Electronic Processes in Organic Electronics

As this book is intended to serve as a textbook for a graduate level course or as reference material for researchers in organic electronics and nanoscience from electronic states, fundamental science that is necessary to understand the ...

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Author: Hisao Ishii

Publisher: Springer

ISBN: 9784431552062

Category: Science

Page: 432

View: 135

The book covers a variety of studies of organic semiconductors, from fundamental electronic states to device applications, including theoretical studies. Furthermore, innovative experimental techniques, e.g., ultrahigh sensitivity photoelectron spectroscopy, photoelectron yield spectroscopy, spin-resolved scanning tunneling microscopy (STM), and a material processing method with optical-vortex and polarization-vortex lasers, are introduced. As this book is intended to serve as a textbook for a graduate level course or as reference material for researchers in organic electronics and nanoscience from electronic states, fundamental science that is necessary to understand the research is described. It does not duplicate the books already written on organic electronics, but focuses mainly on electronic properties that arise from the nature of organic semiconductors (molecular solids). The new experimental methods introduced in this book are applicable to various materials (e.g., metals, inorganic and organic materials). Thus the book is also useful for experts working in physics, chemistry, and related engineering and industrial fields.

Electronic Processes in Organic Semiconductors

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 ...

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Author: Anna Köhler

Publisher: John Wiley & Sons

ISBN: 9783527685165

Category: Technology & Engineering

Page: 424

View: 988

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.

Electronic Processes in Organic Semiconductors

1.1 Introduction Organic semiconductors are a class of materials that combine the electronic advantages of semiconducting materials with the chemical and ...

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Author: Anna Köhler

Publisher: John Wiley & Sons

ISBN: 9783527332922

Category: Science

Page: 424

View: 677

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.

Toward a Unified Treatment of Electronic Processes in Organic Semiconductors

A quantitative study of n-type doping in highly crystalline organic semiconductor films establishes the predominant influence of electrostatic forces in these low-dielectric materials.

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Author: Gregg. B. A.

Publisher:

ISBN: OCLC:316323014

Category:

Page: 5

View: 123

A quantitative study of n-type doping in highly crystalline organic semiconductor films establishes the predominant influence of electrostatic forces in these low-dielectric materials. Based on these findings, a self-consistent model of doped (purposely or not) organic semiconductors is proposed in which: (1) the equilibrium free carrier density, nf, is a small fraction of the total charge density; (2) a superlinear increase in conductivity with doping density is universal; (3) nf increases with applied electric field; and (4) the carrier mobility is field-dependent regardless of crystallinity.

Electronic Processes in Organic Crystals and Polymers

Foreword to the First Edition by Professor Sir Nevill Mott Organic semiconductors
, and electronic processes in organic materials generally , have recently become
a fashionable subject of research . The reasons are many , but certainly the ...

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Author: Martin Pope

Publisher: Oxford University Press on Demand

ISBN: UOM:39015048546439

Category: Science

Page: 1328

View: 647

The first edition of Pope and Swenberg's Electronic Processes of Organic Crystals, published in 1982, became the classic reference in the field. It provided a tutorial on the experimental and related theoretical properties of aromatic hydrocarbon crystals and included emerging work on polymers and superconductivity. This new edition contains the complete text of the first edition, plus an extensive new section, comprising nearly half of the book, which covers recent developments and applications with polymers. The book provides a unified description of what is known in almost every aspect of the field, from basic phenomena to the latest practical applications, which include LED's, photocopiers, photoconductors, batteries, transistors, liquid crystals, photorefractive devices, and sensors.

Solution Processable Components for Organic Electronic Devices

Electrical conductivity of organic semiconductors. Solid State Physics 12 (C): 93–148. 6 Pope, M. and Swenberg, C.E. (1999). Electronic Processes in Organic ...

