Download or read book Vertical Organic Field Effect Transistors written by Drona Kumar Dahal and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic Field Effect Transistors (OFETs) have shown immense potential for applications that require low temperature and solution processing on large and flexible substrates. The possibility to tailor organic semiconductors toward targeted functionality and the possibility for low-cost processing on various non-traditional substrates such as paper, plastic, fiber, cloth, etc. have made OFETs highly attractive. Over the past two decades, there has been an intense effort to improve the mobility and transit frequency of OFETs, in particular by adjusting the molecular structure of the organic semiconductor and the morphology of organic thin films, and by optimizing the device geometry. Still, a low reproducibility of transistor parameters and limited charge carrier mobility of organic semiconductors are hindering a further commercialization of this technology. In this study, the processing methods and conditions of the different OFET layers are optimized to achieve high performance and reproducible devices. In order to achieve a high transconductance and increased transit frequency in OFETs, the channel length of the transistors need to be reduced below the sub-micrometer regime. This can be easily achieved in Vertical Organic Field Effect Transistors (VOFETs) without the use of cost intensive structuring methods. However, scaling down the channel lengths into the sub-micrometer regime leads to short channel effects, particularly a large off current resulting from source/drain leakage and a weak saturation in the drain current. An incomplete understanding of the origin of these leakage currents is currently precluding an optimized design of the VOFET. Here, the influence of the injection barrier at the source electrode on the device performance of VOFETs is presented, in particular on off -currents, the on/off ratio, and the transconductance. Two different organic semiconductors are used to prepare devices with a small and large injection barrier at the source electrode. It is shown that the increased injection barrier reduces the source-drain leakage by three orders of magnitude and improves the on/off ratio by more than one order of magnitude. However, suppression of the off current by a larger injection barrier causes an increase in the contact resistance. This ultimately negatively impacts the transit frequency and transconductance of the device. The influence of the injection barrier on the transconductance, off-current, and on/off ratio is further studied by a 2D drift-diffusion simulation. It is shown that a trade off between low off currents and high transconductance values is inherent to the current device setup. To find an optimum combination of transconductance and on/off ratio, the insulation of the source electrodes is optimised and a method to grow an oxide layer that wraps around the whole electrode, including the edge of the source, is established. For this, Aluminum electrodes were anodized electrochemically, which results in a conformal growth of Aluminium Oxide with high quality. It is shown that this oxide reduces the off-currents of vertical OFETs significantly, but a decrease in on-currents with the insulation thickness is observed as well. Most importantly, corresponding vertical transistors show a good saturation in the drain current in output measurement. Integration of the high performance vertical transistors with light emitting layers is implemented to achieve vertical light emitting transistors with good switching behavior. The resonant cavity model is applied in an effort to optimize the different layer thickness of the device. In addition to studying the vertical transistor device performance and optimization, their integration with the light emitting layers is done to realize the vertical organic light emitting transistors with good electrical behavior. The resonant cavity model is applied to model the emissive behavior of vertical organic light emitting transistors and it is expected to open a new area of study in this field.
Download or read book Vertical Organic Field effect Transistors written by Alrun Aline Hauke and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vertical Organic Field effect Transistors written by Alrun Aline Günther Günther and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Organic Field Effect Transistors written by Zhenan Bao and published by CRC Press. This book was released on 2018-10-03 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: The remarkable development of organic thin film transistors (OTFTs) has led to their emerging use in active matrix flat-panel displays, radio frequency identification cards, and sensors. Exploring one class of OTFTs, Organic Field-Effect Transistors provides a comprehensive, multidisciplinary survey of the present theory, charge transport studies, synthetic methodology, materials characterization, and current applications of organic field-effect transistors (OFETs). Covering various aspects of OFETs, the book begins with a theoretical description of charge transport in organic semiconductors at the molecular level. It then discusses the current understanding of charge transport in single-crystal devices, small molecules and oligomers, conjugated polymer devices, and charge injection issues in organic transistors. After describing the design rationales and synthetic methodologies used for organic semiconductors and dielectric materials, the book provides an overview of a variety of characterization techniques used to probe interfacial ordering, microstructure, molecular packing, and orientation crucial to device performance. It also describes the different processing techniques for molecules deposited by vacuum and solution, followed by current technological examples that employ OTFTs in their operation. Featuring respected contributors from around the world, this thorough, up-to-date volume presents both the theory behind OFETs and the latest applications of this promising technology.
Download or read book Handbook of Organic Materials for Electronic and Photonic Devices written by Oksana Ostroverkhova and published by Woodhead Publishing. This book was released on 2018-11-30 with total page 914 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Organic Materials for Electronic and Photonic Devices, Second Edition, provides an overview of the materials, mechanisms, characterization techniques, structure-property relationships, and most promising applications of organic materials. This new release includes new content on emerging organic materials, expanded content on the basic physics behind electronic properties, and new chapters on organic photonics. As advances in organic materials design, fabrication, and processing that enabled charge unprecedented carrier mobilities and power conversion efficiencies have made dramatic advances since the first edition, this latest release presents a necessary understanding of the underlying physics that enabled novel material design and improved organic device design. - Provides a comprehensive overview of the materials, mechanisms, characterization techniques, and structure property relationships of organic electronic and photonic materials - Reviews key applications, including organic solar cells, light-emitting diodes electrochemical cells, sensors, transistors, bioelectronics, and memory devices - New content to reflect latest advances in our understanding of underlying physics to enable material design and device fabrication
Download or read book Optoelectronic Properties Of Vertical Organic Field Effect Transistors written by V. Vasta and published by . This book was released on 2023-12-26 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book "Optoelectronic Properties of Vertical Organic Field Effect Transistors," explores the fascinating world of organic semiconductor devices and their optoelectronic properties. The book is a comprehensive guide to the working principle, fabrication, and characterization of vertical organic field effect transistors, with a focus on their potential applications in optoelectronic devices. The book begins with an introduction to the field of organic semiconductors, explaining the basics of molecular electronics, organic semiconductors, and their unique properties. The author then delves into the detailed working principle and fabrication processes for creating vertical organic field effect transistors, providing an in-depth analysis of their electrical and optical properties. The latter part of the book covers the potential applications of these transistors in various optoelectronic devices, including photodetectors, organic light-emitting diodes, and organic solar cells. The author explores the underlying mechanisms behind these applications and provides a comprehensive review of recent developments in the field. Overall, "Optoelectronic Properties of Vertical Organic Field Effect Transistors" is an essential reference for researchers, students, and professionals interested in the exciting field of organic semiconductors and their potential applications in optoelectronics. It offers a comprehensive overview of the field and provides valuable insights into the working principle, fabrication, and optoelectronic properties of vertical organic field effect transistors.
Download or read book Vertical Organic Field Effect Transistors written by Alrun Aline Günther Günther and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nanoscale Interface for Organic Electronics written by Mitsumasa Iwamoto and published by World Scientific. This book was released on 2011 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book treats the important issues of interface control in organic devices in a wide range of applications that cover from electronics, displays, and sensors to biorelated devices. This book is composed of three parts: Part 1, Nanoscale interface; Part 2, Molecular electronics; Part 3, Polymer electronics.
Download or read book Optoelectronic Properties of Vertical Organic Field Effect Transistors written by Ritu Verma and published by . This book was released on 2023-06-10 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Optoelectronic Properties of Vertical Organic Field Effect Transistors" by Ritu Verma is a comprehensive book that delves into the principles and applications of organic field effect transistors (OFETs) in optoelectronics. The book focuses specifically on the vertical organic field effect transistor (VOFET), which has been recognized as an important component for next-generation optoelectronic devices. The book begins by introducing the fundamental concepts of OFETs, including their working principles, device structures, and properties. It then provides a detailed description of the fabrication process of VOFETs and the materials used to make them. The book covers a range of topics related to VOFETs, including their electrical, optical, and structural properties, and their performance characteristics. The author, Ritu Verma, is an expert in the field of organic electronics and has extensive experience in the design, fabrication, and characterization of organic electronic devices. She has authored numerous research papers in the field and is known for her contributions to the development of high-performance organic electronic devices. Overall, "Optoelectronic Properties of Vertical Organic Field Effect Transistors" is an invaluable resource for researchers, engineers, and graduate students interested in the design, fabrication, and characterization of VOFETs for optoelectronic applications. The book provides a comprehensive overview of the current state of the art in this rapidly evolving field and offers insights into the future of organic optoelectronics.
Download or read book Organic Light Emitting Transistors written by Michele Muccini and published by John Wiley & Sons. This book was released on 2016-04-25 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides an overview of the developments and applications of Organic Light Emitting Transistors (OLETs) science and technology This book discusses the scientific fundamentals and key technological features of Organic Light Emitting Transistors (OLETs) by putting them in the context of organic electronics and photonics. The characteristics of OLETs are benchmarked to those of OLEDs for applications in Flat Panel Displays and sensing technology. The authors provide a comparative analysis between OLED and OLET devices in order to highlight the fundamental differences in terms of device architecture and working principles, and to point out the enabling nature of OLETs for truly flexible displays. The book then explores the principles of OLET devices, their basic optoelectronic characteristics, the properties of currently available materials, processing and fabrication techniques, and the different approaches adopted to structure the active channel and to control organic and hybrid interfaces. Examines the photonic properties of OLETs, focusing on the external quantum efficiency, the brightness, the light outcoupling, and emission directionality Analyzes the charge transport and photophysical properties of OLET, emphasizing the excitonic properties and spatial emitting characteristics Reviews the key building blocks of the OLET devices and their role in determining the device’s performance Discusses the challenges in OLET design, namely color gamut, power efficiency, and reliability Presents key applications of OLET devices and their potential impact on display technology and sensing Organic Light-Emitting Transistors: Towards the Next Generation Display Technology serves as a reference for researchers, technology developers and end-users to have a broad view of the distinguishing features of the OLET technology and to profile the impact on the display and sensing markets.
Download or read book Organic Field Effect Transistors written by Ioannis Kymissis and published by Springer Science & Business Media. This book was released on 2008-12-25 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic Field Effect Transistors presents the state of the art in organic field effect transistors (OFETs), with a particular focus on the materials and techniques useful for making integrated circuits. The monograph begins with some general background on organic semiconductors, discusses the types of organic semiconductor materials suitable for making field effect transistors, the fabrication processes used to make integrated Circuits, and appropriate methods for measurement and modeling. Organic Field Effect Transistors is written as a basic introduction to the subject for practitioners. It will also be of interest to researchers looking for references and techniques that are not part of their subject area or routine. A synthetic organic chemist, for example, who is interested in making OFETs may use the book more as a device design and characterization reference. A thin film processing electrical engineer, on the other hand, may be interested in the book to learn about what types of electron carrying organic semiconductors may be worth trying and learning more about organic semiconductor physics.
Download or read book Vertical Organic Field Effect Transistors Realized by Block copolymers Self assembly written by Ariel J. Ben-Sasson and published by . This book was released on 2013 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Organic Field Effect Transistors written by and published by . This book was released on 2005 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interface Engineering in Organic Field Effect Transistors written by Xuefeng Guo and published by John Wiley & Sons. This book was released on 2023-07-05 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interface Engineering in Organic Field-Effect Transistors Systematic summary of advances in developing effective methodologies of interface engineering in organic field-effect transistors, from models to experimental techniques Interface Engineering in Organic Field-Effect Transistors covers the state of the art in organic field-effect transistors and reviews charge transport at the interfaces, device design concepts, and device fabrication processes, and gives an outlook on the development of future optoelectronic devices. This book starts with an overview of the commonly adopted methods to obtain various semiconductor/semiconductor interfaces and charge transport mechanisms at these heterogeneous interfaces. Then, it covers the modification at the semiconductor/electrode interfaces, through which to tune the work function of electrodes as well as reveal charge injection mechanisms at the interfaces. Charge transport physics at the semiconductor/dielectric interface is discussed in detail. The book describes the remarkable effect of SAM modification on the semiconductor film morphology and thus the electrical performance. In particular, valuable analyses of charge trapping/detrapping engineering at the interface to realize new functions are summarized. Finally, the sensing mechanisms that occur at the semiconductor/environment interfaces of OFETs and the unique detection methods capable of interfacing organic electronics with biology are discussed. Specific sample topics covered in Interface Engineering in Organic Field-Effect Transistors include: Noncovalent modification methods, charge insertion layer at the electrode surface, dielectric surface passivation methods, and covalent modification methods Charge transport mechanism in bulk semiconductors, influence of additives on materials’ nucleation and morphology, solvent additives, and nucleation agents Nanoconfinement effect, enhancing the performance through semiconductor heterojunctions, planar bilayer heterostructure, ambipolar charge-transfer complex, and supramolecular arrangement of heterojunctions Dielectric effect in OFETs, dielectric modification to tune semiconductor morphology, surface energy control, microstructure design, solution shearing, eliminating interfacial traps, and SAM/SiO2 dielectrics A timely resource providing the latest developments in the field and emphasizing new insights for building reliable organic electronic devices, Interface Engineering in Organic Field-Effect Transistors is essential for researchers, scientists, and other interface-related professionals in the fields of organic electronics, nanoelectronics, surface science, solar cells, and sensors.
