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Understanding The Impact Of Polymer Self Organization On The Microstructure And Charge Transport In Poly3 Hexylthiophene
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Book Synopsis Understanding the Impact of Polymer Self-organization on the Microstructure and Charge Transport in Poly(3-hexylthiophene) by : Avishek R. Aiyar
Download or read book Understanding the Impact of Polymer Self-organization on the Microstructure and Charge Transport in Poly(3-hexylthiophene) written by Avishek R. Aiyar and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Microstructure and Charge Transport in Conjugated Polymers by : Chenchen Wang
Download or read book Microstructure and Charge Transport in Conjugated Polymers written by Chenchen Wang and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Conjugated polymers have attracted broad interest in the past few decades due to their potential applications in organic light emitting diodes, low-cost flexible circuits, biosensors and photovoltaics. Because of their semicrystalline nature, the spatial arrangement of the crystallites and the disordered regions would have strong impact on the charge transport properties of conjugated polymer thin films. Therefore, in this presentation, I will focus on understanding the relationship between the film's morphology, microstructure and electronic properties, and how to fabricate desired structure to achieve devices with novel electronic performance. In the first part of the presentation, I will show that the device's electronic performance can be greatly improved by engineering its structure in solution based fabrication process. The binary blends of regioregular (rr) and regiorandom (RRa) P3HT are used to form desired FET structures. X-ray diffraction of the blended films is consistent with a vertically-separated structure, with rr-P3HT preferentially crystallizing at the semiconductor/dielectric interface. Because of the ultra-thin rr-P3HT active layer at the interface, these devices not only preserve high mobility in rr-P3HT, but also eliminate the short channel effects due to bulk currents, suggesting a new route to fabricate high performance, short-channel and reliable organic electronic devices. After that, I will discuss the microstructural origin of high mobility in poly(2,5-bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophenes) (PBTTT) thin-film transistors (TFTs). Charge transport in PBTTT TFTs is analyzed with a mobility edge (ME) model and compared to these in poly(3-hexylthiophene) (P3HT) TFTs. With TEM characterization of delaminated films, we conclude that the improved performance of PBTTT compared to P3HT is not due to a low trap density but rather to a high mobility in the crystallites. Finally, the third part of the presentation will focus on optical characterization of doping in conjugated polymers. UV-vis and IR absorption spectra of 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) doped P3HT at different doping concentration are measured and analyzed. Absorption peaks from P3HT, F4TCNQ, F4TCNQ anion and P3HT polaron/bipolarons are identified and decomposed. The P3HT polaron/bipolarons cross sections in UV-vis region are estimated, which can be used to evaluate doping efficiency in this material.
Book Synopsis Organic Field-Effect Transistors by : Zhenan Bao
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 619 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.
Book Synopsis The (Non-)Local Density of States of Electronic Excitations in Organic Semiconductors by : Carl. R Poelking
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.
Book Synopsis Functional Polymer Films, 2 Volume Set by : Wolfgang Knoll
Download or read book Functional Polymer Films, 2 Volume Set written by Wolfgang Knoll and published by John Wiley & Sons. This book was released on 2013-02-12 with total page 1107 pages. Available in PDF, EPUB and Kindle. Book excerpt: Very thin film materials have emerged as a highly interesting and useful quasi 2D-state functionality. They have given rise to numerous applications ranging from protective and smart coatings to electronics, sensors and display technology as well as serving biological, analytical and medical purposes. The tailoring of polymer film properties and functions has become a major research field. As opposed to the traditional treatise on polymer and resin-based coatings, this one-stop reference is the first to give readers a comprehensive view of the latest macromolecular and supramolecular film-based nanotechnology. Bringing together all the important facets and state-of-the-art research, the two well-structured volumes cover film assembly and depostion, functionality and patterning, and analysis and characterization. The result is an in-depth understanding of the phenomena, ordering, scale effects, fabrication, and analysis of polymer ultrathin films. This book will be a valuable addition for Materials Scientists, Polymer Chemists, Surface Scientists, Bioengineers, Coatings Specialists, Chemical Engineers, and Scientists working in this important research field and industry.