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Author: Beata Luszczynska

Publisher: John Wiley & Sons

ISBN: 9783527344420

Category: Technology & Engineering

Page: 688

View: 383

Provides first-hand insights into advanced fabrication techniques for solution processable organic electronics materials and devices The field of printable organic electronics has emerged as a technology which plays a major role in materials science research and development. Printable organic electronics soon compete with, and for specific applications can even outpace, conventional semiconductor devices in terms of performance, cost, and versatility. Printing techniques allow for large-scale fabrication of organic electronic components and functional devices for use as wearable electronics, health-care sensors, Internet of Things, monitoring of environment pollution and many others, yet-to-be-conceived applications. The first part of Solution-Processable Components for Organic Electronic Devices covers the synthesis of: soluble conjugated polymers; solution-processable nanoparticles of inorganic semiconductors; high-k nanoparticles by means of controlled radical polymerization; advanced blending techniques yielding novel materials with extraordinary properties. The book also discusses photogeneration of charge carriers in nanostructured bulk heterojunctions and charge carrier transport in multicomponent materials such as composites and nanocomposites as well as photovoltaic devices modelling. The second part of the book is devoted to organic electronic devices, such as field effect transistors, light emitting diodes, photovoltaics, photodiodes and electronic memory devices which can be produced by solution-based methods, including printing and roll-to-roll manufacturing. The book provides in-depth knowledge for experienced researchers and for those entering the field. It comprises 12 chapters focused on: ? novel organic electronics components synthesis and solution-based processing techniques ? advanced analysis of mechanisms governing charge carrier generation and transport in organic semiconductors and devices ? fabrication techniques and characterization methods of organic electronic devices Providing coverage of the state of the art of organic electronics, Solution-Processable Components for Organic Electronic Devices is an excellent book for materials scientists, applied physicists, engineering scientists, and those working in the electronics industry.

The Cengage Guide to Research 2016 MLA Update

Kohler A, Bassler H. Electronic processes in organic semiconductors. Weinheim (Germany): Wiley; 2015. Notice there is no“and”between the two authors; ...

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Author: Susan K. Miller-Cochran

Publisher: Cengage Learning

ISBN: 9781305887411

Category: Education

Page: 448

View: 231

Help students develop the research skills they need for success in academic, career, and everyday situations with THE CENGAGE GUIDE TO RESEARCH, 3rd Edition. Recognizing that technology is a part of daily life, the authors show students how to apply the research skills they use every day (buying a car or choosing a cell phone plan, for example) to academic and professional settings. Annotated student samples, research scenarios, and Techno Tips illustrate the how and why of researching and engage students with key research technologies important to success. This edition has been updated to reflect guidelines from the 2016 MLA HANDBOOK, Eighth Edition. Important Notice: Media content referenced within the product description or the product text may not be available in the ebook version.

Composite Stacked Organic Semiconductors

Over the last three decades, organic semiconductors, both polymeric and small-molecule compounds, have raised significant interest in academia and industry in view of the attractive combination of their versatile optoelectronic properties, ...

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Author: Liyang Yu

Publisher:

ISBN: OCLC:879382660

Category:

Page:

View: 449

Over the last three decades, organic semiconductors, both polymeric and small-molecule compounds, have raised significant interest in academia and industry in view of the attractive combination of their versatile optoelectronic properties, lightness, flexibility and potential for low-cost and straight-forward manufacturing that makes them a valid alternative to conventional inorganic semiconductors. Thereby, 6,13-bis(triisopropylsilylethynyl) (TIPS) pentacene and other pentacene and anthradithiophene derivatives are interesting candidate materials for electronic applications such as organic field-effect transistors (OFETs) as they feature highly promising device performance and offer the possibility of processing them from solution, originating from their good solubility in common solvents. However, the small-molecule nature of these compounds often renders the control of the solid-state morphology of architectures deposited from solution challenging, thus, resulting in low reproducibility of their transistor characteristics. This thesis explores possible pathways to control the thin-film microstructure of such small molecules. By doing so, we aim to provide model systems that permit the elucidation of relevant electronic processes in these materials and to provide architectures for future technological exploitation. A thorough analysis is presented including the influence of the selection of solvent, casting temperature, coating techniques and the presence of small-molecular additives on the morphology of such semiconducting small-molecule thin films. Various strategies for chemical modification of TIPS pentacene are also discussed with focus of the effect of sidechain substitution on the electronic properties of the resulting architectures. Furthermore, investigations into the supramolecular arrangements that can be realised with some of those low-molecular-weight materials are presented and how this affects their optoelectronic features.

New N channel Organic Semiconductors for Thin Film Transistors

28 29 30 31 32 33 34 J. Kanicki ( Ed . ) , Amorphous and Microcrystalline
Semiconductor Devices , Vol . 2 : Materials and ... M. Pope and C. E. Swenberg ,
Electronic Processes in Organic Crystals and Polymers , 2nd ed . ( Oxford
University ...

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Author: Reid John Chesterfield

Publisher:

ISBN: MINN:31951P00923148T

Category:

Page: 318

View: 655

Ultrafast Dynamics and Laser Action of Organic Semiconductors

Willardson, R. K., and Beers, A. C., ed., Semiconductors and semimetals, vol. ... Pope, M., and Swenberg, C. E., Electronic processes in organic crystals ...

