Dynamics of Molecular Excitons Book

Dynamics of Molecular Excitons


  • Author : Seogjoo J. Jang
  • Publisher : Elsevier
  • Release Date : 2020-04-25
  • Genre: Science
  • Pages : 242
  • ISBN 10 : 9780081023365

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Dynamics of Molecular Excitons Excerpt :

Dynamics of Molecular Excitons provides a comprehensive, but concise description of major theories on the dynamics of molecular excitons, intended to serve as a self-contained resource on the topic. Designed to help those new to this area gain proficiency in this field, experts will also find the book useful in developing a deeper understanding of the subject. The starting point of the book is the standard microscopic definition of molecular Hamiltonians presented in commonly accepted modern quantum mechanical notations. Major assumptions and approximations involved in constructing Frenkel-type exciton Hamiltonians, which are well established, but are often hidden under arcane notations and approximations of old publications, are presented in detail. This will help quantum chemists understand the major assumptions involved in the definition of commonly used exciton models. Rate theories of exciton dynamics, such as Förster and Dexter theories and their modern generalizations, are presented in a unified and detailed manner. In addition, important aspects that are often neglected, such as local field effect and the role of fluctuating environments, are discussed. Various quantum dynamics methods allowing coherent dynamics of excitons are presented in a systematic manner in the context of quantum master equations or path integral formalisms. The author also provides a detailed theoretical explanation for the major spectroscopic techniques probing exciton dynamics, including modern two-dimensional electronic spectroscopy, with a critical assessment of the implications of these spectroscopic measurements. Finally, the book includes a brief overview of major applications including an explanation of organic photovoltaic materials and natural light harvesting complexes. Covers major theories of exciton dynamics in a consciously concise and easily readable way Bridges the gap between quantum dynamics working with phenomenological exciton Hamiltonian and quantum chemistry co

Dynamics of Molecular Excitons Book

Dynamics of Molecular Excitons


  • Author : Seogjoo Jang
  • Publisher : Nanophotonics
  • Release Date : 2020-06
  • Genre: Science
  • Pages : 300
  • ISBN 10 : 9780081023358

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Dynamics of Molecular Excitons Excerpt :

Dynamics of Molecular Excitons provides a comprehensive, but concise description of major theories on the dynamics of molecular excitons, intended to serve as a self-contained resource on the topic. Designed to help those new to this area gain proficiency in this field, experts will also find the book useful in developing a deeper understanding of the subject. The starting point of the book is the standard microscopic definition of molecular Hamiltonians presented in commonly accepted modern quantum mechanical notations. Major assumptions and approximations involved in constructing Frenkel-type exciton Hamiltonians, which are well established, but are often hidden under arcane notations and approximations of old publications, are presented in detail. This will help quantum chemists understand the major assumptions involved in the definition of commonly used exciton models. Rate theories of exciton dynamics, such as Förster and Dexter theories and their modern generalizations, are presented in a unified and detailed manner. In addition, important aspects that are often neglected, such as local field effect and the role of fluctuating environments, are discussed. Various quantum dynamics methods allowing coherent dynamics of excitons are presented in a systematic manner in the context of quantum master equations or path integral formalisms. The author also provides a detailed theoretical explanation for the major spectroscopic techniques probing exciton dynamics, including modern two-dimensional electronic spectroscopy, with a critical assessment of the implications of these spectroscopic measurements. Finally, the book includes a brief overview of major applications including an explanation of organic photovoltaic materials and natural light harvesting complexes.

Theory of Molecular Excitons Book

Theory of Molecular Excitons


  • Author : A. Davydov
  • Publisher : Springer
  • Release Date : 2013-11-11
  • Genre: Science
  • Pages : 313
  • ISBN 10 : 9781489951694

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Theory of Molecular Excitons Excerpt :

Molecular Excitation Dynamics and Relaxation Book

Molecular Excitation Dynamics and Relaxation


  • Author : Leonas Valkunas
  • Publisher : John Wiley & Sons
  • Release Date : 2013-10-04
  • Genre: Science
  • Pages : 470
  • ISBN 10 : 9783527653676

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Molecular Excitation Dynamics and Relaxation Excerpt :

This work brings together quantum theory and spectroscopy to convey excitation processes to advanced students and specialists wishing to conduct research and understand the entire fi eld rather than just single aspects. Written by experienced authors and recognized authorities in the field, this text covers numerous applications and offers examples taken from different disciplines. As a result, spectroscopists, molecular physicists, physical chemists, and biophysicists will all fi nd this a must-have for their research. Also suitable as supplementary reading in graduate level courses.

