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Author: Qian Miao
Publisher:
ISBN:
Category : Molecular electronics
Languages : en
Pages : 418
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Book Description
Author: Qian Miao
Publisher:
ISBN:
Category : Molecular electronics
Languages : en
Pages : 418
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Book Description
Author: Panikki Chandima Bulumulla
Publisher:
ISBN:
Category : Electrophiles
Languages : en
Pages :
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Book Description
Organic semiconductors are potential candidates for replacing high-cost silicon electronics for low-end applications where high mobilities are not required. Owing to unique advantages such as solution processability, flexibility, lightweight, low cost with countless structural modifications, organic semiconductors can be realized for many applications using high throughput roll-to-roll fabrication techniques. Hence, a remarkable amount of scientific efforts have been dedicated to improving electronic and physical properties of these materials. Throughout the past two decades, many improvements in the field have been achieved by designing novel building blocks. Since efficiencies and mobilities in organic solar cells and transistors have stagnated, it is highly desirable to seek and develop non-conventional building blocks for organic electronics. In this dissertation, the fundamentals and recent developments of non-conventional materials are covered in Chapter 1. Operation principles, charge transport of organic field effect transistors and organic photovoltaics are introduced. Compared to conventional thiophene-based -electron donor materials, promising non-conventional pyrrole based donor materials employed in organic electronics are discussed and summarized. Similarly, non-conventional electron acceptors could be used to fabricate organic solar cells. By using inorganic semiconducting quantum dots (QDs), organic-inorganic hybrid solar cells could be fabricated. Different systems with polymer: QD solar cells are also discussed and summarized in chapter 1. Chapter 2 describes the effect on organic field effect transistor (OFET) properties of two novel small molecules containing terminal N-dodecylthieno[3,2-b]pyrrole (TP) donors and N-dodecylfuro[3,2-b]pyrrole (FP) donors with a central thiophene flanked 5,6-difluorobenzo[c][1,2,5]thiadiazole (FBT) acceptor. The influence on frontier molecular orbital energy levels, UV-vis absorption, electrochemical properties, OFET parameters and morphological effects were investigated. In chapter 3, the effect of flanking group on banana shape small molecules is discussed by using terminal N-dodecylthieno[3,2-b]pyrrole (TP) donors, and thiophene or furan flanked benzo[c][1,2,5]thiadiazole (BT) central units. Upon changing similar flanking groups, the curvature of the small molecules was changed. Thiophene flanked small molecule showed high hole mobility of 0.08 cm2 /V s while furan flanked small molecule performs poorly due to both heteroatom effect and the degree of curvature. Chapter 4 describes the extension of thieno[3,2-b]pyrrole based small molecules to polymers. A Novel conjugated polymer is synthesized by copolymerizing N-methylthieno[3,2-b]pyrrole and 2,5-bis(2-octyldodecyl)-3,6-di(thiophen-2-yl)-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione (DPP) via Stille coupling polymerization. With an optimized molecular weight, the polymer exhibited high hole mobility of 0.12 cm2 /V s in OFET devices. The high hole mobility reflects the potential of the thieno[3,2-b]pyrrole building block. Inorganic QDs also can be employed as electron acceptors compared to conventional fullerene derivatives in bulk heterojunction (BHJ) solar cells. However, they do not outperform conventional fullerene counterparts. Therefore in chapter 5, a facile method is described to generate thiol functionalized block copolymers to improve the interaction between photoactive polymers and QDs. By incorporating only 17 mol% of the thiol containing block a two-fold increase in power conversion efficiency was observed. The improved interaction was supported by atomic force microscopy and photoluminescence quenching studies.
Author: Stergios Logothetidis
Publisher: Elsevier
ISBN: 1782420436
Category : Technology & Engineering
Languages : en
Pages : 483
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Book Description
Organic flexible electronics represent a highly promising technology that will provide increased functionality and the potential to meet future challenges of scalability, flexibility, low power consumption, light weight, and reduced cost. They will find new applications because they can be used with curved surfaces and incorporated in to a number of products that could not support traditional electronics. The book covers device physics, processing and manufacturing technologies, circuits and packaging, metrology and diagnostic tools, architectures, and systems engineering. Part one covers the production, properties and characterisation of flexible organic materials and part two looks at applications for flexible organic devices. - Reviews the properties and production of various flexible organic materials. - Describes the integration technologies of flexible organic electronics and their manufacturing methods. - Looks at the application of flexible organic materials in smart integrated systems and circuits, chemical sensors, microfluidic devices, organic non-volatile memory devices, and printed batteries and other power storage devices.
Author: Zhuangqing Yan
Publisher:
ISBN:
Category :
Languages : en
Pages : 101
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Book Description
Organic semiconductors are envisioned to have widespread applications in flexible displays, radio-frequency identification (RFID) tags, bio- and chem-sensors, as well as organic solar cells. Polymer semiconductors are particularly suitable for the low-cost manufacture of organic electronics using printing techniques due to their excellent solution processability and mechanical properties. This work focuses on the development of two novel building blocks, IBDF and DTA, which can be used for the construction of high performance organic thin film transistors (OTFTs) and organic photovoltaics (OPVs). Two copolymers, P6-IBDF-T and P5-IBDF-T, and a homopolymer P6-IBDF were prepared using the IBDF building block. Copolymer P6-IBDF-T has been prepared via the Stille-coupling polymerization. This polymer exhibits a small band gap of 1.36 eV with HOMO/LUMO energy level of -5.69 eV/-4.43 eV. P6-IBDF-T showed stable electron transport performance in encapsulated thin film transistors and ambipolar transport performance in non-encapsulated TFTs. Balanced hole/electron mobilities of up to 8.2 ×10-3/1.0 ×10-2 cm2V-1s-1 was achieved in bottom-contact, bottom-gate organic thin film transistors. In addition, the broad absorption of the polymer over the UV-Vis range suggested that this polymer is suitable for applications in solar cells. The effect of conjugation on mobility and UV-vis spectra of the polymer was studied by comparing P5-IBDF-T with P6-IBDF-T. The ideal of indirect electron transition was proposed to explain the difference between UV-Vis light absorption spectra for these two polymers. DTA building block was used to construct four D-A copolymers, namely PDTA-T, PDTA-BT, PDAT-BTV, and PDTA-TT. These polymers were characterized by UV-Vis, CV, DSC, TGA, AFM and XRD. Device performance was also investigated on OTFTs. The device performance of DTA based polymer increased as the area of electron donor increase from T in PDTA-T to BTV in PDTA-BTV. PDTA-BTV exhibits hole mobility of 1.3×10-3 cm2 V-1 s-1 with Ion/Ioff value of ~103-4 in bottom-contact, bottom-gate organic thin film transistors. All DTA based copolymers exhibited small optical bandgaps (1.18 - 1.27 eV) and required none or moderate thermal treatment during fabrication process. These make them promising candidates for cost-effective OPV applications.
Author: Paolo Samorì
Publisher: John Wiley & Sons
ISBN: 3527689915
Category : Technology & Engineering
Languages : en
Pages : 1332
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Book Description
A comprehensive overview of functional nanosystems based on organic and polymeric materials and their impact on current and future research and technology in the highly interdisciplinary field of materials science. As such, this handbook covers synthesis and fabrication methods, as well as properties and characterization of supramolecular architectures. Much of the contents are devoted to existing and emerging applications, such as organic solar cells, transistors, diodes, nanowires and molecular switches. The result is an indispensable resource for materials scientists, organic chemists, molecular physicists and electrochemists looking for a reliable reference on this hot topic.
Author: Katharina Al-Shamery
Publisher: Springer Science & Business Media
ISBN: 3540719237
Category : Technology & Engineering
Languages : en
Pages : 369
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Book Description
This jaw-dropping window on the future is the first comprehensive overview of the fabrication, fundamental properties, and applications of a new class of nanoscaled organic materials. These materials offer incredible scope to scientists wanting to exploit their optical and electronic properties and offer the potential to create a new generation of tiny devices with powerful applications. Altogether, the book offers a unique integration of organic materials science basics, nanostructured organic materials fabrication, and device applications.
Author: Xing Lu
Publisher: CRC Press
ISBN: 1466593954
Category : Science
Languages : en
Pages : 276
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Book Description
Knowledge on endohedral metallofullerenes (EMFs) has increased dramatically during the last decade. Numerous research findings have been reported, making it an opportune time to provide a systematic update on EMFs. Endohedral Metallofullerenes: Basics and Applications presents the most comprehensive review on all aspects of EMFs including their gen
Author: Assunta Marrocchi
Publisher: Woodhead Publishing
ISBN: 0128236019
Category : Technology & Engineering
Languages : en
Pages : 594
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Book Description
Sustainable Strategies in Organic Electronics reviews green materials and devices, sustainable processes in electronics, and the reuse, recycling and degradation of devices. Topics addressed include large-scale synthesis and fabrication of safe device materials processes that neither use toxic reagents, solvents or produce toxic by-products. Emerging opportunities such as new synthetic approaches for enabling the commercialization of pi-conjugated polymer-based devices are explored, along with new efforts towards incorporating materials from renewable resources for a low carbon footprint. Finally, the book discusses the latest advances towards device biodegradability and recycling. It is suitable for materials scientists and engineers, chemists, physicists in academia and industry. - Discusses emerging opportunities for green materials, synthesis and fabrication of organic electronics - Reviews the challenges of integration of sustainable strategies in large-scale manufacturing of organic electronics - Provides an overview of green materials and solvents that can be used as alternatives to toxic materials for organic electronics applications
Author: Fabio Cicoira
Publisher: John Wiley & Sons
ISBN: 3527650989
Category : Technology & Engineering
Languages : en
Pages : 441
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Book Description
An overview of the tremendous potential of organic electronics, concentrating on those emerging topics and technologies that will form the focus of research over the next five to ten years. The young and energetic team of editors with an excellent research track record has brought together internationally renowned authors to review up-and-coming topics, some for the first time, such as organic spintronics, iontronics, light emitting transistors, organic sensors and advanced structural analysis. As a result, this book serves the needs of experienced researchers in organic electronics, graduate students and post-doctoral researchers, as well as scientists active in closely related fields, including organic chemical synthesis, thin film growth and biomaterials. Cover Figure: With kind permission of Matitaccia.
Author: Chin Wee Shong
Publisher: Pan Stanford Publishing
ISBN: 9814241032
Category : Science
Languages : en
Pages : 226
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Book Description
Nanotechnology is one of the most important growth areas of this century. This book aims to introduce the various basic principles and knowledge needed for students to understand science at the nanoscale.--[book cover].