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Author: Zeev Valy Vardeny

Publisher: CRC Press

ISBN: 142007282X

Category: Science

Page: 336

View: 184

Spurred on by extensive research in recent years, organic semiconductors are now used in an array of areas, such as organic light emitting diodes (OLEDs), photovoltaics, and other optoelectronics. In all of these novel applications, the photoexcitations in organic semiconductors play a vital role. Exploring the early stages of photoexcitations that follow photon absorption, Ultrafast Dynamics and Laser Action of Organic Semiconductors presents the latest research investigations on photoexcitation ultrafast dynamics and laser action in pi-conjugated polymer films, solutions, and microcavities. In the first few chapters, the book examines the interplay of charge (polarons) and neutral (excitons) photoexcitations in pi-conjugated polymers, oligomers, and molecular crystals in the time domain of 100 fs–2 ns. Summarizing the state of the art in lasing, the final chapters introduce the phenomenon of laser action in organics and cover the latest optoelectronic applications that use lasing based on a variety of cavities, such as distributed feedback-type cavity. With contributions from a host of renowned international experts, this book explores the underlying processes in both existing and potential organic optoelectronic applications. It provides a broad overview of the scientific debate in the field of photophysics in organic semiconductors.

Organic Electronic Materials

Seminar on Organic Semiconductors - 40 Years, Mol. Cryst. Liq. Cryst. 171, pp. 1-356 (1989) 12. M. Pope, Ch.E. Swenberg, Electronic Processes in Organic ...

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Author: R. Farchioni

Publisher: Springer Science & Business Media

ISBN: 3540667210

Category: Science

Page: 448

View: 272

This review and tutorial offers a well-balanced survey of the fundamental ideas and relevant trends in modern research on both conducting polymers and organic molecular crystals. The reviews provide a more complete understanding of the underlying physics of the materials through the discussion of selected interconnected topics. The volume constitutes an insightful treatise and handy reference for researchers and students in the field.

Organic Semiconductors for Optoelectronics

Electronic Processes in Organic Crystals and Polymers, 2e. Oxford: Oxford University Press. 13 Kobayashi, T. (ed.) (1996). J-aggregates.

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Author: Hiroyoshi Naito

Publisher: John Wiley & Sons

ISBN: 9781119146100

Category: Science

Page: 384

View: 434

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.

Effects of Energetic Disorder on the Optoelectronic Properties of Organic Solar Cells

Ultrafast Long-Range Charge Separation in Organic Semiconductor Photovoltaic ... Köhler, A. & Bässler, H. Electronic Processes in Organic Semiconductors, ...

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Author: Nikolaos Felekidis

Publisher: Linköping University Electronic Press

ISBN: 9789176852712

Category:

