Stress Effects on Charge Transport in Organic Semiconductors PDF Download
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Author: Zhenlin Rang
Publisher:
ISBN:
Category :
Languages : en
Pages : 218
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Book Description
Author: Zhenlin Rang
Publisher:
ISBN:
Category :
Languages : en
Pages : 218
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Book Description
Author: Jonathan Rivnay
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Understanding the nature of charge transport and its limitations on device performance has guided the rational design of organic semiconductors for over a decade. This understanding has led to the development of high performance small molecule and polymeric semiconductors for applications in low-cost complementary logic circuits, displays, lighting, and solar cells. Unfortunately, the large catalog of available materials and processing variables make it difficult to outline general design rules. Specifically, in polycrystalline and semicrystalline organic semiconductors, little is understood about the structural order within a grain and between grains, and even less is known about how this structure affects the material's performance. In this thesis, characterization methods are introduced to address these issues. To understand the structural source of electronic defects, a multi-step Fourier transform X-ray line shape analysis with thorough error analysis is adapted to determine crystallite size and intra-grain cumulative disorder. For the first time, the intra-crystalline disorder in transport-relevant directions is quantitatively determined for a variety of high performing organic semiconductors. These van der Waals bonded crystallites exhibit a wide range of disorder (from
Author: Elizabeth von Hauff
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Organic semiconductors are potentially a cost and energy effective alternative to conventional technologies. The understanding of charge transport in these materials and minimizing electrical losses in organic devices is essential to improve device output. In this thesis the transport properties of charge carriers in solution processed organic semiconductors were investigated via field effect measurements. Measurements of the temperature and electric field dependent charge carrier mobilities in organic field effect transistors (OFETs) is a good method for studying the transport properties in organic semiconductors. engl.
Author: Victor I. Klimov
Publisher: CRC Press
ISBN: 1420079271
Category : Technology & Engineering
Languages : en
Pages : 485
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Book Description
A review of recent advancements in colloidal nanocrystals and quantum-confined nanostructures, Nanocrystal Quantum Dots is the second edition of Semiconductor and Metal Nanocrystals: Synthesis and Electronic and Optical Properties, originally published in 2003. This new title reflects the book’s altered focus on semiconductor nanocrystals. Gathering contributions from leading researchers, this book contains new chapters on carrier multiplication (generation of multiexcitons by single photons), doping of semiconductor nanocrystals, and applications of nanocrystals in biology. Other updates include: New insights regarding the underlying mechanisms supporting colloidal nanocrystal growth A revised general overview of multiexciton phenomena, including spectral and dynamical signatures of multiexcitons in transient absorption and photoluminescence Analysis of nanocrystal-specific features of multiexciton recombination A review of the status of new field of carrier multiplication Expanded coverage of theory, covering the regime of high-charge densities New results on quantum dots of lead chalcogenides, with a focus studies of carrier multiplication and the latest results regarding Schottky junction solar cells Presents useful examples to illustrate applications of nanocrystals in biological labeling, imaging, and diagnostics The book also includes a review of recent progress made in biological applications of colloidal nanocrystals, as well as a comparative analysis of the advantages and limitations of techniques for preparing biocompatible quantum dots. The authors summarize the latest developments in the synthesis and understanding of magnetically doped semiconductor nanocrystals, and they present a detailed discussion of issues related to the synthesis, magneto-optics, and photoluminescence of doped colloidal nanocrystals as well. A valuable addition to the pantheon of literature in the field of nanoscience, this book presents pioneering research from experts whose work has led to the numerous advances of the past several years.
Author: Leslie Hendrix Jimison
Publisher: Stanford University
ISBN:
Category :
Languages : en
Pages : 142
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Book Description
Semiconducting polymers are a promising class of organic electronic materials, with the potential to have a large impact in the field of macroelectronics. In this thesis, we focus on understanding the relationship between microstructure and charge transport in semicrystalline polythiophenes. A method is presented for the measurement of complete pole figures of polymer thin films using an area detector, allowing for the first time quantitative characterization of crystalline texture and degree of crystallinity. Thin film transistors are used to measure electrical characteristics, and charge transport behavior is modeled according to the Mobility Edge (ME) model. These characterization methods are first used to investigate the effect of substrate surface treatment and thermal annealing on the microstructure of polythiophene thin films, and the effect of microstructural details on charge transport. Next, we investigate the semicrystalline microstructure in confined polythiophene films. Pole figures are used to quantify a decrease in the degree of crystallinity of films with decreasing thickness, accompanied by an improvement in crystalline texture. Next, we investigate the influence of the degree of regioregularity, molecular weight and the processing solvent on microstructure (degree of crystallinity and texture) and charge transport in high mobility P3HT thin films. Surprisingly, when processing conditions are optimized, even a polymer with moderate regioregularity can form a highly textured film with high charge carrier mobility. Finally, we use films of P3HT with engineered, anisotropic in-plane microstructure to understand the importance and mechanism of transport across grain boundaries in these semicrystalline films. Results from this study provide the first experimental evidence for the application of a percolation model for charge transport in high molecular weight semicrystalline polymer semiconductors. Understanding how characteristics of the polymer as well as details of the processing conditions can affect the film microstructure and device performance is important for future materials design and device fabrication.
Author: Maria Sabine Hammer
Publisher:
ISBN:
Category :
Languages : en
Pages : 117
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Author: Quan Li
Publisher: John Wiley & Sons
ISBN: 1118009045
Category : Technology & Engineering
Languages : en
Pages : 376
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Book Description
This book focuses on the exciting topic on self-organized organic semiconductors – from materials to device applications. It offers up-to-date and accessible coverage of self-organized semiconductors for organic chemistry, polymer science, liquid crystals, materials science, material engineering, electrical engineering, chemical engineering, optics, optic-electronics, nanotechnology and semiconductors. Chapters cover chemistry, physics, processing, and characterization. The applications include photovoltaics, light-emitting diodes (LEDs), and transistors.
Author: Hagen Klauk
Publisher: John Wiley & Sons
ISBN: 3527326472
Category : Technology & Engineering
Languages : en
Pages : 443
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Book Description
Like its predecessor this book is devoted to the materials, manufacturing and applications aspects of organic thin-film transistors. Once again authored by the most renowned experts from this fascinating and fast-moving area of research, it offers a joint perspective both broad and in-depth on the latest developments in the areas of materials chemistry, transport physics, materials characterization, manufacturing technology, and circuit integration of organic transistors. With its many figures and detailed index, this book once again also serves as a ready reference.
Author: Eric Leroy Granstrom
Publisher:
ISBN:
Category :
Languages : en
Pages : 338
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Book Description
Author: Hamid Bentarzi
Publisher: Springer Science & Business Media
ISBN: 3642163041
Category : Technology & Engineering
Languages : en
Pages : 115
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Book Description
This book focuses on the importance of mobile ions presented in oxide structures, what significantly affects the metal-oxide-semiconductor (MOS) properties. The reading starts with the definition of the MOS structure, its various aspects and different types of charges presented in their structure. A review on ionic transport mechanisms and techniques for measuring the mobile ions concentration in the oxides is given, special attention being attempted to the Charge Pumping (CP) technique associated with the Bias Thermal Stress (BTS) method. Theoretical approaches to determine the density of mobile ions as well as their distribution along the oxide thickness are also discussed. The content varies from general to very specific examples, helping the reader to learn more about transport in MOS structures.