Electronic Excitations in Organic Based Nanostructures Book

Electronic Excitations in Organic Based Nanostructures


  • Author : Anonim
  • Publisher : Elsevier
  • Release Date : 2003-11-13
  • Genre: Technology & Engineering
  • Pages : 508
  • ISBN 10 : 0080519210

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Electronic Excitations in Organic Based Nanostructures Excerpt :

The first book devoted to a systematic consideration of electronic excitations and electronic energy transfer in organic crystalline multilayers and organics based nanostructures(quantum wells, quantum wires, quantum dots, microcavities). The ingenious combination of organic with inorganic materials in one and the same hybrid structure is shown to give qualitatively new opto-electronic phenomena, potentially important for applications in nonlinear optics, light emitting devices, photovoltaic cells, lasers and so on. The book will be useful not only for physicists but also for chemists and biologists.To help the nonspecialist reader, three Chapters which contain a tutorial and updated introduction to the physics of electronic excitations in organic and inorganic solids have been included. * hybrid Frenkel-Wannier-Mott excitons * microcavities with crystalline and disordered organics * electronic excitation at donor-acceptor interfaces * cold photoconductivity at donor-acceptor interface * cummulative photovoltage * Feorster transfer energy in microcavity * New concepts for LEDs

Biophysical Chemistry Book

Biophysical Chemistry


  • Author : Robin Leatherbarrow
  • Publisher : Royal Society of Chemistry
  • Release Date : 2007-10-31
  • Genre: Science
  • Pages : 290
  • ISBN 10 : 9781847550255

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Biophysical Chemistry Excerpt :

In the post-genomic world, advances in the comprehension of cell behaviour will depend upon scientists deciphering the molecular basis of interactions between proteins and membranes. Bringing together contributions from chemists, biologists and physicists, Biophysical Chemistry: Membranes and Proteins demonstrates how multidisciplinary teams can gain insights into understanding complex biological systems. This book reflects both the scope and the interdisciplinary nature of the field, with topics including: modelling of biological systems; membrane structure and interactions; probing biomolecules; and channels and receptors. Full of stimulating articles and opinions, readers from academia and industry will welcome the wide range of coverage and the state-of-the-art science.

Excitonic Processes in Solids Book

Excitonic Processes in Solids


  • Author : Masayasu Ueta
  • Publisher : Springer Science & Business Media
  • Release Date : 2012-12-06
  • Genre: Science
  • Pages : 530
  • ISBN 10 : 9783642826023

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Excitonic Processes in Solids Excerpt :

An exciton is an electronic excitation wave consisting of an electron-hole pair which propagates in a nonmetallic solid. Since the pioneering research of Fren kel, Wannier and the Pohl group in the 1930s, a large number of experimental and theoretical studies have been made. Due to these investigations the exciton is now a well-established concept and the electronic structure has been clarified in great detail. The next subjects for investigation are, naturally, dynamical processes of excitons such as excitation, relaxation, annihilation and molecule formation and, in fact, many interesting phenomena have been disclosed by recent works. These excitonic processes have been recognized to be quite important in solid-state physics because they involve a number of basic interactions between excitons and other elementary excitations. It is the aim of this quasi monograph to describe these excitonic processes from both theoretical and experimental points of view. we take a few To discuss and illustrate the excitonic processes in solids, important and well-investigated insulating crystals as playgrounds for excitons on which they play in a manner characteristic of each material. The selection of the materials is made in such a way that they possess some unique properties of excitonic processes and are adequate to cover important interactions in which excitons are involved. In each material, excitonic processes are described in detail from the experimental side in order to show the whole story of excitons in a particular material.

Primary Photoexcitations in Conjugated Polymers  Molecular Exciton Versus Semiconductor Band Model Book

Primary Photoexcitations in Conjugated Polymers Molecular Exciton Versus Semiconductor Band Model


  • Author : Niyasi Serdar Sariciftci
  • Publisher : World Scientific
  • Release Date : 1998-01-02
  • Genre: Science
  • Pages : 640
  • ISBN 10 : 9789814518215

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Primary Photoexcitations in Conjugated Polymers Molecular Exciton Versus Semiconductor Band Model Excerpt :

This volume concentrates on the controversy within the scientific community over how to explain, understand and describe the photophysics/photochemistry of this class of materials. This controvery is of such a fundamental nature that the solution of the problem might be in a unification of the semiconductor and metal physics with the molecular quantum chemistry. Thus, a wide-ranging and comprehensive discussion of this very crucial issue has not been written down yet. This volume brings together the most prominent scientists specializing in this controversial topic. Each contributor addresses the opponents' arguments. After short introductory chapters, the contributors discuss their own speciality area and compare the results with both models and explain their position on why one of the models is more appropriate. Special emphasis is given to comparative discussions with other conjugated molecular systems as well as inorganic semiconductors. Contents:Correlations in Conjugated Polymers (Z G Soos et al.)Nature of the Primary Photo-Excitations in Poly(Arylene-Vinylenes): Bound Neutral Excitons or Charged Polaron Pairs (A J Heeger)Excitons in Conjugated Polymers (H Bässler)Intramolecular Excitons and Intermolecular Polaron Pairs as Primary Photoexcitations in Conjugated Polymers (E Conwell)Excitonic Effects in the Linear and Nonlinear Optical Properties of Conjugated Polymers (S Abe)Bound Polaron Pair Formation in Poly(Phenylenevinylenes) (L Rothberg)Luminescence Efficiency and Time-Dependence: Insights into the Nature of the Emitting Species in Conjugated Polymers (I D W Samuel et al.)Mechanism of Carrier Generation in the Class of Low Mobility Materials: Transient Photoconductivity and Photoluminescence at High Electric Fields (D Moses)Photoluminescence Spectroscopy as a Probe for Disorder and Excitonic Effects in Organic and Inorganic Semiconductors (U Lemmer & E O Göbel)Spectroscopy on Conjugated Polymer Devices (V Dyakonov)Spin-Dependent Recombination Processes

Photosynthetic Excitons Book

Photosynthetic Excitons


  • Author : Herbert van Amerongen
  • Publisher : World Scientific
  • Release Date : 2000
  • Genre: Science
  • Pages : 590
  • ISBN 10 : 9810232802

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Photosynthetic Excitons Excerpt :

Excitons are considered as the basic concept used by describing the spectral properties of photosynthetic pigment-protein complexes and excitation dynamics in photosynthetic light-harvesting antenna and reaction centers. Following the recently obtained structures of a variety of photosynthetic pigment-protein complexes from plants and bacteria our interest in understanding the relation between structure, function and spectroscopy has strongly increased. These data demonstrate a short interpigment distance (of the order of 1 nm or even smaller) and/or a highly symmetric (ring-like) arrangement of pigment molecules in peripheral light-harvesting complexes of photosynthetic bacteria. Books which were devoted to the exciton problem so far mainly considered the spectral properties of molecular crystals. However, the small size of these pigment aggregates in the pigment-protein complexes as well as the role of the protein, which is responsible for the structural arrangement of the complex, clearly will have a dramatic influence on the pigment spectra and exciton dynamics. All these aspects of the problem are considered in this book. Exciton theory is mainly considered for small molecular aggregates (dimers, ring-like structures etc.). Together with the theoretical description of the classical conceptual approach, which mainly deals with polarization properties of the absorption and fluorescence spectra, the nonlinear femtosecond spectroscopy which is widely used for investigations now is also discussed. A large part of the book demonstrates the excitonic effects in a multitude of photosynthetic pigment-protein complexes and how we can understand these properties on the basis of the exciton concept.

Energy Transfer Processes in Condensed Matter Book

Energy Transfer Processes in Condensed Matter


  • Author : Baldassare Dibartolo
  • Publisher : Springer Science & Business Media
  • Release Date : 2012-12-06
  • Genre: Science
  • Pages : 696
  • ISBN 10 : 9781461324072

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Energy Transfer Processes in Condensed Matter Excerpt :

This book presents an account of the NATO Advanced Study Institute on "Energy Transfer Processes in Condensed Matter", held in Erice, Italy, from June 16 to June 30, 1983. This meeting was organized by the International School of Atomic and Molecular Spectroscopy of the "Ettore Majorana" Centre for Scientific Culture. The objective of the Institute was to present a comprehensive treatment of the basic mechanisms by which electronic excitation energy, initially localized in a particular constituent or region of a condensed material, transfers itself to the other parts of the system. Energy transfer processes are important to such varied .fields as spectroscopy, lasers, phosphor technology, artificial solar energy conversion, and photobiology. This meeting was the first encounter of this sort entirely dedicated to this important topic. A total of 65 participants came from 47 laboratories and 16 nations (Belgium, Czechoslovakia, F.R. of Germany, France, Greece, India, Ireland, Israel, Italy, The Netherlands, Poland, Portugal, Switzerland, Turkey, United Kingdom, and the United States of A America). The secretaries of the course were: Ms. Aliki Karipidou for the scientific aspects and Mr. Massimo Minella for the admini strative aspects of the meeting.

Disorder Effects on Relaxational Processes Book

Disorder Effects on Relaxational Processes


  • Author : Ranko Richert
  • Publisher : Springer Science & Business Media
  • Release Date : 2012-12-06
  • Genre: Science
  • Pages : 754
  • ISBN 10 : 9783642785764

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Disorder Effects on Relaxational Processes Excerpt :

The field of non-crystalline materials has seen the emergence of many challeng ing problems during its long history. In recent years, the interest in polymeric and biological disordered matter has stimulated new activities which in turn have enlarged the organic and inorganic glass community. The current research fields and recent progress have extended our knowledge of the rich phenomenol ogy of glassy systems, where the role of disorder is fundamental for the underlying microscopic dynamics. In addition, despite the lack of a unified theory, many interesting theoretical models have recently evolved. The present volume offers the reader a collection of topics representing the current state in the understanding of disorder effects as well as a survey of the basic problems and phenomena involved. The task of compiling a book devoted to disordered systems has benefited much from a seminar organized by the W.-E. Heraeus Foundation in Bad Honnef in April 1992, where we had the opportunity to discuss the project with most of the authors. Here we wish to thank the Heraeus Foundation for their support, and the authors and Springer-Verlag, especially Dr. Marion Hertel, for the pleasant cooperation.

Molecular Interactions Book

Molecular Interactions


  • Author : David A. Micha
  • Publisher : John Wiley & Sons
  • Release Date : 2019-11-18
  • Genre: Science
  • Pages : 400
  • ISBN 10 : 9781119319078

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Molecular Interactions Excerpt :

A modern, comprehensive text and reference describing intermolecular forces, this book begins with coverage of the concepts and methods for simpler systems, then moves on to more advanced subjects for complex systems – emphasizing concepts and methods used in calculations with realistic models and compared with empirical data. Contains applications to many physical systems and worked examples Proceeds from introductory material to advanced modern treatments Has relevance for new materials, biological phenomena, and energy and fuels production

The Physics of Solar Energy Conversion Book

The Physics of Solar Energy Conversion


  • Author : Juan Bisquert
  • Publisher : CRC Press
  • Release Date : 2020-06-09
  • Genre: Science
  • Pages : 470
  • ISBN 10 : 9780429000140

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The Physics of Solar Energy Conversion Excerpt :

Research on advanced energy conversion devices such as solar cells has intensified in the last two decades. A broad landscape of candidate materials and devices were discovered and systematically studied for effective solar energy conversion and utilization. New concepts have emerged forming a rather powerful picture embracing the mechanisms and limitation to efficiencies of different types of devices. The Physics of Solar Energy Conversion introduces the main physico-chemical principles that govern the operation of energy devices for energy conversion and storage, with a detailed view of the principles of solar energy conversion using advanced materials. Key Features include: Highlights recent rapid advances with the discovery of perovskite solar cells and their development. Analyzes the properties of organic solar cells, lithium ion batteries, light emitting diodes and the semiconductor materials for hydrogen production by water splitting. Embraces concepts from nanostructured and highly disordered materials to lead halide perovskite solar cells Takes a broad perspective and comprehensively addresses the fundamentals so that the reader can apply these and assess future developments and technologies in the field. Introduces basic techniques and methods for understanding the materials and interfaces that compose operative energy devices such as solar cells and solar fuel converters.