Page: 60

View: 640

Organic photovoltaics (OPVs) is a promising low-cost and environmental-friendly technology currently achieving 12-14% power conversion efficiency. Despite the extensive focus of the research community over the last years, critical mechanisms defining the performance of OPVs are still topics of debate. While energetic disorder is known to be characteristic of organic semiconductors in general, its potential role in OPV has received surprisingly little attention. In this thesis we investigate some aspects of the relation between energetic disorder and several optoelectronic properties of OPV. Charge carrier mobility is a key parameter in characterizing the performance of organic semiconductors. Analyzing the temperature dependence of the mobility is also an oftenused method to obtain (estimates for) the energetic disorder in the HOMO and LUMO levels of an organic semiconductor material. Different formalisms to extract and analyze mobilities from space charge limited conductivity (SCLC) experiments are reviewed. Surprisingly, the Murgatroyd-Gill analytical model in combination with the Gaussian disorder model in the Boltzmann limit yields similar mobilities and energetic disorders as a more elaborate drift-diffusion model with parametrized mobility functionals. Common analysis and measurement errors are discussed. All the models are incorporated in an automated analysis freeware tool. The open circuit voltage (Voc) has attracted considerable interest as the large difference between Voc and the bandgap is the main loss mechanism in bulk heterojunction OPVs. Surprisingly, in ternary devices composed of two donors and one acceptor, the Voc is not pinned to the shallowest HOMO but demonstrates a continuous tunability between the binary extremities. We show that this phenomenon can be explained with an equilibrium model where Voc is defined as the splitting of the quasi-Fermi levels of the photo-created holes and electrons in a common density of states accounting for the stoichiometry, i.e. the ratio of the donor materials and the broadening by Gaussian disorder. Evaluating the PCE, it is found that ternary devices do not offer advantages over binary unless the fill factor (FF) is increased at intermediate compositions, as a result of improved transport/recombination upon material blending. Stressing the importance of material intermixing to improve the performance, we found that the presence of an acceptor may drastically alter the mobility and energetic disorder of the donor and vice versa. The effect of different acceptors was studied in a ternary onedonor- two-acceptors system, where the unpredictable variability with composition of the energetic disorder in the HOMO and the LUMO explained the almost linear tunability of Voc. Designing binary OPVs based on the design rule that the energetic disorder can be reduced upon material blending, as we observed, can yield a relative PCE improvement of at least 20%. CT states currently play a key role in evaluating the performance of OPVs and CTelectroluminescence (CT-EL) is assumed to stem from the recombination of thermalized electron-hole pairs. The varying width of the CT-EL peak for different material combinations is intuitively expected to reflect the energetic disorder of the effective HOMO and LUMO. We employ kinetic Monte Carlo (kMC) CT-EL simulations, using independently measured disorder parameters as input, to calculate the ground-to-ground state (0-0) transition spectrum. Including the vibronic broadening according to the Franck Condon principle, we reproduce the width and current dependence of the measured CT-EL peak for a large number of donor-acceptor combinations. The fitted dominant phonon modes compare well with the values measured using the spectral line narrowing technique. Importantly, the calculations show that CT-EL originates from a narrow, non-thermalized subset of all available CT states, which can be understood by considering the kinetic microscopic process with which electron-hole pairs meet and recombine. Despite electron-hole pairs being strongly bound in organic materials, the charge separation process following photo-excitation is found to be extremely efficient and independent of the excitation energy. However, at low photon energies where the charges are excited deep in the tail of the DOS, it is intuitively expected for the extraction yield to be quenched. Internal Quantum Efficiency (IQE) experiments for different material systems show both inefficient and efficient charge dissociation for excitation close to the CT energy. This finding is explained by kinetic Monte Carlo simulations accounting for a varying degree of e-h delocalization, where strongly bound localized CT pairs (< 2nm distance) are doomed to recombine at low excitation energies while extended delocalization over 3-5nm yields an increased and energy-independent IQE. Using a single material parameter set, the experimental CT electroluminescence and absorption spectra are reproduced by the same kMC model by accounting for the vibronic progression of the calculated 0-0 transition. In contrast to CT-EL, CT-absorption probes the complete CT manifold. Charge transport in organic solar cells is currently modelled as either an equilibrium or a non-equilibrium process. The former is described by drift-diffusion (DD) equations, which can be calculated quickly but assume local thermal equilibrium of the charge carriers with the lattice. The latter is described by kMC models, that are time-consuming but treat the charge carriers individually and can probe all relevant time and energy scales. A hybrid model that makes use of the multiple trap and release (MTR) concept in combination with the DD equations is shown to describe both steady-state space charge limited conductivity experiments and non-equilibrium time-resolved transport experiments using a single parameter set. For the investigated simulations, the DD-MTR model is in good agreement with kMC and ~10 times faster. Steady-state mobilities from DD equations have been argued to be exclusively relevant for operating OPVs while charge carrier thermalization and non-equilibrium time-dependent mobilities (although acknowledged) can be disregarded. This conclusion, based on transient photocurrent experiments with ?s time resolution, is not complete. We show that non-equilibrium kMC simulations can describe the extraction of charge carriers from subps to 100 ?s timescales with a single parameter set. The majority of the fast charge carriers, mostly non-thermalized electrons, are extracted at time scales below the resolution of the experiment. In other words, the experiment resolves only the slower fraction of the charges, predominantly holes.

Handbook of Organic Materials for Electronic and Photonic Devices

Intrinsic charge transport on the surface of organic semiconductors. Phys. Rev. Lett. 93 (086602). Pope, M., Swenberg, C.E., 1999. Electronic Processes in ...

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Author: Oksana Ostroverkhova

Publisher: Woodhead Publishing

ISBN: 9780081022856

Category: Technology & Engineering

Page: 911

View: 574

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

Progress in High Efficient Solution Process Organic Photovoltaic Devices

... energy transfer in polymers, charge transport in organic semiconductors, ... 4.1 Introduction Elementary electronic processes in organic and polymeric ...

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Author: Yang Yang

Publisher: Springer

ISBN: 9783662455098

Category: Technology & Engineering

Page: 417

View: 909

This book presents an important technique to process organic photovoltaic devices. The basics, materials aspects and manufacturing of photovoltaic devices with solution processing are explained. Solution processable organic solar cells - polymer or solution processable small molecules - have the potential to significantly reduce the costs for solar electricity and energy payback time due to the low material costs for the cells, low cost and fast fabrication processes (ambient, roll-to-roll), high material utilization etc. In addition, organic photovoltaics (OPV) also provides attractive properties like flexibility, colorful displays and transparency which could open new market opportunities. The material and device innovations lead to improved efficiency by 8% for organic photovoltaic solar cells, compared to 4% in 2005. Both academic and industry research have significant interest in the development of this technology. This book gives an overview of the booming technology, focusing on the solution process for organic solar cells and provides a state-of-the-art report of the latest developments. World class experts cover fundamental, materials, devices and manufacturing technology of OPV technology.

