Download or read book Morphological and Electrical Studies of Organic Semiconductor Thin Films written by Serkan Zorba and published by . This book was released on 2004 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structural Morphological and Electrical Characterization of Thin Films of Novel Organic Semiconductors written by Siddharth Mohapatra and published by . This book was released on 2004 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Morphological and Electrical Studies of Pentacene Thin Film Transistors written by Michele L. Swiggers and published by . This book was released on 2005 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interface Controlled Organic Thin Films written by Horst-Günter Rubahn and published by Springer Science & Business Media. This book was released on 2009-06-12 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic semiconductors are a central topic of advanced materials research. The book is aiming at bridging the gap between the development and production of devices and basic research on thin film characterisation using cutting-edge techniques in surface and interface science. Topics involve organic molecular-based sensors; interfaces in organic diodes and transistors; mobility in organic field effect transistors and space charge problems; integration of optoelectronic nanostructures; nonlinear optical properties of organic nanostructures; the wetting layer problem; how to get from functionalized molecules to nanoaggregates; optical, electrical and mechanical properties of organic nanofibers as well; as near field investigations of organic thin films.

Download or read book In Situ Real time Studies of Organic Semiconductor Thin Film Growth written by Tushar Vrushank Desai and published by . This book was released on 2012 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis discusses the thin film deposition of small molecule organic semiconductors. Small molecule organics are attracting significant interest primarily due to their ability to form well ordered thin films at low temperatures with reasonable electronic properties. Potential applications of organic based electronics include thin film transistors, display technologies, flexible integrated circuits and photovoltaics. The growth and morphology of these organic thin films is very sensitive to the nature (chemical and physical) of the underlying substrate. A significant challenge in fabricating organic thin film devices with superior electrical characteristics is that of controlling and more importantly understanding the properties at the interface between the organic semiconducting layer and the underlying substrate. In this thesis, the use of supersonic molecular beams as a means to deposit organic semiconductor thin films is discussed in conjunction with in situ real-time synchrotron scattering and ex situ atomic force microscopy as thin film characterization techniques. This thesis discusses the effects of the incident kinetic energy of the small molecule organic and the nature of dielectric (clean silicon dioxide, SiO2; or SiO2 modified with self-assembled monolayers, SAMs, of varying thickness and chemical functionality; or SiO2 modified with polymers of varying surface energy) on the fundamental thin film processes occurring at the organic semiconductor/substrate interface. These thin film processes include adsorption, nucleation and diffusion, and the filling up of individual monolayers during thin film growth. Experiments have provided significant insight into these fundamental thin film processes. The results indicate that the probability of adsorption is a strong function of the incident kinetic energy of the organic molecule and thickness of the underlying SAM. The submonolayer island shape and island density is also a strong function of the underlying substrate with the later implying a change in the diffusivity of the organic with the identity of the substrate. Finally, the results suggest that multilayer thin film morphology such as feature/grain size and the thin film roughness is also a function of the underlying substrate.

Download or read book Evolution of Thin Film Morphology written by Matthew Pelliccione and published by Springer Science & Business Media. This book was released on 2008-01-29 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of this book is on modeling and simulations used in research on the morphological evolution during film growth. The authors emphasize the detailed mathematical formulation of the problem. The book will enable readers themselves to set up a computational program to investigate specific topics of interest in thin film deposition. It will benefit those working in any discipline that requires an understanding of thin film growth processes.

Download or read book Studying the Density of States of Buried Interfaces in Organic Semiconductor Thin Films Using Electronic Sum Frequency Generation written by Aaron Patrick Moon and published by . This book was released on 2019 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: New nanostructured semiconductor materials such as nanocrystals and organic semiconductors constitute an attractive platform for optoelectronics design due to the ease of their processability and highly tunable properties. Incorporating these new nanostructured materials into electrical circuits requires forming junctions between them and other layers in a device, yet the change in dielectric properties about these junctions can strongly perturb the electronic structure of the two layers. Specifically, the morphology of the interface between two materials greatly affect their ability to transfer charge and energy through the system, and the method through which this energy travels across a junction is poorly understood. To study these processes, an interfacial technique is required that measures the Density of States (Dos) at buried interfaces in working devices. In this thesis, we adapt an interface-selective optical technique, electronic sum frequency generation (ESFG), to study the dynamics of energy transfer across interfaces in these materials. We begin by developing “direct” detected ESFG to study the electronic states and morphology at the interface of thin films made from known organic semiconductor materials. Using direct ESFG, we examine the differences in the DoS at an interface in an organic thin film relative to its bulk. Through polarization optics, we study morphological changes in the film caused at the junction of the OSC and substrate. To account for interference from multiple ESFG active interfaces present in a thin film, we use a modeling system to separate contributions to the measured ESFG signal from the air exposed and buried interface of interest. We then adapt the direct detected ESFG to “heterodyne” detected ESFG (HD-ESFG), which significantly increases the detection ability of the ESFG spectrometer. Additionally, HD-ESFG allows us to measure the phase of the materials response, which direct ESFG cannot. This phase information can give a better understanding of the morphology at the interface and additional inputs for thin film interference modeling to better deconvolute the signal from the buried interface

