Author: Laura SmilowitzPublisher:
ISBN:
Category :
Languages : en
Pages : 278
Book Description
Photoexcitation Spectroscopy of Conjugated Polymers
Author: Laura SmilowitzPrimary Photoexcitations In Conjugated Polymers: Molecular Exciton Versus Semiconductor Band Model
Author: Niyasi Serdar SariciftciPublisher: World Scientific
ISBN: 9814518212
Category : Science
Languages : en
Pages : 641
Book Description
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.
Multi Frequency EPR Spectroscopy of Conjugated Polymers and Their Nanocomposites
Author: Victor I. KrinichnyiPublisher: CRC Press
ISBN: 1498779654
Category : Science
Languages : en
Pages : 315
Book Description
Conjugated polymeric materials and their nanocomposites are widely used for the creation of alternative sources of renewable energy, cell phone screens, mobile gadgets, video players and OLED-TV, as well as organic diodes, transistors, sensors, etc. with field-dependent and spin-assisted electronic properties. Multifrequency EPR Spectroscopy methods can help researchers optimize their structural, magnetic and electronic properties for the creation of more efficient molecular devices. This book will acquaint the reader with the basic properties of conjugated polymers, the fundamentals of EPR Spectroscopy, and the information that can be obtained at different wavebands of EPR spectroscopy.
Elementary Photoexcitations in Conjugated Polymers Studied by Optical Spectroscopy and Photoconductivity
Author: Cesare SociOptical Probes of Conjugated Polymers
Author: Z. V. VardenyPublisher: SPIE-International Society for Optical Engineering
ISBN:
Category : Science
Languages : en
Pages : 566
Book Description
Measurements of Photo-induced Changes in Conjugated Polymers
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 15
Book Description
We have used the highly sensitive technique of Photothermal Deflection Spectroscopy (PDS) to measure changes in the infrared absorption spectra of MEHPPV, P3HT and Polydiacetylene-4BCMU induced by pumping these polymers with light above the?--?* transition energy. In contrast to previous chopped light transmission measurements of these effects, the PDS technique can directly measure the buildup or decay of the absorption coefficient,?, on the time scale of second to days. In the case of MEHPPV we observe that the time scale of seconds to days. In the case of MEHPPV we observe that above-gap light causes the appearance of a broad infrared peak in?, which continues to grow-in hours after the pump light is first applied. For this polymer the general shape of the absorption spectra in the unpumped state mimics the photo-induced changes, suggesting that remnant photo-induced states determine the maximum transparency observed under normal experimental conditions. For P3HT and to a lesser extent, MEHPPV, we also observe irreversible photo-induced absorption components which we tentatively identify with photo-induced oxidation of the polymer matrix. 10 refs., 8 figs.
Investigating the Photochemistry and Photophysics of Conjugated Polymers by Single Molecule Spectroscopy
Author: Dehong HuConjugated Polymers
Author: Terje A. SkotheimPublisher: CRC Press
ISBN: 1420043617
Category : Technology & Engineering
Languages : en
Pages : 664
Book Description
Many significant fundamental concepts and practical applications have developed since the publication of the best-selling second edition of the Handbook of Conducting Polymers. Now divided into two books, the third edition continues to retain the excellent expertise of the editors and world-renowned contributors while providing superior coverage of
Spectroscopic Techniques for Polymer Characterization
Author: Yukihiro OzakiPublisher: John Wiley & Sons
ISBN: 3527830324
Category : Science
Languages : en
Pages : 500
Book Description
An insightful exploration of cutting-edge spectroscopic techniques in polymer characterization In Spectroscopic Techniques for Polymer Characterization: Methods, Instrumentation, Applications, a team of distinguished chemists delivers a comprehensive exploration of the vast potential of spectroscopic characterization techniques in polymer research. The book offers a concise outline of the principles, advantages, instrumentation, experimental techniques, and noteworthy applications of cutting-edge spectroscopy. Covering a wide range of polymers, from nylon to complex polymeric nanocomposites, the author presents recent developments in polymer science to polymer, analytical, and material chemists, assisting them in keeping track of the progress in modern spectroscopy. Spectroscopic Techniques for Polymer Characterization contains contributions from pioneers in modern spectroscopic techniques from around the world. The included materials bridge the gap between spectroscopists, polymer scientists, and engineers in academia and industry. The book also offers: A thorough introduction to the progress in spectroscopic techniques, including polymer spectroscopy and near-infrared spectroscopy Comprehensive explorations of topical polymers studied by spectroscopy, including polymer thin films, fluoropolymers, polymer solutions, conductive polymers Practical discussions of infrared imaging, near-infrared imaging, two-dimensional correlation spectroscopy, and far-ultraviolet spectroscopy In-depth examinations of spectroscopic studies of weak hydrogen bonding in polymers Spectroscopic Techniques for Polymer Characterization: Methods, Instrumentation, Applications is a must-read reference for polymer, analytical, and physical chemists, as well as materials scientists and spectroscopists seeking a one-stop resource for polymer characterization using spectroscopic analyses.
Ensemble and Single Molecule Spectroscopy of Conjugated Polymers
Author: Emma HooleyPublisher:
ISBN:
Category : Charge transfer
Languages : en
Pages : 274
Book Description