Physics of Organic Semiconductors

Lett., 358,144(2002) C.E. Pope and M. Swenberg, (1982), Electronic processes in organic crystals. Clarendon Press, Oxford.

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Author: Wolfgang Brütting

Publisher: John Wiley & Sons

ISBN: 9783527606795

Category: Science

Page: 554

View: 396

Filling the gap in the literature currently available, this book presents an overview of our knowledge of the physics behind organic semiconductor devices. Contributions from 18 international research groups cover various aspects of this field, ranging from the growth of organic layers and crystals, their electronic properties at interfaces, their photophysics and electrical transport properties to the application of these materials in such different devices as organic field-effect transistors, photovoltaic cells and organic light-emitting diodes. From the contents: * Excitation Dynamics in Organic Semiconductors * Organic Field-Effect Transistors * Spectroscopy of Organic Semiconductors * Interfaces between Organic Semiconductors and Metals * Analysis and Modeling of Devices * Exciton Formation and Energy Transfer in Organic Light Emitting Diodes * Deposition and Characterization

Ultrafast Infrared Vibrational Spectroscopy

In the first case, electronic processes in organic photovoltaics are described with ... For example, electrons or holes in crystalline semiconductors absorb ...

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Author: Michael D. Fayer

Publisher: CRC Press

ISBN: 9781466510142

Category: Science

Page: 487

View: 422

The advent of laser-based sources of ultrafast infrared pulses has extended the study of very fast molecular dynamics to the observation of processes manifested through their effects on the vibrations of molecules. In addition, non-linear infrared spectroscopic techniques make it possible to examine intra- and intermolecular interactions and how such interactions evolve on very fast time scales, but also in some instances on very slow time scales. Ultrafast Infrared Vibrational Spectroscopy is an advanced overview of the field of ultrafast infrared vibrational spectroscopy based on the scientific research of the leading figures in the field. The book discusses experimental and theoretical topics reflecting the latest accomplishments and understanding of ultrafast infrared vibrational spectroscopy. Each chapter provides background, details of methods, and explication of a topic of current research interest. Experimental and theoretical studies cover topics as diverse as the dynamics of water and the dynamics and structure of biological molecules. Methods covered include vibrational echo chemical exchange spectroscopy, IR-Raman spectroscopy, time resolved sum frequency generation, and 2D IR spectroscopy. Edited by a recognized leader in the field and with contributions from top researchers, including experimentalists and theoreticians, this book presents the latest research methods and results. It will serve as an excellent resource for those new to the field, experts in the field, and individuals who want to gain an understanding of particular methods and research topics.

Highly Efficient OLEDs

Electronic Processes in Organic Semiconductors. Wiley-VCH. 35 Schwoerer, M. and Wolf, H.C. ed. (2006). Organic Molecular Solids. Wiley-VCH.

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Author: Hartmut Yersin

Publisher: Wiley-VCH

ISBN: 9783527339006

Category: Technology & Engineering

Page: 608

View: 928

The essential resource that offers a comprehensive understanding of OLED optimizations Highly Efficient OLEDs. Materials Based on Thermally Activated Delayed Fluorescence (TADF) offers substantial information on the working principle of OLEDs and on new types of emitting materials (organic and inorganic). As the authors explain, OLEDs that use the Singlet-Harvesting mechanism based on the molecular property of TADF work according to a new exciton harvesting principle. Thus, low-cost emitter materials, such as Cu(I) or Ag(I) complexes as well as metal-free organic molecules, have the potential to replace high-cost rare metal complexes being currently applied in OLED technology. With contributions from an international panel of experts on the topic, the text shows how the application of new TADF materials allow for the development of efficient OLED displays and lighting systems. This new mechanism is the gateway to the third-generation of luminescent materials. This important resource: Offers a state-of-the-art compilation of the latest results in the dynamically developing field of OLED materials Is edited by a pioneer in the field of OLED material technology Contains a detailed application-oriented guide to new low-cost materials for displays and lighting Puts the focus on the emerging fields of OLED technology Written for materials scientists, solid state chemists, solid state physicists, and electronics engineers, Highly Efficient OLEDs. Materials Based on Thermally Activated Delayed Fluorescence offers a comprehensive resource to the latest advances of OLEDs based on new TADF materials.