Organic Thermoelectrics
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Organic Thermoelectrics
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Author : Daoben Zhu
language : en
Publisher: John Wiley & Sons
Release Date : 2023-01-30
Organic Thermoelectrics written by Daoben Zhu and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-01-30 with Technology & Engineering categories.
Enables readers to understand the development and applications of organic thermoelectric conversion, including fundamentals and experimental breakthroughs Organic Thermoelectrics: From Materials to Devices introduces organic thermoelectric materials to devices in a systematic manner, covering the development of organic thermoelectric materials, followed by a discussion on the fundamental mechanism of thermoelectric conversion, design strategy, and advances in different materials, device fabrication, and characterizations of thermoelectric parameters. In Organic Thermoelectrics, readers can expect to find detailed information on: Fundamentals of thermoelectric (TE) conversion, development of organic thermoelectric (OTE) fields and mechanisms, and basic physical processes in carrier transport and thermal transport for TE conversion Recent development and key strategies to develop p-type, n-type, and composite/hybrid OTE materials Basic mechanisms, fundamental requirements, and recent advances of doping for OTE applications, plus geometries and construction methods of OTE devices Theoretical and experimental advances in single molecular TE devices, together with the recent development in related detection methods Powered by worldwide innovative research results in the past ten years and strongly supported by many collaborators, Organic Thermoelectrics is a comprehensive reference on the subject and is invaluable for scientists and students in chemistry, materials, and engineering.
Organic Thermoelectric Materials
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Author : Zhiqun Lin
language : en
Publisher: Royal Society of Chemistry
Release Date : 2019-10-18
Organic Thermoelectric Materials written by Zhiqun Lin and has been published by Royal Society of Chemistry this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-10-18 with Science categories.
This book summarises the significant progress made in organic thermoelectric materials, focusing on effective routes to minimize thermal conductivity and maximize power factor.
Doping And Density Of States Engineering For Organic Thermoelectrics
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Author : Guangzheng Zuo
language : en
Publisher: Linköping University Electronic Press
Release Date : 2018-05-14
Doping And Density Of States Engineering For Organic Thermoelectrics written by Guangzheng Zuo and has been published by Linköping University Electronic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-14 with categories.
Thermoelectric materials can turn temperature differences directly into electricity. To use this to harvest e.g. waste heat with an efficiency that approaches the Carnot efficiency requires a figure of merit ZT larger than 1. Compared with their inorganic counterparts, organic thermoelectrics (OTE) have numerous advantages, such as low cost, large-area compatibility, flexibility, material abundance and an inherently low thermal conductivity. Therefore, organic thermoelectrics are considered by many to be a promising candidate material system to be used in lower cost and higher efficiency thermoelectric energy conversion, despite record ZT values for OTE currently lying around 0.25. A complete organic thermoelectric generator (TEG) normally needs both p-type and n-type materials to form its electric circuit. Molecular doping is an effective way to achieve p- and ntype materials using different dopants, and it is necessary to fundamentally understand the doping mechanism. We developed a simple yet quantitative analytical model and compare it with numerical kinetic Monte Carlo simulations to reveal the nature of the doping effect. The results show the formation of a deep tail in the Gaussian density of states (DOS) resulting from the Coulomb potentials of ionized dopants. It is this deep trap tail that negatively influences the charge carrier mobility with increasing doping concentration. The trends in mobilities and conductivities observed from experiments are in good agreement with the modeling results, for a large range of materials and doping concentrations. Having a high power factor PF is necessary for efficient TEG. We demonstrate that the doping method can heavily impact the thermoelectric properties of OTE. In comparison to conventional bulk doping, sequential doping can achieve higher conductivity by preserving the morphology, such that the power factor can improve over 100 times. To achieve TEG with high output power, not only a high PF is needed, but also having a significant active layer thickness is very important. We demonstrate a simple way to fabricate multi-layer devices by sequential doping without significantly sacrificing PF. In addition to the application discussed above, harvesting large amounts of heat at maximum efficiency, organic thermoelectrics may also find use in low-power applications like autonomous sensors where voltage is more important than power. A large output voltage requires a high Seebeck coefficient. We demonstrate that density of states (DOS) engineering is an effective tool to increase the Seebeck coefficient by tailoring the positions of the Fermi energy and the transport energy in n- and p-type doped blends of conjugated polymers and small molecules. In general, morphology heavily impacts the performance of organic electronic devices based on mixtures of two (or more) materials, and organic thermoelectrics are no exception. We experimentally find that the charge and energy transport is distinctly different in well-mixed and phase separated morphologies, which we interpreted in terms of a variable range hopping model. The experimentally observed trends in conductivity and Seebeck coefficient are reproduced by kinetic Monte Carlo simulations in which the morphology is accounted for.
Doping And Density Of States Engineering For Organic Thermoelectrics
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Author : Guangzheng Zuo
language : en
Publisher:
Release Date : 2018
Doping And Density Of States Engineering For Organic Thermoelectrics written by Guangzheng Zuo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Thermoelectric materials can turn temperature differences directly into electricity. To use this to harvest e.g. waste heat with an efficiency that approaches the Carnot efficiency requires a figure of merit ZT larger than 1. Compared with their inorganic counterparts, organic thermoelectrics (OTE) have numerous advantages, such as low cost, large-area compatibility, flexibility, material abundance and an inherently low thermal conductivity. Therefore, organic thermoelectrics are considered by many to be a promising candidate material system to be used in lower cost and higher efficiency thermoelectric energy conversion, despite record ZT values for OTE currently lying around 0.25. A complete organic thermoelectric generator (TEG) normally needs both p-type and n-type materials to form its electric circuit. Molecular doping is an effective way to achieve p- and ntype materials using different dopants, and it is necessary to fundamentally understand the doping mechanism. We developed a simple yet quantitative analytical model and compare it with numerical kinetic Monte Carlo simulations to reveal the nature of the doping effect. The results show the formation of a deep tail in the Gaussian density of states (DOS) resulting from the Coulomb potentials of ionized dopants. It is this deep trap tail that negatively influences the charge carrier mobility with increasing doping concentration. The trends in mobilities and conductivities observed from experiments are in good agreement with the modeling results, for a large range of materials and doping concentrations. Having a high power factor PF is necessary for efficient TEG. We demonstrate that the doping method can heavily impact the thermoelectric properties of OTE. In comparison to conventional bulk doping, sequential doping can achieve higher conductivity by preserving the morphology, such that the power factor can improve over 100 times. To achieve TEG with high output power, not only a high PF is needed, but also having a significant active layer thickness is very important. We demonstrate a simple way to fabricate multi-layer devices by sequential doping without significantly sacrificing PF. In addition to the application discussed above, harvesting large amounts of heat at maximum efficiency, organic thermoelectrics may also find use in low-power applications like autonomous sensors where voltage is more important than power. A large output voltage requires a high Seebeck coefficient. We demonstrate that density of states (DOS) engineering is an effective tool to increase the Seebeck coefficient by tailoring the positions of the Fermi energy and the transport energy in n- and p-type doped blends of conjugated polymers and small molecules. In general, morphology heavily impacts the performance of organic electronic devices based on mixtures of two (or more) materials, and organic thermoelectrics are no exception. We experimentally find that the charge and energy transport is distinctly different in well-mixed and phase separated morphologies, which we interpreted in terms of a variable range hopping model. The experimentally observed trends in conductivity and Seebeck coefficient are reproduced by kinetic Monte Carlo simulations in which the morphology is accounted for.
Innovative Thermoelectric Materials
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Author : Howard E Katz
language : en
Publisher: World Scientific
Release Date : 2016-01-22
Innovative Thermoelectric Materials written by Howard E Katz and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-01-22 with Science categories.
Power generation from environmentally friendly sources has led to surging interest in thermoelectrics. There has been a move toward alternative thermoelectric materials with enhanced performance through materials and structures that utilize common and safer elements and alternative mechanistic approaches while increasing processing latitude and decreasing cost. This wide-ranging volume examines this progress and future prospects with the new technologies, ease of processing and cost as major considerations, and will benefit active researchers, students and others interested in cutting-edge work in thermoelectric materials. Innovative Thermoelectric Materials incorporates the contributions of a group of recognized experts in thermoelectric materials, many of whom were the first to introduce various materials systems into thermoelectric systems. The perspectives brought to this evolving subject will provide important insights on which those developing the field can build, and will inspire new research directions for the future. Contents:Innovative Thermoelectric Materials (Theodore O Poehler and Howard E Katz [Johns Hopkins University, USA])Solution Processable Molecular and Polymer Semiconductors for Thermoelectrics (Ruth Schlitz, Anne Glaudell and Michael Chabinyc [UC Santa Barbara, USA])Nanostructured Thermoelectric Materials (Sangyeop Lee and Gang Chen [MIT, USA])New Design Rules for Polymer-Based Thermoelectric Nanocomposites (Jeffrey J Urban and Nelson E Coates [LBNL, USA])Role of Dopants in Defining Carrier Densities, Energetics, and Transport in Semiconducting Polymers (Gun-Ho Kim and Kevin P Pipe [University of Michigan, USA])Thermoelectric Polymer–Inorganic Composites (Robert M Ireland and Howard E Katz [Johns Hopkins University, USA])Modeling Thermoelectric Materials (Greg Walker [Vanderbilt University, USA])Phase-Transition-Enhanced Thermoelectric Performance in Copper Selenide (David R Brown and G Jeffrey Snyder [Caltech, USA]) Readership: Researchers and post-graduate students in the field of thermoelectrics. Key Features:Presents a highly authoritative picture of the field with contemporary information by prominent contributors to the fieldFirst book that highlights the potential of polymers in thermoelectricsSubstantial theoretical analysis included to justify the experimental approaches reported and proposed at a level of detail that is both comprehensive and accessibleKeywords:Polymers;Nanostructures;Composites;Thermoelectric Materials;Energy Conversion
Low Grade Thermal Energy Harvesting
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Author : Shiren Wang
language : en
Publisher: Woodhead Publishing
Release Date : 2022-03-22
Low Grade Thermal Energy Harvesting written by Shiren Wang and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-03-22 with Technology & Engineering categories.
Low-Grade Thermal Energy Harvesting: Advances in Thermoelectrics, Materials, and Emerging Applications provides readers with fundamental and key concepts surrounding low-grade thermal energy conversion while also reviewing the latest research directions. The book covers the most promising and emerging technologies for low-grade heat recovery, harvesting and conversion, including wearable thermoelectrics and organic thermoelectrics. Each chapter includes key materials, principles, design and fabrication strategies for low-grade heat recovery. Special attention on emerging materials such as organic composites, 2D materials and nanomaterials are also included. The book emphasizes materials and device structures that enable the powering of wearable electronics and consumer electronics. The book is suitable for materials scientists and engineers in academia and R&D in manufacturing, industry, energy and electronics. Introduces key concepts and fundamental principles of low-grade thermal energy harvesting, storage and conversion Provides an overview on key materials, design principles and fabrication strategies for devices for low energy harvesting applications Focuses on materials and device designs that enable wearable thermoelectrics and flexible electronics applications
Thermoelectric Materials And Devices
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Author : Lidong Chen
language : en
Publisher: Elsevier
Release Date : 2020-09-25
Thermoelectric Materials And Devices written by Lidong Chen and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-09-25 with Technology & Engineering categories.
Thermoelectric Materials and Devices summarizes the latest research achievements over the past 20 years of thermoelectric material and devices, most notably including new theory and strategies of thermoelectric materials design and the new technology of device integration. The book's author has provided a bridge between the knowledge of basic physical/chemical principles and the fabrication technology of thermoelectric materials and devices, providing readers with research and development strategies for high performance thermoelectric materials and devices. It will be a vital resource for graduate students, researchers and technologists working in the field of energy conversion and the development of thermoelectric devices. Discusses the new theory and methods of thermoelectric materials design Combines scientific principles, along with synthesis and fabrication technologies in thermoelectric materials Presents the design optimization and interface technology for thermoelectric devices Introduces thermoelectric polymers and organic-inorganic thermoelectric composites
Advanced Thermoelectric Materials For Energy Harvesting Applications
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Author : Saim Memon
language : en
Publisher: BoD – Books on Demand
Release Date : 2019-10-30
Advanced Thermoelectric Materials For Energy Harvesting Applications written by Saim Memon and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-10-30 with Science categories.
Advanced Thermoelectric Materials for Energy Harvesting Applications is a research-intensive textbook covering the fundamentals of thermoelectricity and the process of converting heat energy into electrical energy. It covers the design, implementation, and performance of existing and advanced thermoelectric materials. Chapters examine such topics as organic/inorganic thermoelectric materials, performance and behaviors of thermoelectric devices, and energy harvesting applications of thermoelectric devices.
Novel Thermoelectric Materials And Device Design Concepts
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Author : Sergey Skipidarov
language : en
Publisher: Springer Nature
Release Date : 2019-12-17
Novel Thermoelectric Materials And Device Design Concepts written by Sergey Skipidarov and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-12-17 with Technology & Engineering categories.
This book presents and facilitates the interchange of new research and development results concerned with hot topics in thermoelectric generators (TEGs) research, development and production. Topics include prospective thermoelectric materials for manufacturing TEGs operating in low-, mid-, and high temperature ranges, thermal and mechanical degradation issues in prospective thermoelectric materials and TEG modules, theoretical study of novel inorganic and organic thermoelectric materials, novel methods and apparatus for measuring performance of thermoelectric materials and TEGs, and thermoelectric power generators simulation, modeling, design and practice.This book helps researchers tackle the challenges that still remain in creating cheap and effective TEGs and presents the latest trends and technologies in development and production of advanced thermoelectric generation devices. Provides a concentration of new research and development in the field of Thermoelectric energy generation; Facilitates the interchange of new ideas and results to react effectively to the challenges of Thermoelectric generators; Explains both the advancements and challenges in TEGs.
Thermoelectrics For Power Generation
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Author : Mikhail Nikitin
language : en
Publisher: BoD – Books on Demand
Release Date : 2016-12-21
Thermoelectrics For Power Generation written by Mikhail Nikitin and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-12-21 with Technology & Engineering categories.
Thermoelectrics for Power Generation - A Look at Trends in the Technology is the first part of the InTech collection of international community works in the field of thermoelectric power generation. The authors from many counties have presented in this book their achievements and vision for the future development in different aspects of thermoelectric power generation. Remarkably, this hot topic unites together efforts of researchers and engineers from all continents of our planet. The reader will find in the book a lot of new interesting information concerning prospective materials for thermoelectric generators, both inorganic and organic; results of theoretical studies of materials characteristics; novel methods and apparatus for measuring performance of thermoelectric materials and devices; and thermoelectric power generator simulation, modeling, design, and practice.