Book Synopsis Emerging Photovoltaic Technologies by : Carlito Ponseca
Download or read book Emerging Photovoltaic Technologies written by Carlito Ponseca and published by CRC Press. This book was released on 2019-12-19 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need to address the energy problem and formulate a lasting solution to tame climate change has never been so urgent. The rise of various renewable energy sources, such as solar cell technologies, has given humanity a glimpse of hope that can delay the catastrophic effects of these problems after decades of neglect. This review volume provides in-depth discussion of the fundamental photophysical processes as well as the state-of-the-art device engineering of various emerging photovoltaic technologies, including organic (fullerene, non-fullerene, and ternary), dye-sensitized (ruthenium, iron, and quantum dot), and hybrid metal-halide perovskite solar cells. The book is essential reading for graduate and postgraduate students involved in the photophysics and materials science of solar cell technologies.
Book Synopsis Handbook of Conducting Polymers, Fourth Edition - 2 Volume Set by : John R. Reynolds
Download or read book Handbook of Conducting Polymers, Fourth Edition - 2 Volume Set written by John R. Reynolds and published by CRC Press. This book was released on 2019-11-14 with total page 1488 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last 10 years there have been major advances in fundamental understanding and applications and a vast portfolio of new polymer structures with unique and tailored properties was developed. Work moved from a chemical repeat unit structure to one more based on structural control, new polymerization methodologies, properties, processing, and applications. The 4th Edition takes this into account and will be completely rewritten and reorganized, focusing on spin coating, spray coating, blade/slot die coating, layer-by-layer assembly, and fiber spinning methods; property characterizations of redox, interfacial, electrical, and optical phenomena; and commercial applications.
Book Synopsis Practical Handbook of Photovoltaics by : Augustin McEvoy
Download or read book Practical Handbook of Photovoltaics written by Augustin McEvoy and published by Academic Press. This book was released on 2012 with total page 1269 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook opens with an overview of solar radiation and how its energy can be tapped using photovoltaic cells. Other chapters cover the technology, manufacture and application of PV cells in real situations. The book ends by exploring the economic and business aspects of PV systems.
Book Synopsis Thin-Film Transistors by : Cherie R. Kagan
Download or read book Thin-Film Transistors written by Cherie R. Kagan and published by CRC Press. This book was released on 2003-02-25 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a single-source treatment of developments in TFT production from international specialists. It interweaves overlapping areas in multiple disciplines pertinent to transistor fabrication and explores the killer application of amorphous silicon transistors in active matrix liquid crystal displays. It evaluates the preparation of polycrystallin
Book Synopsis Conjugated Polymers by : John R. Reynolds
Download or read book Conjugated Polymers written by John R. Reynolds and published by CRC Press. This book was released on 2019-03-25 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers properties, processing, and applications of conducting polymers. It discusses properties and characterization, including photophysics and transport. It then moves to processing and morphology of conducting polymers, covering such topics as printing, thermal processing, morphology evolution, conducting polymer composites, thin films
Book Synopsis Electronic Processes in Organic Semiconductors by : Anna Köhler
Download or read book Electronic Processes in Organic Semiconductors written by Anna Köhler and published by John Wiley & Sons. This book was released on 2015-03-17 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first advanced textbook to provide a useful introduction in a brief, coherent and comprehensive way, with a focus on the fundamentals. After having read this book, students will be prepared to understand any of the many multi-authored books available in this field that discuss a particular aspect in more detail, and should also benefit from any of the textbooks in photochemistry or spectroscopy that concentrate on a particular mechanism. Based on a successful and well-proven lecture course given by one of the authors for many years, the book is clearly structured into four sections: electronic structure of organic semiconductors, charged and excited states in organic semiconductors, electronic and optical properties of organic semiconductors, and fundamentals of organic semiconductor devices.
Book Synopsis Polymers in Energy Conversion and Storage by : Inamuddin
Download or read book Polymers in Energy Conversion and Storage written by Inamuddin and published by CRC Press. This book was released on 2022-06-28 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research and development activities in energy conversion and storage are playing a significant role in our daily lives owing to the rising interest in clean energy technologies to alleviate the fossil-fuel crisis. Polymers are used in energy conversion and storage technology due to their low-cost, softness, ductility and flexibility compared to carbon and inorganic materials. Polymers in Energy Conversion and Storage provides in-depth literature on the applicability of polymers in energy conversion and storage, history and progress, fabrication techniques, and potential applications. Highly accomplished experts review current and potential applications including hydrogen production, solar cells, photovoltaics, water splitting, fuel cells, supercapacitors and batteries. Chapters address the history and progress, fabrication techniques, and many applications within a framework of basic studies, novel research, and energy applications. Additional Features Include: Explores all types of energy applications based on polymers and its composites Provides an introduction and essential concepts tailored for the industrial and research community Details historical developments in the use of polymers in energy applications Discusses the advantages of polymers as electrolytes in batteries and fuel cells This book is an invaluable guide for students, professors, scientists and R&D industrial experts working in the field.
Book Synopsis Functional Materials by : S. Banerjee
Download or read book Functional Materials written by S. Banerjee and published by Elsevier. This book was released on 2011-12-09 with total page 731 pages. Available in PDF, EPUB and Kindle. Book excerpt: Functional materials have assumed a very prominent position in several high-tech areas. Such materials are not being classified on the basis of their origin, nature of bonding or processing techniques but are classified on the basis of the functions they can perform. This is a significant departure from the earlier schemes in which materials were described as metals, alloys, ceramics, polymers, glass materials etc. Several new processing techniques have also evolved in the recent past. Because of the diversity of materials and their functions it has become extremely difficult to obtain information from single source. Functional Materials: Preparation, Processing and Applications provides a comprehensive review of the latest developments. Serves as a ready reference for Chemistry, Physics and Materials Science researchers by covering a wide range of functional materials in one book Aids in the design of new materials by emphasizing structure or microstructure – property correlation Covers the processing of functional materials in detail, which helps in conceptualizing the applications of them
Book Synopsis New Polymeric Materials Based on Element-Blocks by : Yoshiki Chujo
Download or read book New Polymeric Materials Based on Element-Blocks written by Yoshiki Chujo and published by Springer. This book was released on 2018-12-22 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the recent progress that has resulted from utilizing the idea of "element-block polymers". A structural unit consisting of various groups of elements is called an "element-block." The design and synthesis of new element-blocks, polymerization of these blocks, and development of methods of forming higher-order structures and achieving hierarchical interface control in order to yield the desired functions are expected to result in manifold advantages. These benefits will encourage the creation of new polymeric materials that share, at a high level, electronic, optical, and magnetic properties not achievable with conventional organic polymeric materials as well as forming properties of molding processability and flexible designability that inorganic materials lack. By pioneering innovative synthetic processes that exploit the reactivity of elements and the preparation techniques employed for inorganic element-blocks, the aim is (1) to create a new series of innovative polymers based on the novel concept of element-block polymers, in which the characteristics of elements are extensively combined and utilized, and (2) to formulate theories related to these polymers. This book demonstrates especially the design strategies and the resulting successful examples offering highly functional materials that utilize element-block polymers as a key unit.
Book Synopsis Interface Engineering in Organic Field-Effect Transistors by : Xuefeng Guo
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.
Book Synopsis Photogeneration & Dynamics of Charge Carriers in the Conjugated Polymer Poly (3-hexylthiophene) by : Gerald Dicker
Download or read book Photogeneration & Dynamics of Charge Carriers in the Conjugated Polymer Poly (3-hexylthiophene) written by Gerald Dicker and published by Delft University Press. This book was released on 2004-01-01 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: The conjugated polymer poly(3-hexylthiophene) is a promising candidate for applications in organic thin-film electronic and optoelectronic devices. This dissertation addresses fundamental issues regarding the photogeneration and recombination dynamics of charge carriers in this polymer. Measurements were carried out using an electrodeless, low-field microwave detection technique. With this technique, the intrinsic charge-carrier photogeneration and charge-transport properties of the material can be studied, in the absence of effects arising from electrode contacts and high electric fields, commonly present in conventional DC conductivity studies.
Book Synopsis McEvoy's Handbook of Photovoltaics by : Soteris Kalogirou
Download or read book McEvoy's Handbook of Photovoltaics written by Soteris Kalogirou and published by Academic Press. This book was released on 2017-08-24 with total page 1341 pages. Available in PDF, EPUB and Kindle. Book excerpt: Practical Handbook of Photovoltaics, Third Edition, is a 'benchmark' publication for those involved in the design, manufacture and use of these devices. This fully revised handbook includes brand new sections on smart grids, net metering and the modeling of photovoltaic systems, as well as fully revised content on developments in photovoltaic applications, the economics of PV manufacturing and updated chapters on solar cell function, raw materials, photovoltaic standards, calibration and testing, all with new examples and case studies. The editor has assembled internationally-respected contributors from industry and academia around the world to make this a truly global reference. It is essential reading for electrical engineers, designers of systems, installers, architects, policymakers and physicists working with photovoltaics. Presents a cast of international experts from industry and academia to ensure the highest quality information from multiple stakeholder perspectives Covers all things photovoltaics, from the principles of solar cell function and their raw materials, to the installation and design of full photovoltaic systems Includes case studies, practical examples, and reports on the latest advances and worldwide applications
