISTORS
… We fabricate organic field-effect transistors (OFETs) and through the use of several device architectures, in combination with surface treatments, we were able to achieve mobilities as high as 6.8 cm2/Vs. We find that the microstrain induced in the organic semiconductor layer by the mismatch in …
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Organische Feldeffekt-Transistoren: Modellierung und Simulation
… organischer Feldeffekt-Transistoren (OFETs). Mittels numerischer Simulationen wurden detaillierte Untersuchungen zu mehreren Problemstellungen durchgeführt. So wurde der Einfluss einer exponentiellen Verteilung von Trapzuständen, entsprechend dem sogenannten a-Si- oder TFT-Modell, auf …
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Charge transport and mechanical property study of high mobility conjugated polymers
… these newly emerged materials is investigated by OFETs characterisation. An alignment setup is built to fully utilise the rigid backbone of these fused polymers, align polymer chains along a certain direction to improve the directional charge transport property.
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Characterization of organic field effect transistors for OLED displays
This thesis explores the characterization of OFETs that will aid the circuit design of OLED pixel drivers. The contact resistance, flat band voltage, and mobility are extracted from top contact and bottom contact transistors with current-voltage (I-V) and low frequency capacitance-voltage (C-V) …
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Inkjet printing: technique and applications for organic electronic devices
… of the Organic Field-Effect Transistors (OFETs) in this work within the ROBOSKIN project. After an overview of inorganic tactile sensors and of the fundamentals of strain sensing in OFETs, the fabrication steps are described followed by the detailed electromechanical characterization of …
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