Download or read book Low Molecular Weight Organic Semiconductors written by Thorsten U. Kampen and published by John Wiley & Sons. This book was released on 2011-08-04 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This up-to-date reference for students and researchers in the field is the first systematic treatment on the property measurements of organic semiconductor materials. Following an introduction, the book goes on to treat the structural analysis of thin films and spectroscopy of electronic states. Subsequent sections deal with optical spectroscopy and charge transport. An invaluable source for understanding, handling and applying this key type of material for physicists, materials scientists, graduate students, and analytical laboratories.

Download or read book Organic Electronics II written by Hagen Klauk and published by John Wiley & Sons. This book was released on 2012-03-26 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: Like its predecessor this book is devoted to the materials, manufacturing and applications aspects of organic thin-film transistors. Once again authored by the most renowned experts from this fascinating and fast-moving area of research, it offers a joint perspective both broad and in-depth on the latest developments in the areas of materials chemistry, transport physics, materials characterization, manufacturing technology, and circuit integration of organic transistors. With its many figures and detailed index, this book once again also serves as a ready reference.

Download or read book Effects of Gamma Radiation and Low Energy Electrons Beam on Semiconductor Thin Films written by Mehdi Souli and published by . This book was released on 2023-09-15 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research work has been continuously dedicated by the scientific community to improve or optimize the physical properties of thin films. In this present book, we bring into the attention an important research axis developed in our research group, i.e. the use of irradiation with intense gamma radiation and electron beam energy with the aim to improve and customize the structural, optical, morphological and electrical properties of thin film semiconductors for space and terrestrial photovoltaic applications, dosimetry of ionizing radiation and photocatalysis for the depollution of water contaminated by organic dyes. The number of worldwide scientific contributions and publications in this area of research is considered low compared to other research areas, hence the desire to contribute to developing and enriching this research area of thin film semiconductors. Our work was carried out in collaboration with the National Center for Nuclear Sciences and Technologies (CNSTN) in Tunisia, which owns the industrial equipment for gamma irradiation. An agreement was signed between the LPMC (define LPMC) laboratory and the CNSTN to carry out several gamma irradiation campaigns for several types of materials. Another collaboration was made with the COFICAB industrial company that produces electric cables, which is a subsidiary of the CHAKIRA group, to offer us an electron beam time with their low energy electron accelerator. Irradiation by ionizing radiation is widely used in food preservation to extend their storage or marketing periods and also for the sterilization of medical products. Among the outstanding industrial applications of electron beam irradiation is its use to improve the physical properties of the polymers making up the sheaths of electrical cables. In fact, the electrons emitted by the accelerators entrain free radicals in the polymers, the recombination of which leads to an improvement in their resistance to the high temperature of fires and to harmful solvents. In addition, many research works use irradiation to study the resistance of materials to intense nuclear radiation or to increase their life spans and for certain other materials to strengthen their nuclear waste storage capacities. Hence our motivation to use gamma radiation or electron beam irradiation to try to find improvements in the physical properties of semiconductor thin films used in the photovoltaic field or photocatalysis. Indeed, irradiation could be considered as a powerful tool to modify in a controlled way the electrical, structural, optical and morphological properties of these thin films. The choice of materials was motivated by their role played in optical windows, absorbers or buffer layers, which are commonly used in the new generation of photovoltaic cells. The two families of materials are the transparent conductive oxides (TCO), such as Fe-doped In2O3, and sulfur-based compounds, such as In2S3, Cu2ZnSnS4 and Sm-doped CaSO4. The synthesis and growth of these materials have been developed and optimized in our LPMC laboratory through previous research works. To the best of our knowledge, our work on the irradiation of thin films by gamma radiation of thin films of Cu2ZnSnS4, In2S3 and In2O3 doped with iron and fluorine is novel and the results are of great interest for the scientific community. The main objective of applying irradiation is to systematically control and improve the structural, optical, morphological, or electrical properties of thin films by applying very precise doses of gamma radiation or electron beams. Irradiation can cause structural defects in crystal lattices, generate excitations, change, or transform energy levels or even break atomic bonds, which can be used to tailor the properties of thin film semiconductors for specific applications.

