Self Organized Organic Semiconductors
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Self Organized Organic Semiconductors
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Author : Quan Li
language : en
Publisher: John Wiley & Sons
Release Date : 2011-03-03
Self Organized Organic Semiconductors written by Quan Li and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-03-03 with Technology & Engineering categories.
This book focuses on the exciting topic on self-organized organic semiconductors – from materials to device applications. It offers up-to-date and accessible coverage of self-organized semiconductors for organic chemistry, polymer science, liquid crystals, materials science, material engineering, electrical engineering, chemical engineering, optics, optic-electronics, nanotechnology and semiconductors. Chapters cover chemistry, physics, processing, and characterization. The applications include photovoltaics, light-emitting diodes (LEDs), and transistors.
Self Organized Organic Semiconductors
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Author : Quan Li
language : en
Publisher: Wiley
Release Date : 2011-04-26
Self Organized Organic Semiconductors written by Quan Li and has been published by Wiley this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-04-26 with Technology & Engineering categories.
This book focuses on the exciting topic on self-organized organic semiconductors – from materials to device applications. It offers up-to-date and accessible coverage of self-organized semiconductors for organic chemistry, polymer science, liquid crystals, materials science, material engineering, electrical engineering, chemical engineering, optics, optic-electronics, nanotechnology and semiconductors. Chapters cover chemistry, physics, processing, and characterization. The applications include photovoltaics, light-emitting diodes (LEDs), and transistors.
Processing And Characterization Of Organic Thin Films
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Author : Schinke Janusz
language : en
Publisher: Sudwestdeutscher Verlag Fur Hochschulschriften AG
Release Date : 2015-08-20
Processing And Characterization Of Organic Thin Films written by Schinke Janusz and has been published by Sudwestdeutscher Verlag Fur Hochschulschriften AG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-08-20 with categories.
This work deals with two of the major challenges in organic electronics: (i) the optimization of organic/inorganic contacts through interface engineering and (ii) the prevention of intermixing in multilayer solution-processed devices. (i) A suitable method to control organic/inorganic interfaces, not only in terms of interface energetics but also to control the morphology of subsequent layers is the use of self-assembled monolayers (SAMs). Various SAMs from commercially available precursor molecules have been investigated in detail with the aim to optimize the processing parameters for high-throughput fabrication. On the basis of the gained knowledge and experience SAMs composed of novel molecules with strong dipole moments were investigated. (ii) The second part of this work addresses the problem of intermixing of solution-processed thin films. To this end, the film formation was studied of n-type semiconductor materials based on 1,4,5,8-naphthalenetetracarboxdiimide (NDI) with additional thermally cleavable side groups that govern the solubility of the molecules. Both polymer and small molecule organic semiconductors were studied.
Self Assembled Organic Semiconductors
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Author : Lisa Renee Pattison
language : en
Publisher:
Release Date : 2006
Self Assembled Organic Semiconductors written by Lisa Renee Pattison and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
The aim of this thesis work is to enhance the charge carrier mobility in organic semiconductors using self-assembly techniques. We discuss and demonstrate two different self-assembly mechanisms for organic semiconducting thin films. The first technique is to exploit the inherent self-alignment of liquid crystalline polymers. The second technique, graphoepitaxy, has been adopted from the processing of inorganic semiconductors. Graphoepitaxy utilizes surface topography to promote the oriented growth of crystals on amorphous substrates. In addition to studying the effects that self-assembly has on the structure of thin-films, we probe the effects of increased order on the electronic properties by the fabrication and characterization of organic thin film transistors. Most notably, we find that the charge carrier mobility is increased by a factor of 4-6 for aligned, liquid crystalline polymeric semiconductors and by a factor of 8-10 for small molecules oriented by graphoepitaxy.
Investigating The Nucleation Growth And Energy Levels Of Organic Semiconductors For High Performance Plastic Electronics
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Author : Ajay Virkar
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-09-29
Investigating The Nucleation Growth And Energy Levels Of Organic Semiconductors For High Performance Plastic Electronics written by Ajay Virkar and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-09-29 with Technology & Engineering categories.
This thesis details the significant progress made in improving the performance of organic transistors and the network conductivity of carbon nanotubes. The first section investigates organic semiconductor nucleation and growth on the most common dielectric surface used to fabricate organic thin film transistors. The nucleation and growth of the semiconductor was determined to be a critical factor affecting the device performance. Excellent dielectric modification layers, which promote desirable semiconductor growth leading to high conductivity were identified, and a technologically relevant deposition technique was developed to fabricate high quality dielectric modification layers over large areas. This may represent an important step towards the realization of large area organic circuity. In the final section, lessons learned from studying organic semiconductor nucleation and growth were utilized to improve the conductivity of carbon nanotube networks. Selective nucleation of materials at the junctions between nanotubes in the network significantly decreased the network's sheet resistance. The resulting networks may be promising candidates for transparent electrodes with a variety of optoelectronic applications.
Molecular Spintronics
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Author : Marta Galbiati
language : en
Publisher: Springer
Release Date : 2015-10-15
Molecular Spintronics written by Marta Galbiati and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-10-15 with Science categories.
This thesis targets molecular or organic spintronics and more particularly the spin polarization tailoring opportunities that arise from the ferromagnetic metal/molecule hybridization at interfaces: the new concept of spinterface. Molecular or organic spintronics is an emerging research field at the frontier between organic chemistry and spintronics. The manuscript is divided into three parts, the first of which introduces the basic concepts of spintronics and advantages that molecules can bring to this field. The state of the art on organic and molecular spintronics is also presented, with a special emphasis on the physics and experimental evidence for spinterfaces. The book’s second and third parts are dedicated to the two main experimental topics investigated in the thesis: Self-Assembled Monolayers (SAMs) and Organic Semiconductors (OSCs). The study of SAMs-based magnetic tunnel nanojunctions reveals the potential to modulate the properties of such devices “at will,” since each part of the molecule can be tuned independently like a “LEGO” building block. The study of Alq3-based spin valves reveals magnetoresistance effects at room temperature and is aimed at understanding the respective roles played by the two interfaces. Through the development of these systems, we demonstrate their potential for spintronics and provide a solid foundation for spin polarization engineering at the molecular level.
Organic Electronics
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Author : Hagen Klauk
language : en
Publisher: John Wiley & Sons
Release Date : 2006-12-13
Organic Electronics written by Hagen Klauk and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-12-13 with Technology & Engineering categories.
Edited and written by the leading researchers and engineers from such companies as Philips, 3M, Xerox, Infineon, PlasticLogic, Eastman Kodak, Dupont, AIXTRON, and Hueck Folien, this book presents unrivalled and undiluted expertise from those who know best how to assess the risks, opportunities and where this technology is really heading. As such, this practical approach complements the more scientific and fundamentals-oriented literature on the market by providing readers with a first-hand insight into industrial activities to commercialize organic electronics. Following an introduction to the topic, including the history, motivation, benefits and potentials, it reviews recent advances and covers all three important facets of organic electronics: the chemical compounds and materials, manufacturing techniques, and the resulting devices together with their current applications.
Organic Semiconductor Interfaces With Insulators And Metals
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Author : Kathrin Müller
language : en
Publisher: Cuvillier Verlag
Release Date : 2009-10-12
Organic Semiconductor Interfaces With Insulators And Metals written by Kathrin Müller and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-10-12 with Science categories.
The electronic interactions of self-assembled organic semiconductors with metals, metal-oxides and ultrathin insulator surfaces have been investigated by complementary analysis techniques comprising scanning tunnelling microscopy and spectroscopy, low energy electron diffraction, x-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy. Two model systems have been chosen and investigated: The first model system comprises the electronic interactions and the self-assembly of pentacene molecules on the Cu(110) as well as on the oxidized Cu(110) surface. In a second model system the interface of octa-ethyl porphyrins with ultrathin insulator films and metals has been investigated. The adsorption of molecules on insulator surfaces is especially interesting due to the strong reduction of the electronic and chemical interactions between the molecules and the substrate. The investigation of pentacene on the Cu(110) surface revealed a multi-phase behaviour, which is characterized by molecular bending, molecular mobility, different relative orientation of the molecules and different packing densities. Furthermore, the influence of the adsorbate layer on the Shockley surface state of the Cu(110) has been investigated. A complex interplay of different phenomena, like Pauli repulsion, charge transfer, mixing and hybridization of electronic states as well as the polarization of the organic adsorbate in the surface dipolar field, lead to a shift of the surface state to higher binding energies. Additionally, the occupation of the surface state is increased for the adsorption of one monolayer of pentacene. This particular behaviour has not been reported for any other molecular/metal system so far. The adsorption of pentacene on the oxidized Cu(110) surface reveals that the electronic interactions and the surface corrugation determine the self-assembly of the molecular ad-layer. The second project in this thesis comprises the electronic interactions of porphyrin molecules, another representative of molecular semiconductors, with ultrathin insulator layers. The main question here was how the electronic interactions between the molecules and the substrate change with increasing insulator thickness and whether it is possible to electronically decouple the molecules from the substrate for one or two monolayer thin insulator films. A detailed growth study of NaCl on different metal surfaces led to samples, which were homogenously covered with 1 ML of NaCl and thus could be investigated by non-local analysis techniques like UPS and XPS. Low temperature STS and angle-resolved UPS data showed that the CuOEP molecules strongly interact with the Cu(111) and Ag(111) substrate leading to unoccupied electronic states in the band gap of the molecule on Ag(111) and to quenching of the Shockley surfaces state for the adsorption of CuOEP on Cu(111). Further UPS and XPS measurements revealed a strong influence of the chemical environment on the binding energies, as identified by shifted peaks for CuOEP on NaCl compared to CuOEP on the metal surfaces. These peak shifts have been related to strong screening of the photoelectron hole.
Self Assembled Nanostructures Of Biopolymers Organic Semiconductors And Inorganic Compounds
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Author : H. Heinz
language : en
Publisher: Wiley
Release Date : 2014-09-02
Self Assembled Nanostructures Of Biopolymers Organic Semiconductors And Inorganic Compounds written by H. Heinz and has been published by Wiley this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-09-02 with Science categories.
The book explains the self-assembly of nanostructures derived from different materials classes for a broad range of applications. The starting materials comprise biomacromolecules, complex environments at cell surfaces, inorganic building blocks, and synthetic organic polymers. A team of leading experts focuses on the explanation of molecular recognition mechanisms at interfaces that enable control of driving forces for self-organization from the nanometer to the micrometer scale, including biotic-abiotic and inorganic-organic interfaces. The spectrum of topics includes signaling at cell membranes, biologically programmed mineralization of nanostructures, nano-designed building and transportation materials, as well as assembly of soft matter for energy conversion and electronic devices. Structure-property relationships of biological, medicinal, biomimetic, and functional materials from the nanoscale up will be supported by state-of-the-art synthesis, assembly, and characterization techniques, including recent developments in modeling and simulation. The book strives to balance fundamental concepts and emerging applications. The book shows parallels and differences between different fields such as bioengineering, inorganic chemistry, organic electronics, combinatorial materials design, modeling and theory.
Organic Field Effect Transistors
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Author : Zhenan Bao
language : en
Publisher: CRC Press
Release Date : 2018-10-03
Organic Field Effect Transistors written by Zhenan Bao and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-10-03 with Technology & Engineering categories.
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.