Author: Kim BiniPublisher:
ISBN: 9789175978345
Category :
Languages : en
Pages :
Book Description
Design, Synthesis and Characterization of Conjugated Polymers for Photovoltaics and Electrochromics
Author: Kim BiniConjugated Polymers for Next-Generation Applications, Volume 1
Author: Vijay KumarPublisher: Woodhead Publishing
ISBN: 0128236345
Category : Technology & Engineering
Languages : en
Pages : 618
Book Description
Conjugated Polymers for Next-Generation Applications, Volume One: Synthesis, Properties and Optoelectrochemical Devices describes the synthesis and characterization of varied conjugated polymeric materials and their key applications, including active electrode materials for electrochemical capacitors and lithium-ion batteries, along with new ideas of functional materials for next-generation high-energy batteries, a discussion of common design procedures, and the pros and cons of conjugated polymers for certain applications. The book’s emphasis lies in the underlying electronic properties of conjugated polymers, their characterization and analysis, and the evaluation of their effectiveness for utilization in energy and electronics applications. This book is ideal for researchers and practitioners in the area of materials science, chemistry and chemical engineering. Provides an overview of the synthesis and functionalization of conjugated polymers and their composites Reviews important photovoltaics applications of conjugated polymeric materials, including their use in energy storage, batteries and optoelectronic devices Discusses conjugated polymers and their application in electronics for sensing, bioelectronics, memory, and more
Design, Synthesis and Characterization of Novel Low Band Gap Conjugated Polymers for Use in Bulk Heterojunction Photovoltaic Solar Cells
Author: Athanasius Justin ManjiPublisher:
ISBN:
Category :
Languages : en
Pages : 318
Book Description
This work details the synthesis of a functionalised all-donor polymer, poly(3- hexylthioacetate thiophene) (P3HTT) [42] along with four new donor-acceptor (D-A) copolymers. Two of the four copolymers are based on fluorene (F) and carbazole (C) as electron donors copolymerised with DEBT to give, PFDEBT [62] and PCDEBT [63] respectively, while the other two are based on the same electron donors, but copolymerised with DES to give PFDES [64] and PCDES [65] respectively. All the polymers exhibited good solubility in common organic solvents and good thermal stability. The spectrophotometry analysis of polymer [42] in chloroform showed that it emits in the green region with 26% photoluminescence quantum yield (PL I". The optical response of copolymers [62] and [63] in chloroform solution and thin films are similar; both have two broad absorption bands with peaks at short and long wavelengths which are within comparable range. In addition, both emit in the deep red region of the emission spectrum and have similar PL values of 55 % and 51 % respectively. The electrochemical responses of the polymers were measured using cyclic voltammetry. The results obtained for polymer [42] were different from what was expected; its band-gap was similar to that of P3HT and its energy levels were elevated. In contrast, the band-gaps of the copolymers were tuned in the range of 1.47 to 1.65 eV The results showed that the acceptor units have exhibited the same effect of band-gap lowering in the two sets of the copolymers, for instance, the LUMO energy level of copolymers [62] and [63] is - 3.32 eV and those of copolymers [64] and [65] is - 3.57 eV Conversely, different effect was observed in the values of the HOMO energy levels, for example, the values for [62] and [64] which contain the same donor (fluorene) are - 4.86 and - 5.07 eV respectively; while those of copolymers [63] and [65] composed of carbazole are - 4.97 and - 5.04 eV respectively. This may suggest that the acceptor unit reduced the band-gap by lowering the LUMO energy level but at the same time elevated the HOMO energy level probably due to the presence of EDOT.
