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Book Synthesis and Characterization of Novel Carbazole fluorene benzothiadiazole containing PPVs for Organic Polymer Light emitting Diode

Download or read book Synthesis and Characterization of Novel Carbazole fluorene benzothiadiazole containing PPVs for Organic Polymer Light emitting Diode written by 李德倫 and published by . This book was released on 2007 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Polymers for Light emitting Devices and Displays

Download or read book Polymers for Light emitting Devices and Displays written by Inamuddin and published by John Wiley & Sons. This book was released on 2020-05-01 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymers for Light-Emitting Devices and Displays provides an in-depth overview of fabrication methods and unique properties of polymeric semiconductors, and their potential applications for LEDs including organic electronics, displays, and optoelectronics. Some of the chapter subjects include: • The newest polymeric materials and processes beyond the classical structure of PLED • Conjugated polymers and their application in the light-emitting diodes (OLEDs & PLEDs) as optoelectronic devices. • The novel work carried out on electrospun nanofibers used for LEDs. • The roles of diversified architectures, layers, components, and their structural modifications in determining efficiencies and parameters of PLEDs as high-performance devices. • Polymer liquid crystal devices (PLCs), their synthesis, and applications in various liquid crystal devices (LCs) and displays. • Reviews the state-of-art of materials and technologies to manufacture hybrid white light-emitting diodes based on inorganic light sources and organic wavelength converters.

Book Synthesis and Characterization of Polymers with Alkyl Main Chain Pendent Carbazole Arylsilane modified Carbazole Or Triphenylamine Unit as Host for Polymer Light Emitting Diodes

Download or read book Synthesis and Characterization of Polymers with Alkyl Main Chain Pendent Carbazole Arylsilane modified Carbazole Or Triphenylamine Unit as Host for Polymer Light Emitting Diodes written by 莊清男 and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Characterization of Novel Conjugated Polymers and Small Molecules for Photovoltaic Applications

Download or read book Synthesis and Characterization of Novel Conjugated Polymers and Small Molecules for Photovoltaic Applications written by Robert James Thompson and published by . This book was released on 2017 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation describes the synthesis and characterization of several novel conjugated polymers and small molecules for use in research on organic photovoltaics (i.e. polymer solar cells/organic solar cells). Chapter 1 is an introductory chapter that briefly introduces semiconducting polymers and gives a brief overview of their use in polymer solar cells. Chapter 2 describes the synthesis and characterization of the conjugated polyelectrolyte, poly{(4,4-bis(3'-(N-ethyl-N,N-dimethylammonio)propyl)cyclopenta[2,1-b:3,4-b']dithiophene)-2,6-diyl-alt-(thiophene-2,5-diyl)} bromide (PCT). Chapter 3 describes the synthesis and characterization of a series of conjugated polymers containing substituted dithieno[3,2-a:2',3'-c]phenazine monomer units, and also describes the fabrication and analysis of solar cells devices made from these materials. Chapter 4 describes the synthesis and characterization of a series of conjugated polymers and small molecules based on the condensation of various aromatic o-diamines with o-diketones to produce novel N-heteroacenes. Chapter 5 gives a brief review of the work reported in this dissertation and provides suggestions for future work that can be built on those findings.

Book Synthesis and Characterization of Chromophores and Semiconducting Polymers Incorporating a 1 4 fluorenylene Scaffold

Download or read book Synthesis and Characterization of Chromophores and Semiconducting Polymers Incorporating a 1 4 fluorenylene Scaffold written by Brynna Jayne Laughlin and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Research on conjugated chromophores and polymers has been a lucrative and highly active area for over a quarter-century. These pursuits have been driven by the unique properties of conjugated systems that allow their application in myriad fields including photonics (e.g. non-linear optics), and especially optoelectronics (e.g. organic light emitting diodes (OLEDs) and photovoltaic (PV) cells). Despite the years of dedicated research, there is still much work to be done in developing better materials for these types of applications. The full range of available molecular architecture and functionalization that are yet to be explored is still an untapped well of research. To this end, the research presented here aims to explore a particular scaffold, a 1,4-fluorenylene unit, as a building block for conjugated systems. This research has elucidated novel chromophores and polymers and explored their properties so as to better understand the influence of sterics on photophysical behavior within conjugated systems, while also improving and devising new methods to be able to synthesize chromophores and polymers that can be tuned to exhibit certain photophysical or electrochemical behavior. A general overview of why conjugated materials are useful in optoelectronics, different type of conjugated materials, and some targeted applications is presented in Chapter 1. A more detailed study of polymers built on a 1,4-fluorenylene unit is presented in Chapters 2 and 3, while Chapter 4 explores the development of a new polymerization route for PPVs to reduce incidence of defects in the final polymer. Chapters 5 - 7 include a detailed investigation of 1,4-fluorenylene-containing chromophores. Chapter 5 focuses on symmetrically substituted 1,4-fluorenylenes, while Chapter 7 describes the synthesis and characterization of asymmetrically substituted 1,4-fluorenylene units. Chapter 6 demonstrates a new method for asymmetrically substituting aromatic compounds using species that contain phosphonate and phosphonium groups.