Download or read book Ambipolar and Light Emitting Organic Field Effect Transistors written by Constance Rost-Bietsch and published by Cuvillier Verlag. This book was released on 2005 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Organic Sensors written by Eduardo Garcia-Breijo and published by IET. This book was released on 2016-11-25 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic Sensors: Materials and Applications features contributions from an international panel of leading researchers in organic electronics and their applications as sensors. It reviews the state-of-the-art in the use of organic electronic materials such as organic semiconductors, conducting polymers, chemically functionalized materials, and composite materials as physical, chemical and biomedical sensors in a variety of application settings. Topics covered include organic semiconductors for chemical and physical sensing; conducting polymers in sensor applications; chemically functionalized organic semiconductors for highly selective sensing; composite organic-inorganic sensors; artificial skin applications; organic thin film transistor strain gauges for biomedical applications; OTFT infrared sensors for touchless human-machine interaction; smart fabric sensors and e-textile technologies; image capture with organic sensors; organic gas sensors and electronic noses; electrolyte gated organic transistors for biochemical sensing; ion-selective organic electrochemical transistors; DNA biosensors; metabolic organic sensors; and conductive polymer-based sensors for biomedical applications. This book is cross-disciplinary in its approach and combines electronic engineering, materials science, chemistry, physics and healthcare technology. It will be an invaluable resource for researchers working in sensors and organic electronics.
Download or read book Organic Semiconductors for Optoelectronics written by Hiroyoshi Naito and published by John Wiley & Sons. This book was released on 2021-08-02 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive coverage of organic electronics, including fundamental theory, basic properties, characterization methods, device physics, and future trends Organic semiconductor materials have vast commercial potential for a wide range of applications, from self-emitting OLED displays and solid-state lighting to plastic electronics and organic solar cells. As research in organic optoelectronic devices continues to expand at an unprecedented rate, organic semiconductors are being applied to flexible displays, biosensors, and other cost-effective green devices in ways not possible with conventional inorganic semiconductors. Organic Semiconductors for Optoelectronics is an up-to-date review of the both the fundamental theory and latest research and development advances in organic semiconductors. Featuring contributions from an international team of experts, this comprehensive volume covers basic properties of organic semiconductors, characterization techniques, device physics, and future trends in organic device development. Detailed chapters provide key information on the device physics of organic field-effect transistors, organic light-emitting diodes, organic solar cells, organic photosensors, and more. This authoritative resource: Provides a clear understanding of the optoelectronic properties of organic semiconductors and their influence to overall device performance Explains the theories behind relevant mechanisms in organic semiconducting materials and in organic devices Discusses current and future trends and challenges in the development of organic optoelectronic devices Reviews electronic properties, device mechanisms, and characterization techniques of organic semiconducting materials Covers theoretical concepts of optical properties of organic semiconductors including fluorescent, phosphorescent, and thermally-assisted delayed fluorescent emitters An important new addition to the Wiley Series in Materials for Electronic & Optoelectronic Applications, Organic Semiconductors for Optoelectronics bridges the gap between advanced books and undergraduate textbooks on semiconductor physics and solid-state physics. It is essential reading for academic researchers, graduate students, and industry professionals involved in organic electronics, materials science, thin film devices, and optoelectronics research and development.