Conjugated Polymers for Next-Generation Applications, Volume 2
Author: Vijay KumarPublisher: Woodhead Publishing
ISBN: 0128240954
Category : Technology & Engineering
Languages : en
Pages : 443
Book Description
Conjugated Polymers for Next-Generation Applications, Volume Two: Energy Storage Devices describes the synthesis and characterization of varied conjugated polymeric materials and their key applications, including active electrode materials for electrochemical capacitors and lithium-ion batteries, along with new ideas of functional materials for next-generation high-energy batteries, a discussion of common design procedures, and the pros and cons of conjugated polymers for certain applications. The book’s emphasis lies in the underlying electronic properties of conjugated polymers, their characterization and analysis, and the evaluation of their effectiveness for utilization in energy and electronics applications. This book is ideal for researchers and practitioners in the area of materials science, chemistry and chemical engineering. Provides an overview of the synthesis and functionalization of conjugated polymers and their composites Reviews important photovoltaics applications of conjugated polymeric materials, including their use in energy storage, batteries and optoelectronic devices Discusses conjugated polymers and their application in electronics for sensing, bioelectronics, memory, and more
Design, Synthesis and Characterization of Self-assembling Conjugated Polymers for Use in Organic Electronic Applications
Author: Kathy Beckner WoodyPublisher:
ISBN:
Category : Organic electronics
Languages : en
Pages :
Book Description
Conjugated polymers comprise some of the most promising materials for new technologies such as organic field effect transistors, solar light harvesting technology and sensing devices. In spite of tremendous research initiatives in materials chemistry, the potential to optimize device performance and develop new technologies is remarkable. Understanding relationships between the structure of conjugated polymers and their electronic properties is critical to improving device performance. The design and synthesis of new materials which self-organize into ordered nanostructures creates opportunities to establish relationships between electronic properties and morphology or molecular packing. This thesis details our progress in the development of synthetic routes which provide access to new classes of conjugated polymers that contain dissimilar side chains that segregate or dissimilar conjugated blocks which phase separate, and summarizes our initial attempts to characterize these materials. Poly(1,4-phenylene ethynylene)s (PPEs) have been used in a variety of organic electronic applications, most notably as fluorescent sensors. Using traditional synthetic methods, asymmetrically disubstituted PPEs have irregular placement of side chains on the conjugated backbone. Herein, we establish the first synthetic route to an asymmetrically substituted regioregular PPEs. The initial PPEs in this study have different lengths of alkoxy side chains, and both regioregular and regiorandom analogs are synthesized and characterized for comparison. The design of amphiphilic structures provides additional opportunities for side chains to influence the molecular packing and electronic properties of conjugated polymers. A new class of regioregular, amphiphilic PPEs has been prepared bearing alkoxy and semifluoroalkoxy side chains, which have a tendency to phase separate. Fully conjugated block copolymers can provide access to interesting new morphologies as a result of phase separation of the conjugated blocks. In particular, donor-acceptor block copolymers that phase separate into electron rich and electron poor domains may be advantageous in organic electronic devices such as bulk heterojunction solar cells, of which the performance relies on precise control of the interface between electron donating and accepting materials. The availability of donor-acceptor block copolymers is limited, largely due to the challenges associated with synthesizing these materials. In this thesis, two new synthetic routes to donor-acceptor block copolymers are established. These methods both utilize the catalyst transfer condensation polymerization, which proceeds by a chain growth mechanism. The first example entails the synthesis of a monofunctionalized, telechelic poly(3-alkylthiophene) which can be coupled to electron accepting polymers in a subsequent reaction. The other method describes the first example of a one-pot synthesis of a donor-acceptor diblock copolymer. The methods of synthesis are described, and characterization of the block copolymers is reported.
Design, Synthesis, and Application of Novel π-Conjugated Materials
Author: Haichang ZhangPublisher: Frontiers Media SA
ISBN: 2889664813
Category : Science
Languages : en
Pages : 126
Book Description
Design, Synthesis, and Application of Novel π-Conjugated Materials - Part II
Author: Haichang ZhangPublisher: Frontiers Media SA
ISBN: 2889716112
Category : Science
Languages : en
Pages : 70
Book Description
Conjugated Polymers for Organic Electronics
Author: Andrew GrimsdalePublisher: Cambridge University Press
ISBN: 1009566032
Category : Technology & Engineering
Languages : en
Pages : 277
Book Description
Focusing on how conjugated polymers can be designed and made for use in efficient organic electronic devices, this book covers the tools for future development of more environmentally and economically friendly devices. Including examples of interdisciplinary science, it exemplifies how chemists and physicists work together to enable the design and synthesis of high-performance material in devices, allowing polymer-based electronic devices to become viable commercial products. It provides the main classes of conjugated polymers and their applications in organic electronic devices such as transistors, light-emitting diodes, and solar cells, making this a comprehensive introduction. This complete guide includes the methods for making conjugated polymers, the properties and specific structures that make them suitable for use, and how their synthesis can be optimised to improve device performance. Written by experts in the field, this is the ideal guide for researchers and practitioners across materials science, physics, chemistry, and electrical engineering.
Design, Synthesis and Characterization of Conjugated Polymers as Fluorescent Sensors
Author: Yan ZhangPublisher:
ISBN:
Category : Fluorescent polymers
Languages : en
Pages : 258
Book Description
Author: Mohd Sani Sarjadi