Book Synthesis and Characterization of Imidazole containing Conjugated Polymers

Download or read book Synthesis and Characterization of Imidazole containing Conjugated Polymers written by Jared D. Harris and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconducting conjugated polymers hold tremendous promise as active layers for transformative electronic devices. This materials class benefits from the structural variety provided by organic chemistry such that highly tunable band structures are attainable for as-synthesized polymers. This dissertation describes the synthesis and characterization of novel imidazole-containing conjugated polymers for the purposes of (de)protonating the as-synthesized materials gaining conjugated poly(ionomer)s. (De)protonation easily enables band structure modification through manipulation of the materials' ionization potential and electron affinity. Controlled exposure to acids and bases led to reversible (de)protonation observable via UV-visible and photoluminescence spectroscopies. (De)protonation's effects on polymeric band structures was empirically and computationally examined. Additionally, we scrutinize different approaches for gaining end-functionalized conjugated polymers from AA/BB-type polycondensations and delineate requirements to obtain well-defined chain-ends.

Book Novel Semiconducting Polymers

Download or read book Novel Semiconducting Polymers written by Emir Hubijar and published by . This book was released on 2013 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chapter 1 provides general information on conjugated polymers utilized in polymer light-emitting diodes (LEDs), polymer solar cells (PSCs) and organic field effect transistors (OFETs). It also includes brief description and schematic diagrams for each device configuration.

Book Synthesis and Characterisation of Novel Aryl Carbazole Based Conjugated Polymers for Applications in Electroluminescent Devices

Download or read book Synthesis and Characterisation of Novel Aryl Carbazole Based Conjugated Polymers for Applications in Electroluminescent Devices written by Akbar Kulasi and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis Chemical Modification and Characterization of Novel Silicon Containing Polymers

Download or read book Synthesis Chemical Modification and Characterization of Novel Silicon Containing Polymers written by Howard Shih-Jen Lee and published by . This book was released on 1990 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Design Synthesis Characterization and Study of Novel Conjugated Polymers

Download or read book Design Synthesis Characterization and Study of Novel Conjugated Polymers written by and published by . This book was released on 1997 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: After introducing the subject of conjugated polymers, the thesis has three sections each containing a literature survey, results and discussion, conclusions, and experimental methods on the following: synthesis, characterization of electroluminescent polymers containing conjugated aryl, olefinic, thiophene and acetylenic units and their studies for use in light-emitting diodes; synthesis, characterization and study of conjugated polymers containing silole unit in the main chain; and synthesis, characterization and study of silicon-bridged and butadiene-linked polythiophenes.

Book Organoboron Functionalized Conjugated Polymers

Download or read book Organoboron Functionalized Conjugated Polymers written by Haiyan Li and published by . This book was released on 2010 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thiophene- and fluorene-based polymers represent two important classes of semiconducting materials and their applications in organic light emitting devices, photovoltaics, organic field-effect transistors and chemical sensors have been extensively investigated. Electron-deficient organoboranes provide interesting characteristics including their ability to act as efficient emitters and charge transport materials in optoelectronic devices and as sensory element for nucleophiles. It is desirable to bring together these two classes of building blocks within one system to form a variety of materials with advantageous properties. We have explored two alternative design principles: (i) the embedding of boron into the conjugated polymer main chain and (ii) the direct attachment of boron as a side group to the conjugated polymer backbone. Three different projects were pursued in this general area: 1. The reactive polymer scaffold poly(fluorenylene(bromo)borane) (PFBBr) with alternating fluorene and borane moieties was prepared via B-Sn exchange reaction. Starting from PFBBr as a universal precursor, we obtained a series of polymers for which we can tune the stability, thermal characteristics, and fluorescence behavior by simple post-polymerization modification reactions. By using the same synthetic strategy, we have also prepared a main chain donor-acceptor type polymer based on a combination of fluorene and triphenylamine. As expected for an ambipolar system, this polymer exhibits a remarkable solvatochromic effect in the emission and can be oxidized and reduced electrochemically at moderate potentials. 2. In an alternative approach, a series of polythiophenes with diarylboryl functional groups attached at the lateral positions have been developed in our group by Anand Sundararaman via a post-polymerization borylation route. The electrical and structural properties of the polymer and the chemical stability can be further tuned by variation of the aryl groups on boron, for which the redox active ferrocenyl and sterically bulky Mes or Tip groups were introduced. To further investigate how the main chain chemical structure influences the optoelectronic properties of this type of polymers, we have prepared a class of bis(dimesitylboryl)bithiophene-based alternating copolymers, involving different aromatic systems such as fluorene, carbazole and triphenylamine derivatives. 3. Organoboron quinolate chelates are promising as light emitting materials because of their high thermal stability and efficient luminescence. We have prepared two new polymers with both the quinolate ligands and boron centers embedded in the main chain. The polymers were obtained by a simple one-step procedure that involves metal-free boron-induced ether cleavage reactions. All the polymers have been characterized by multinuclear NMR spectroscopy, gel permeation chromatography (GPC) and their thermal behavior has been studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Their photophysical and electrochemical properties and electronic structures have been investigated by UV-vis absorption and fluorescence spectroscopy, cyclic voltammetry and theoretical calculations for the respective model systems. The tri-coordinate organoboron compounds that were prepared are promising sensory materials and their response towards different anions has been evaluated by UV-vis absorption and fluorescence spectroscopy.

Book Synthesis and Characterization of D A Liquid Crystalline Polymers with 2 7 disubstituted Carbazole as Side Chain microform

Download or read book Synthesis and Characterization of D A Liquid Crystalline Polymers with 2 7 disubstituted Carbazole as Side Chain microform written by Li, Wanren and published by Montréal : Service des archives, Université de Montréal, Section Microfilm. This book was released on 1993 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: