Energy Level Alignment and Electron Transport Through Metal/Organic Contacts
Energy Level Alignment and Electron Transport Through Metal/Organic Contacts

Author: Enrique Abad

Publisher: Springer Science & Business Media

Published: 2012-09-15

Total Pages: 211

ISBN-13: 3642309070

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In recent years, ever more electronic devices have started to exploit the advantages of organic semiconductors. The work reported in this thesis focuses on analyzing theoretically the energy level alignment of different metal/organic interfaces, necessary to tailor devices with good performance. Traditional methods based on density functional theory (DFT), are not appropriate for analyzing them because they underestimate the organic energy gap and fail to correctly describe the van der Waals forces. Since the size of these systems prohibits the use of more accurate methods, corrections to those DFT drawbacks are desirable. In this work a combination of a standard DFT calculation with the inclusion of the charging energy (U) of the molecule, calculated from first principles, is presented. Regarding the dispersion forces, incorrect long range interaction is substituted by a van der Waals potential. With these corrections, the C60, benzene, pentacene, TTF and TCNQ/Au(111) interfaces are analyzed, both for single molecules and for a monolayer. The results validate the induced density of interface states model.

Energy Level Alignment and Electron Transport Through Metal/Organic Contacts
Energy Level Alignment and Electron Transport Through Metal/Organic Contacts

Author: Enrique Abad

Publisher: Springer Science & Business Media

Published: 2012-09-16

Total Pages: 211

ISBN-13: 3642309062

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In recent years, ever more electronic devices have started to exploit the advantages of organic semiconductors. The work reported in this thesis focuses on analyzing theoretically the energy level alignment of different metal/organic interfaces, necessary to tailor devices with good performance. Traditional methods based on density functional theory (DFT), are not appropriate for analyzing them because they underestimate the organic energy gap and fail to correctly describe the van der Waals forces. Since the size of these systems prohibits the use of more accurate methods, corrections to those DFT drawbacks are desirable. In this work a combination of a standard DFT calculation with the inclusion of the charging energy (U) of the molecule, calculated from first principles, is presented. Regarding the dispersion forces, incorrect long range interaction is substituted by a van der Waals potential. With these corrections, the C60, benzene, pentacene, TTF and TCNQ/Au(111) interfaces are analyzed, both for single molecules and for a monolayer. The results validate the induced density of interface states model.

Chemistry of Functional Materials Surfaces and Interfaces
Chemistry of Functional Materials Surfaces and Interfaces

Author: Andrei Honciuc

Publisher: Elsevier

Published: 2021-02-19

Total Pages: 282

ISBN-13: 0128231939

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Chemistry of Functional Materials Surfaces and Interfaces: Fundamentals and Applications gives a descriptive account of interfacial phenomena step-by-step, from simple to complex, to provide readers with a strong foundation of knowledge in interfacial materials chemistry. Many case studies are provided to give real-world examples of problems and their solutions, allowing readers to make the connection between fundamental understanding and applications. Emerging applications in nanomaterials and nanotechnology are also discussed. Throughout the book, the author explains the common interface and surface equations, models, methods, and applications in the creation of functional materials. The goal of Chemistry of Functional Materials Surfaces and Interfaces is to provide readers with the basic understanding of the common tools of surface and interface chemistry for application in materials science and nanotechnology. This book is suitable for researchers and practitioners in the disciplines of materials science and engineering and surface and interface chemistry. - Includes numerous real-world examples and case studies throughout - Addresses emerging applications of interfacial materials chemistry in nanomaterials and nanotechnology - Provides the foundational concepts of surface and interfacial science with models, equation, and methods

Multifunctional Lightweight Structures
Multifunctional Lightweight Structures

Author: Lothar Kroll

Publisher: Springer Nature

Published: 2023-03-28

Total Pages: 673

ISBN-13: 3662622173

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This book presents key research findings on the combination of different technologies that promise to be particularly sustainable and broadly impactful in their application. The findings were compiled during the course of the first funding period for the MERGE Cluster of Excellence. New methods, potential solutions, and exemplary pilot applications take center stage as the text explores the next generation of functional integration via lightweight structures. The underlying manufacturing processes are based on textile, polymer, and metal processing techniques, all of which are suitable for large batch production, flexibility, and reproducibility.

Electronic Processes in Organic Electronics
Electronic Processes in Organic Electronics

Author: Hisao Ishii

Publisher: Springer

Published: 2015-01-07

Total Pages: 427

ISBN-13: 4431552065

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The book covers a variety of studies of organic semiconductors, from fundamental electronic states to device applications, including theoretical studies. Furthermore, innovative experimental techniques, e.g., ultrahigh sensitivity photoelectron spectroscopy, photoelectron yield spectroscopy, spin-resolved scanning tunneling microscopy (STM), and a material processing method with optical-vortex and polarization-vortex lasers, are introduced. As this book is intended to serve as a textbook for a graduate level course or as reference material for researchers in organic electronics and nanoscience from electronic states, fundamental science that is necessary to understand the research is described. It does not duplicate the books already written on organic electronics, but focuses mainly on electronic properties that arise from the nature of organic semiconductors (molecular solids). The new experimental methods introduced in this book are applicable to various materials (e.g., metals, inorganic and organic materials). Thus the book is also useful for experts working in physics, chemistry, and related engineering and industrial fields.

The Physics of Solar Energy Conversion
The Physics of Solar Energy Conversion

Author: Juan Bisquert

Publisher: CRC Press

Published: 2020-06-09

Total Pages: 491

ISBN-13: 0429000154

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Research on advanced energy conversion devices such as solar cells has intensified in the last two decades. A broad landscape of candidate materials and devices were discovered and systematically studied for effective solar energy conversion and utilization. New concepts have emerged forming a rather powerful picture embracing the mechanisms and limitation to efficiencies of different types of devices. The Physics of Solar Energy Conversion introduces the main physico-chemical principles that govern the operation of energy devices for energy conversion and storage, with a detailed view of the principles of solar energy conversion using advanced materials. Key Features include: Highlights recent rapid advances with the discovery of perovskite solar cells and their development. Analyzes the properties of organic solar cells, lithium ion batteries, light emitting diodes and the semiconductor materials for hydrogen production by water splitting. Embraces concepts from nanostructured and highly disordered materials to lead halide perovskite solar cells Takes a broad perspective and comprehensively addresses the fundamentals so that the reader can apply these and assess future developments and technologies in the field. Introduces basic techniques and methods for understanding the materials and interfaces that compose operative energy devices such as solar cells and solar fuel converters.

Organic and Printed Electronics
Organic and Printed Electronics

Author: Giovanni Nisato

Publisher: CRC Press

Published: 2024-05-24

Total Pages: 777

ISBN-13: 104003554X

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The field of organic and printed electronics (OPE) is well established in terms of academic, scientific, and technological research. The mass applications, ranging from displays to printed sensors to photovoltaics, are growing and becoming all the more relevant today. This book provides a comprehensive introduction to organic flexible and printed electronics, their fundamental aspects, core technologies, and applications and is authored by international expert practitioners in the field. The book is a key reference resource specially designed to address students in their final undergraduate or beginning graduate studies as well as engineers interested in approaching this field from an application perspective. In this second edition of the book, almost all chapters have been revised and updated. Among others, the second edition includes new chapters on smart textiles and on photovoltaics. The chapter on characterization techniques has been expanded and includes new references to standards. The contents on circular economy, innovation management, and roadmapping chapters have been largely augmented and updated. Finally, the chapter on hands-on experiments includes new set-ups on dye solar cells and supercapacitors.

Wspc Reference On Organic Electronics, The: Organic Semiconductors (In 2 Volumes)
Wspc Reference On Organic Electronics, The: Organic Semiconductors (In 2 Volumes)

Author: Seth R Marder

Publisher: World Scientific

Published: 2016-06-24

Total Pages: 896

ISBN-13: 9814699241

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This 2-volume set provides the reader with a basic understanding of the foundational concepts pertaining to the design, synthesis, and applications of conjugated organic materials used as organic semiconductors, in areas including organic photovoltaic devices, light-emitting diodes, field-effect transistors, spintronics, actuation, bioelectronics, thermoelectrics, and nonlinear optics.While there are many monographs in these various areas, the emphasis here is both on the fundamental chemistry and physics concepts underlying the field of organic semiconductors and on how these concepts drive a broad range of applications. This makes the volumes ideal introductory textbooks in the subject. They will thus offer great value to both junior and senior scientists working in areas ranging from organic chemistry to condensed matter physics and materials science and engineering.Number of Illustrations and Tables: 168 b/w illus., 242 colour illus., 13 tables.

Handbook of Nanomaterials for Industrial Applications
Handbook of Nanomaterials for Industrial Applications

Author: Chaudhery Mustansar Hussain

Publisher: Elsevier

Published: 2018-07-19

Total Pages: 1143

ISBN-13: 012813352X

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Handbook of Nanomaterials for Industrial Applications explores the use of novel nanomaterials in the industrial arena. The book covers nanomaterials and the techniques that can play vital roles in many industrial procedures, such as increasing sensitivity, magnifying precision and improving production limits. In addition, the book stresses that these approaches tend to provide green, sustainable solutions for industrial developments. Finally, the legal, economical and toxicity aspects of nanomaterials are covered in detail, making this is a comprehensive, important resource for anyone wanting to learn more about how nanomaterials are changing the way we create products in modern industry. - Demonstrates how cutting-edge developments in nanomaterials translate into real-world innovations in a range of industry sectors - Explores how using nanomaterials can help engineers to create innovative consumer products - Discusses the legal, economical and toxicity issues arising from the industrial applications of nanomaterials

Organic Solar Cells
Organic Solar Cells

Author: Wolfgang Tress

Publisher: Springer

Published: 2014-11-22

Total Pages: 474

ISBN-13: 3319100971

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This book covers in a textbook-like fashion the basics or organic solar cells, addressing the limits of photovoltaic energy conversion and giving a well-illustrated introduction to molecular electronics with focus on the working principle and characterization of organic solar cells. Further chapters based on the author’s dissertation focus on the electrical processes in organic solar cells by presenting a detailed drift-diffusion approach to describe exciton separation and charge-carrier transport and extraction. The results, although elaborated on small-molecule solar cells and with focus on the zinc phthalocyanine: C60 material system, are of general nature. They propose and demonstrate experimental approaches for getting a deeper understanding of the dominating processes in amorphous thin-film based solar cells in general. The main focus is on the interpretation of the current-voltage characteristics (J-V curve). This very standard measurement technique for a solar cell reflects the electrical processes in the device. Comparing experimental to simulation data, the author discusses the reasons for S-Shaped J-V curves, the role of charge carrier mobilities and energy barriers at interfaces, the dominating recombination mechanisms, the charge carrier generation profile, and other efficiency-limiting processes in organic solar cells. The book concludes with an illustrative guideline on how to identify reasons for changes in the J-V curve. This book is a suitable introduction for students in engineering, physics, material science, and chemistry starting in the field of organic or hybrid thin-film photovoltaics. It is just as valuable for professionals and experimentalists who analyze solar cell devices.