Download or read book Introduction to Organic Semiconductor Heterojunctions written by Donghang Yan and published by John Wiley & Sons. This book was released on 2010-09-16 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is well known that most important electronic devices use Schottky junctions and heterojunctions. Unfortunately there is not an advanced book introducing heterojunctions systematically. Introduction to Organic Semiconductor Heterojunctions fills the gap. In this book, the authors provide a comprehensive discussion and systematic introduction on the state-of-the-art technologies as well as application of organic semiconductor heterojunctions. First book to systematically introduce organic heterojunctions Arms readers with theoretical, experimental and applied aspects of organic heterojunctions The Chinese edition of the book is part of the Chinese Academy of Sciences’ Distinguished Young Scholar Scientific Book Series Introduction to Organic Semiconductor Heterojunctions is an ideal and valued reference for researchers and graduate students focusing on organic thin film devices like organic light-emitting diodes (OLEDs), organic photovoltaic (OPV) cells, and organic field-effect transistors (OFETs). Instructors can use the book as a supplementary text for a semiconductor physics or organic electronics course, giving students a better feel for the application of organic thin film devices.

Download or read book Morphological and Compositional Evolution of Heteroepitaxial Semiconductor Thin Films written by J. Mirecki Millunchick and published by Cambridge University Press. This book was released on 2014-06-05 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strain has a tremendous effect on the morphology and composition of heteroepitaxial semiconductor thin films. Recent progress in strained island formation, and in the morphological and compositional instabilities induced by heteroepitaxial stress, has led to new theoretical and experimental advances, as well as to promising materials for various optoelectronic applications. This book brings together research groups looking at important advances and breaking news in the field. The book centers around mechanisms rather than materials, thus papers in different semiconductor systems, including SiGe, III-V, nitrides, or II-VI semiconductors, are presented. Issues on growth, characterization, and modeling of morphological and compositional nonuniformities are also addressed, as are devices based on these spontaneous structures. Topics include: surface dynamics - atomistic processes; growth on patterned, high-index and vicinal substrates; quantum dots and wires; interdiffusion and segregation; band structure, electronic properties and devices; morphology and microstructure; and nitrides

Download or read book The Non Local Density of States of Electronic Excitations in Organic Semiconductors written by Carl. R Poelking and published by Springer. This book was released on 2017-10-24 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the microscopic understanding of the function of organic semiconductors. By tracing the link between their morphological structure and electronic properties across multiple scales, it represents an important advance in this direction. Organic semiconductors are materials at the interface between hard and soft matter: they combine structural variability, processibility and mechanical flexibility with the ability to efficiently transport charge and energy. This unique set of properties makes them a promising class of materials for electronic devices, including organic solar cells and light-emitting diodes. Understanding their function at the microscopic scale – the goal of this work – is a prerequisite for the rational design and optimization of the underlying materials. Based on new multiscale simulation protocols, the book studies the complex interplay between molecular architecture, supramolecular organization and electronic structure in order to reveal why some materials perform well – and why others do not. In particular, by examining the long-range effects that interrelate microscopic states and mesoscopic structure in these materials, the book provides qualitative and quantitative insights into e.g. the charge-generation process, which also serve as a basis for new optimization strategies.

Download or read book Organic Thin Films written by C. W. Frank and published by . This book was released on 1998 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains papers from an April 1997 symposium held in San Francisco, California. Contributions are divided into sections with initial emphasis on structures (monolayers, supramolecular assemblies, and nanostructures) followed by applications (photonics, microlithography, and microelectronics packaging). Specific topics include polymer- supported biomembrane models, glass transition in ultrathin polymer films, mechanistic studies of chemically amplified resists, and polymeric organic-inorganic hybrid nanocomposites. Annotation copyrighted by Book News, Inc., Portland, OR

Download or read book Thin Film Morphology Control by Electronic and Chemical Interactions written by Dezheng Sun and published by LAP Lambert Academic Publishing. This book was released on 2012-08 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies of thin film growth involve interdependent chemical, electronic and mechanical properties whose comprehensive understanding is critical for predicting thin film morphology and properties. Self assembly of organic molecules on a metal substrate lays the groundwork for structures desired in nanotechnology applications. The three classes of films which I investigate are: monolayer MoS2 with strong Mo-S bonding, anthracene films formed by weak van der Waals interactions, and anthraquinine (AQ) honeycomb networks assembled by the interplay of local hydrogen bonding and substrate-mediated long range interactions. In this book, scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS) and angular resolved ultraviolet photoelectron spectroscopy (ARUPS) have been used to investigate monolayer and sub-monolayer thin films grown on a Cu(111) substrate. My research focuses on the use of STM, XPS and ARUPS to investigate the role of ionic bonding, van der Waals interaction, hydrogen bonding and surface mediated interactions during growth of thin films and how to tailor the film morphology by controlling these interactions.

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 578 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 Structure and Transport in Organic Semiconductor Thin Films written by Sandra Elizabeth Fritz Vos and published by . This book was released on 2006 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: