Molecular Engineering Of Polymer Semiconductors For Electronics And Photonics

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Molecular Engineering of Polymer Semiconductors for Electronics and Photonics

Author : Ye-Jin Hwang
Publisher :
ISBN 13 :
Total Pages : 222 pages
Book Rating : 4.:/5 (932 download)

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Book Synopsis Molecular Engineering of Polymer Semiconductors for Electronics and Photonics by : Ye-Jin Hwang

Download or read book Molecular Engineering of Polymer Semiconductors for Electronics and Photonics written by Ye-Jin Hwang and published by . This book was released on 2015 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: There has been tremendous progress in the development of conjugated polymer semiconductors in the last two decades for diverse applications in organic electronics and photonics. Most notably, advances in p-type (hole-conducting) polymers have enabled the development of high-performance organic field-effect transistors (OFETs) as well as more efficient fullerene-based organic photovoltaics (OPVs). In contrast, n-type (electron-conducting) polymer semiconductors remain relatively scarce and consequently the performance of n-channel OFETs and all-polymer solar cells has lagged far behind p-channel OFETs and fullerene-based OPVs. This dissertation mainly focuses on the design and synthesis of new n-type polymer semiconductors for device applications in n-channel OFETs and non-fullerene OPVs. It aims to achieve better understanding of the relationships between molecular structure, processing, morphology, and device performance. New n-type polymer semiconductors were developed based on strong electron withdrawing naphthalene diimide (NDI) building block with various selenophene derivatives as co-monomers. The resulting highly crystalline poly(naphthalene diimide)s (PNDIs) gave the electron mobility as high as 0.24 cm2/Vs in n-channel OFET measurements in air which is comparable or even higher mobility compared to most of the p-channel transistors. Using NDI-selenophene copolymer, PNDIS-HD, as acceptor, a photovoltaic performance with a power conversion efficiency (PCE) of 3.3 % (Jsc = 7.78 mA/cm2, Voc = 0.76 V, FF = 0.55) was achieved in all-polymer solar cells, and this work has stimulated a lot of current interest in fullerene-free OPVs. In further studies in all-polymer solar cells, highly enhanced photovoltaic performance was achieved by chemical modifications of acceptor polymers and controlling self-organization kinetics of polymer/polymer blend films. From these studies, a critical role of the bulk crystallinity of acceptor polymer was revealed, and provided an important criterion for the molecular design of high performance polymer acceptors. Furthermore, all-polymer solar cells with more favorable bulk morphology by slow self-organization of polymers facilitated by room temperature film aging resulted in enhanced charge carrier mobility and photocurrent. Resulting all-polymer solar cells with PCE over 7 % showed a great potential of non-fullerene solar cells and demonstrated for the first time a viable alternative pathway to organic photovoltaics.

Polymers for Electronic & Photonic Application

Author : C. P. Wong
Publisher : Elsevier
ISBN 13 : 1483289397
Total Pages : 676 pages
Book Rating : 4.4/5 (832 download)

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Book Synopsis Polymers for Electronic & Photonic Application by : C. P. Wong

Download or read book Polymers for Electronic & Photonic Application written by C. P. Wong and published by Elsevier. This book was released on 2013-10-22 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most recent advances in the use of polymeric materials by the electronic industry can be found in Polymers for Electronic and Photonic Applications. This bookprovides in-depth coverage of photoresis for micro-lithography, microelectronic encapsulants and packaging, insulators, dielectrics for multichip packaging,electronic and photonic applications of polymeric materials, among many other topics. Intended for engineers and scientists who design, process, and manufacturemicroelectronic components, this book will also prove useful for hybrid and systems packaging managers who want to be informed of the very latest developments inthis field. * Presents most recent advances in the use of polymeric materials by the electronic industry* Contributions by foremost experts in the field

Handbook of Advanced Electronic and Photonic Materials and Devices, Ten-Volume Set

Author : Hari Singh Nalwa
Publisher : Academic Press
ISBN 13 : 0125137451
Total Pages : 383 pages
Book Rating : 4.1/5 (251 download)

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Book Synopsis Handbook of Advanced Electronic and Photonic Materials and Devices, Ten-Volume Set by : Hari Singh Nalwa

Download or read book Handbook of Advanced Electronic and Photonic Materials and Devices, Ten-Volume Set written by Hari Singh Nalwa and published by Academic Press. This book was released on 2000-10-09 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vol. 1: Semiconductors;Vol. 2: Semiconductors Devices;Vol. 3: High-Tc Superconductors and Organic Conductors; Vol. 4: Ferroelectrics and Dielectrics; Vol. 5: Chalcogenide Glasses and Sol-Gel Materials; Vol. 6 Nanostructured Materials; Vol. 7: Liquid Crystals, Display and Laser Materials; Vol. 8: Conducting Polymers; Vol. 9: Nonlinear Optical Materials; Volume 10: Light-Emitting Diodes, Lithium Batteries and Polymer Devices

Semiconducting Polymers

Author : Georges Hadziioannou
Publisher : John Wiley & Sons
ISBN 13 : 3527312714
Total Pages : 786 pages
Book Rating : 4.5/5 (273 download)

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Book Synopsis Semiconducting Polymers by : Georges Hadziioannou

Download or read book Semiconducting Polymers written by Georges Hadziioannou and published by John Wiley & Sons. This book was released on 2006-12-15 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of semiconducting polymers has attracted many researchers from a diversity of disciplines. Printed circuitry, flexible electronics and displays are already migrating from laboratory successes to commercial applications, but even now fundamental knowledge is deficient concerning some of the basic phenomena that so markedly influence a device's usefulness and competitiveness. This two-volume handbook describes the various approaches to doped and undoped semiconducting polymers taken with the aim to provide vital understanding of how to control the properties of these fascinating organic materials. Prominent researchers from the fields of synthetic chemistry, physical chemistry, engineering, computational chemistry, theoretical physics, and applied physics cover all aspects from compounds to devices. Since the first edition was published in 2000, significant findings and successes have been achieved in the field, and especially handheld electronic gadgets have become billion-dollar markets that promise a fertile application ground for flexible, lighter and disposable alternatives to classic silicon circuitry. The second edition brings readers up-to-date on cutting edge research in this field.

Molecular Engineering on Semiconducting Polymers for Enhancing Solar Cell Performance

Author : Wei-Hsuan Chang
Publisher :
ISBN 13 :
Total Pages : 159 pages
Book Rating : 4.:/5 (17 download)

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Book Synopsis Molecular Engineering on Semiconducting Polymers for Enhancing Solar Cell Performance by : Wei-Hsuan Chang

Download or read book Molecular Engineering on Semiconducting Polymers for Enhancing Solar Cell Performance written by Wei-Hsuan Chang and published by . This book was released on 2016 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: A promising solution to address the present-day energy crisis is photovoltaic technology. Currently, the market is dominated by inorganic-based materials such as silicon, III-V semiconductors, CIGS, etc. Despite their technical maturity, the energy generated from these devices is still low. This is partially due to the high production cost of these materials. Therefore, the search for next generation photovoltaic technologies that utilize earth-abundant elements with low-cost production processes has been an intensive research area. Using solution-processable organic polymer semiconductors, polymer solar cells provide an opportunity to efficiently generate energy from sunlight at a reasonable cost. This is due to the ease of synthesis/modification of organic molecules and polymers compared to that of inorganic materials, the easily scalable solution-based fabrication process, and the use of cost-effective, environmentally friendly carbon-based elements. Owing to the vast research efforts over the past decade, the power conversion efficiencies of single- and multi-junction polymer solar cells have recently surpassed the 10% milestone. During this progression, materials development, driven by the desire to overcome the constraint of P3HT, has played a very important role in advancing the technology. To date, hundreds of photovoltaic polymers have been made through different combinations of conjugated building blocks and suitable functional groups. As a result, several state-of-the-art polymers, such as PTB7, PDPP3T, PBDTDPP and PffBT4T, have shown impressive performance. In order to keep this momentum going, further improvements and deeper insights into materials' property are certainly needed. In this dissertation, we particularly focus on improving the properties of several state-of-the-art photovoltaic polymers by resolving their shortcomings using innovative organic synthetic approaches. It is demonstrated that the materials' optoelectronic property as well as their fabrication process can be alternated through chemistry modification at a molecular scale, that is, by molecule engineering. This study paves a way not only to achieve high performance polymer solar cells, but also to provide novel synthetic strategies for researchers in the field to further push the boundaries of polymer solar cell technology in the future.

Handbook of Advanced Electronic and Photonic Materials and Devices: Conducting polymers

Author : Hari Singh Nalwa
Publisher :
ISBN 13 :
Total Pages : 396 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Handbook of Advanced Electronic and Photonic Materials and Devices: Conducting polymers by : Hari Singh Nalwa

Download or read book Handbook of Advanced Electronic and Photonic Materials and Devices: Conducting polymers written by Hari Singh Nalwa and published by . This book was released on 2001 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electronic and photonic materials discussed in this handbook are the key elements of continued scientific and technological advances in the 21st century. The electronic and photonic materials comprising this handbook include semiconductors, superconductors, ferroelectrics, liquid crystals, conducting polymers, organic and superconductors, conductors, nonlinear optical and optoelectronic materials, electrochromic materials, laser materials, photoconductors, photovoltaic and electroluminescent materials, dielectric materials, nanostructured materials, supramolecular and self-asemblies, silicon and glasses, photosynthetic and respiratory proteins, etc, etc. Some of these materials have already been used and will be the most important components of the semiconductor and photonic industries, computers, internet, information processing and storage, telecommunications, satellite communications, integrated circuits, photocopiers, solar cells, batteries, light-emitting diodes, liquid crystal displays, magneto-optic memories, audio and video systems, recordable compact discs, video cameras, X-ray technology, color imaging, printing, flat-panel displays, optical waveguides, cable televisions, computer chips, molecular-sized transistors and switches, as well as other emerging cutting edge technologies. Electronic and photonic materials are expected to grow to a trillion-dollar industry in the new millennium and will be the most dominating forces in the emerging new technologies in the fields of science and engineering. This handbook is a unique source of the in-depth knowledge of synthesis, processing, fabrication, spectroscopy, physical properties and applications of electronic and photonic materials covering everything for today's and developing future technologies. This handbook consists of over one hundred state-of-the-art review chapters written by more than 200 world leading experts from 25 different countries. With more than 23,000 bibliographic citations and several thousands of figures, tables, photographs, chemical structures and equations, this handbook is an invaluable major reference source for scientists and students working in the field of materials science, solid-state physics, chemistry, electrical and optical engineering, polymer science, device engineering and computational engineering, photophysics, data storage and information technology and technocrats, everyone who is involved in science and engineering of electronic and photonic materials. Key Features * This is the first handbook ever published on electronic and photonic materials * 10 volumes summarize the advances in electronic and photonic materials made over past the two decades * This handbook is a unique source of the in-depth knowledge of synthesis, processing, spectroscopy, physical properties and applications of electronic and photonic materials * Over 100 state-of-the-art review chapters written by more than 200 leading experts from 25 different countries * About 25,000 bibliographic citations and several thousand figures, tables, photographs, chemical structures and equations * Easy access to electronic and photonic materials from a single reference * Each chapter is self-contained with cross references * Single reference having all inorganic, organic and biological materials * Witten in very clear and concise fashion for easy understanding of structure property relationships in electronic and photonic materials

Semiconducting Polymer Materials for Biosensing Applications

Author : Kuan Yew Cheong
Publisher : Elsevier
ISBN 13 : 0323951066
Total Pages : 404 pages
Book Rating : 4.3/5 (239 download)

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Book Synopsis Semiconducting Polymer Materials for Biosensing Applications by : Kuan Yew Cheong

Download or read book Semiconducting Polymer Materials for Biosensing Applications written by Kuan Yew Cheong and published by Elsevier. This book was released on 2024-01-26 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconducting Polymer Materials for Biosensing Applications provides a comprehensive look at semiconducting polymer materials and their deposition, characterization and use in biosensors. The book begins with an introduction to the key materials and background of essential technologies. Major types of monomer chemistries and fabrication of polymer materials are discussed, with a focus on semiconducting films suitable for use in (bio)sensors. A survey of the state-of-the-art for organic thin-film polymer semiconductor sensor-based fabrication methods for materials and devices covers a wide range of chemical, material, physical and advanced fabrication techniques. The book concludes with a chapter on theoretical insights for designing sensors, (bio)sensors for medical, food and environmental applications and the future of sensors. This book is suitable for materials scientists and engineers and biomedical engineers in academia or industry. Reviews the most promising semiconductor polymer materials, such as conjugated polymers most frequently used in biosensing applications Provides an overview of the electrochemical techniques to process semiconductor polymer materials Discusses the use of semiconductor polymer-based biosensors in biomedical, environmental, chemical and aerospace applications

Photosensitive Polyimides

Author : Takashi Yamashita
Publisher : Routledge
ISBN 13 : 1351424750
Total Pages : 344 pages
Book Rating : 4.3/5 (514 download)

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Book Synopsis Photosensitive Polyimides by : Takashi Yamashita

Download or read book Photosensitive Polyimides written by Takashi Yamashita and published by Routledge. This book was released on 2017-10-19 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book to provide an in-depth presentation of photosensitive polyimides for electronic and photonic applications. The authors are leading specialists in this field from Japan, Europe and the U.S. From the Preface Aromatic polyimides were developed originally as thermostable flexible polymer films for space applications. Now polyimides have found widespread use in the manufacture of electronic devices and have been employed in increasingly diverse areas of electronics and information technology. In addition to their excellent thermal stability and high processability, a wide range of chemical and physical properties provided by molecular engineering makes polyimides highly versatile in the electronics and information industries. Lithography of polyimides is an inevitable process in using polyimides for microelectronic fields, and hence increasing research has been devoted to developing photosensitive polyimides, which make it unnecessary to use photoresists for patterning polyimides and diminishing markedly the number of steps in fabrication of various electronic devices. In addition, the development of technology of photosensitive polyimides is expected to play a great role in manufacturing photonic devices in the near future, when the design and control of hyper fine structures . . . including higher thermal stability and better processability would be essential.

Molecular Design Principles of Deformable Polymer Semiconductors for Soft Electronics

Author : Jaewan Mun
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (122 download)

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Book Synopsis Molecular Design Principles of Deformable Polymer Semiconductors for Soft Electronics by : Jaewan Mun

Download or read book Molecular Design Principles of Deformable Polymer Semiconductors for Soft Electronics written by Jaewan Mun and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the discovery of semiconducting conjugated polymers, their electrical properties have evolved tremendously. Their mobility can now exceeds that of amorphous silicon (1 cm2 V-1 s-1), making them attractive candidates for commercial use. In addition, with the recent interest in soft electronics, their intrinsic softness has attracted enormous attention. However, it remains highly challenging to achieve a polymer system possessing both high mobility and mechanical deformability. While ordered microstructures are desirable for efficient charge transport, amorphous counterparts are also essential to confer high mechanical deformability. Thus, this limitation necessitates precise molecular-level engineering of semiconducting polymers for soft electronics applications. This work contributes to the understanding of deformable semiconductors at the molecular level by exploring various design principles and examining their effects on microstructures and film properties. First, conjugation breakers are introduced to improve the ductility of polymer semiconductors without significant compromise of mobility. We discover that polymer crystallinity is greatly reduced by dynamic behaviors of the non-conjugated spacers, thereby enhancing the film ductility. Also, tie-chains of high molecular weight polymer chains enable efficient charge transport and relatively high mobility. The effects of conjugation breaker, i.e. flexibility, on the mechanical properties of semiconducting thin films are also examined. We show that more flexible spacers result in more ductile semiconducting thin films with lower elastic modulus. This study hence establishes the fundamental structure-property relationships of conjugation breakers. Second, we discuss the use of conjugated carbon nanorings as molecular additives for stretchable semiconductors. The conjugation of the additives is observed to enable efficient charge transport between host semiconductor chains and the additives, while the cyclic structures interrupt intermolecular interactions and reduced crystallinity of the polymer chains. As a result, the nanoring additives effectively improve stretchability of polymeric semiconductors without compromising the mobility. In addition, the nanoring additives improve the ductility of several different semiconducting polymers, hence confirming the general applicability of this additive-based approach. Fully stretchable transistors fabricated using our developed semiconductor-additive blend films exhibit high initial mobility as well as mobility retention capabilities under strain and after repeated strains. Third, a molecular p-type dopant is introduced as an additive to impart polymer semiconductors with high mobility, stability, and ductility. We find that charge transfer between the dopant and host semiconductor molecules results in improved mobility and stability, while reduced crystallinity from the additive leads to enhanced stretchability. In a fully stretchable transistor, the doped semiconductor films exhibit significantly improved stability, initial mobility, and mobility retention under strain. This is the first report that enables the simultaneous improvement of the above three desirable properties. Next, a fully conjugated donor-acceptor terpolymer design is presented. The fully conjugated backbone and strong aggregation allow for efficient intra- and inter-chain charge transport, respectively, while reduced crystallization arises from backbone irregularity of the terpolymers. The semiconducting terpolymers exhibit superior ductility as compared to semiconductor-blend films that suffer from phase separations. The terpolymer design is applicable to different donor and acceptor combinations, and we observe record high mobility retention in a fully stretchable transistor. We conclude this work by summarizing the current understanding on stretchable semiconductors and offering future outlooks. Collectively, this work provides molecular design principles of deformable semiconducting polymers, especially from their microstructure perspectives. With increasing needs for mechanically compliant electronic materials and devices, this work offers guidelines for future research on stretchable polymer semiconductors.

Polymers for Photonics Applications I

Author : K.-S. Lee
Publisher : Springer Science & Business Media
ISBN 13 : 3540423842
Total Pages : 273 pages
Book Rating : 4.5/5 (44 download)

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Book Synopsis Polymers for Photonics Applications I by : K.-S. Lee

Download or read book Polymers for Photonics Applications I written by K.-S. Lee and published by Springer Science & Business Media. This book was released on 2002-01-11 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two special volumes of Advances in Polymer Science entitled "Polymers for Photonics Applications" provide authoritative and critical reviews of up-to-date research and advances in various fields of photonic polymers as well as their promising applications. Eight articles contributed by internationally recognized scientists are concerned with polymers for second- and third-order nonlinear optics, quadratic parametric interactions in polymer waveguides, electroluminescent polymers for light sources, photoreflective polymers for holographic information storage, and highly efficient two-photon absorbing organics and polymers, including their applications. This review should provide individuals working in the field of photonic polymers with invaluable scientific knowledge on the state of the art while giving directions for future research to those deeply interested.

Handbook of Organic Electronics and Photonics: Electronic materials and devices

Author : Hari Singh Nalwa
Publisher :
ISBN 13 : 9781588830968
Total Pages : 1585 pages
Book Rating : 4.8/5 (39 download)

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Book Synopsis Handbook of Organic Electronics and Photonics: Electronic materials and devices by : Hari Singh Nalwa

Download or read book Handbook of Organic Electronics and Photonics: Electronic materials and devices written by Hari Singh Nalwa and published by . This book was released on 2008-01-01 with total page 1585 pages. Available in PDF, EPUB and Kindle. Book excerpt: According to Nalwa (founder and editor-in-chief of the Journal of Nanoscience and Nanotechnology), organic materials and polymers offer a range of advantages in electronic and photonic applications, including a higher degree of tailoring and versatility in the manipulation of their physical properties, ease of modification and functionalization, ease of processing and fabrication, low-cost mass production, environmental stability, and biocompatibility. He presents a three-volume handbook covering the synthesis and electrical properties of these materials, as well as a range of applications. The first volume, on electronic materials and devices, includes 13 chapters discussing such topics as synthetic approaches to band gap control in conjugated polymeric materials; synthesis, characteristics, and applications of conducting polymer nanotubes, nanowires, and nanocomposites; charge transport and morphology in conjugated polymers; nano/microfabrication techniques for organic electronics and photonics, self-assembled supramolecular structures for organic electronics and photonics; organic thin-film transistor fundamentals and applications; electropolymers for mechtronics and artificial muscles; and biologically inspired large contraction conducting polymer actuators. The second volume switches focus towards photonic materials and devices and includes 12 chapters discussing such topics as organic nonlinear optical crystals and single-crystalline thin films, organic semiconducting thin films, organic random lasers, nonlinear optical properties of organometallic and metalloorganic compounds, nonlinear optical responses and photoinduced electron transfer process in phthalocyanines and related compounds, liquid crystal diffractive optical elements, magnetoresistance and spin effects in organic light-emitting diodes, and photoinduced transfer between electron donors and fullerenes as unique electron acceptors. The final volume is concerned with devices and includes 10 chapters on such topics single-molecule transistors; nanostructured arrays as suitable materials for batteries, sensors, and electrochromic devices; organic field-effect transistors; flexible display applications in organic electronics and photonics; physics and technology and organic light emitting diodes; organic and polymeric solar cells; luminescent lanthanide complexes for advanced photonic applications; and DNA based biosensors.

Polymers for High Technology

Author : M. J. Bowden
Publisher :
ISBN 13 :
Total Pages : 648 pages
Book Rating : 4.:/5 (45 download)

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Book Synopsis Polymers for High Technology by : M. J. Bowden

Download or read book Polymers for High Technology written by M. J. Bowden and published by . This book was released on 1987 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines the ongoing electronic and photonic revolution and the fundamental, chemically related principles underlying these technologies. Provides reports on definitive advances in relatively mature technologies, and offers a better understanding of the new materials and processes needed to meet the demands of tomorrow's technology. Will serve as the stepping stone to further advances in polymer technology for chemists in both the industrial and academic sphere.

Conjugated Polymer Surfaces and Interfaces

Author : W. R. Salaneck
Publisher : Cambridge University Press
ISBN 13 : 9780521544108
Total Pages : 176 pages
Book Rating : 4.5/5 (441 download)

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Book Synopsis Conjugated Polymer Surfaces and Interfaces by : W. R. Salaneck

Download or read book Conjugated Polymer Surfaces and Interfaces written by W. R. Salaneck and published by Cambridge University Press. This book was released on 2003-10-30 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the basic physics and materials science of conjugated polymers and their interfaces.

Electronic and Photonic Applications of Polymers

Author : S. Richard Turner
Publisher :
ISBN 13 :
Total Pages : 400 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Electronic and Photonic Applications of Polymers by : S. Richard Turner

Download or read book Electronic and Photonic Applications of Polymers written by S. Richard Turner and published by . This book was released on 1988 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation. Papers of a symposium at the 192nd Meeting of the ACS Anaheim, Calif. Sept. 1988. Polymers have become a part of our everyday life. In the telecommunications industry applications have ranged from replacement of lead as a sheath in electric cable to meeting the stringent requirements for dielectrics in transoceanic communication. This seven-chapter book details the latest developments and trends in these applications. Annotation(c) 2003 Book News, Inc., Portland, OR (booknews.com).

Photonic and Optoelectronic Polymers

Author : Samson A. Jenekhe
Publisher :
ISBN 13 :
Total Pages : 588 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Photonic and Optoelectronic Polymers by : Samson A. Jenekhe

Download or read book Photonic and Optoelectronic Polymers written by Samson A. Jenekhe and published by . This book was released on 1997 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection provides a broad overview of current research and discoveries in photonic and optoelectronic polymers. It looks at their promising applications, particularly in efficient, reliable, and low-cost technologies for storing, processing, transmitting, and displaying information. Among the main topics covered are polymers for digital and holographic information storage; electroluminescent polymers for light sources; high-speed transmission, high-power amplification, and high-speed modulation of optical signals in polymer waveguides and gradient-index fibers; self-assembly and nano-structure control for efficient photoelectronic and photonic properties; and thin-film transistors from organic semiconductors.

The National Science Foundation's Materials Research Science and Engineering Centers Program

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309109612
Total Pages : 226 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis The National Science Foundation's Materials Research Science and Engineering Centers Program by : National Research Council

Download or read book The National Science Foundation's Materials Research Science and Engineering Centers Program written by National Research Council and published by National Academies Press. This book was released on 2007-12-01 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Materials Research Science and Engineering Centers (MRSEC) Impact Assessment Committee was convened by the National Research Council in response to an informal request from the National Science Foundation. Charged to examine the impact of the MRSEC program and to provide guidance for the future, the committee included experts from across materials research as well as several from outside the field. The committee developed a general methodology to examine the MRSEC centers and after extensive research and analysis, came to the following conclusions. MRSEC center awards continue to be in great demand. The intense competition within the community for them indicates a strong perceived value. Using more quantitative measures, the committee examined the performance and impact of MRSEC activities over the past decade in the areas of research, facilities, education and outreach, and industrial collaboration and technology transfer. The MRSEC program has had important impacts of the same high standard of quality as those of other multi-investigator or individual-investigator programs. Although the committee was largely unable to attribute observed impacts uniquely to the MRSEC program, MRSECs generally mobilize efforts that would not have occurred otherwise. Because of an observed decline in the effectiveness of the centers, the committee recommended a restructuring the MRSEC program to allow more efficient use and leveraging of resources. The new program should fully invest in centers of excellence as well as in stand-alone teams of researchers to allow tighter focus on key strengths of the program. In its report, the committee outlines one potential vision for how this might be accomplished in a revenue-neutral fashion.

Conjugated Polymeric Materials: Opportunities in Electronics, Optoelectronics, and Molecular Electronics

Author : J.L. Brédas
Publisher : Springer
ISBN 13 : 0792307518
Total Pages : 608 pages
Book Rating : 4.7/5 (923 download)

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Book Synopsis Conjugated Polymeric Materials: Opportunities in Electronics, Optoelectronics, and Molecular Electronics by : J.L. Brédas

Download or read book Conjugated Polymeric Materials: Opportunities in Electronics, Optoelectronics, and Molecular Electronics written by J.L. Brédas and published by Springer. This book was released on 1990-05-31 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the Proceedings of the NATO Advanced Research Workshop on Conjugated Polymers held at the University of Mons, Belgium, during the first week of September 1989. The Workshop was attended by about fifty scientists representing most of the leading research groups within NATO countries, that have contributed to the development of conjugated polymeric materials. The program was focused on applications related to electrical conductivity and nonlinear optics. The attendance was well balanced with a blend of researchers from academic, industrial, and government labs, and including synthetic chemists, physical chemists, physicists, materials scientists, and theoreticians. The Workshop provided an especially timely opportunity to discuss the important progress that has taken place in the field of Conjugated Polymers in the late eighties as well as the enormous potential that lies in front of us. Among the recent significant developments in the field, we can cite for instance: (i) The discovery of novel synthetic routes affording conjugated polymers -that are much better characterized, especially through control of the molecular weight; - that can be processed from solution or the melt; the early promise that conducting polymcrs would constitute materials combining the electrical conductivities of metals with the mechanical properties of plastics is now being realized; -that can reach remarkably high conductivities.