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Comprising two volumes, Thermoelectrics and Its Energy Harvesting reviews the vast improvements in technology and application of thermoelectric energy with a specific intention to reduce and reuse waste heat and improve novel techniques for the efficient acquisition and use of energy.Materials, Preparation, and Characterization in Thermoelectrics i
Inorganic Thermoelectric Materials reviews the important new families of advanced materials that have emerged and taken the field beyond the long-standing focus on traditional thermoelectric materials.
In the past few years, it has been shown that inorganic-organic hybrid semiconductors are promising candidates for optoelectronics and clean energy applications. These materials have the advantage of combining the excellent electrical, optical, thermal and transport properties of inorganic components with the flexibility, processability and structural diversity of the organic components. A representative of such materials is the inorganic-organic hybrids based on II-VI semiconductors. We have developed a unique class of II-VI based hybrids composed of alternating layers of double atomic slabs of Zn2S2 and organic amine molecules. The Zn2S2 based double-layer hybrids emit bright white light and their internal quantum efficiencies have reached ~33-35%, very close to the performance level of the (YAG):Ce3+ yellow phosphors presently dominating the white light emitting diodes (WLED) market. We have demonstrated that their band-gap and photoluminescence properties, quantum yield and color quality can be systematically tuned by varying the doping level and composition of inorganic and organic components. Therefore, these white-light emitting hybrid semiconductors represent a new type of single-phased phosphors made of semiconductor bulk materials with great promise for use in WLEDs which are of intense interest for general illuminations. Furthermore, we have successfully synthesized a series of new hybrid materials containing one-dimensional chains or two-dimensional layers of V-VI motifs with organic spacers between the channels or the layers. Inserting organic amines in these crystal lattices reduces the thermal conductivity without any significant effect on the electrical conductivity, and thus, it may give rise to an increase in the figure of merit, a parameter that characterizes the effectiveness of thermoelectric devices. The ability to tune the optical, electrical, and thermal properties, coupled with their high fluorescence quantum yield, solution processability, low-temperature and cost-effective one-pot synthesis, precisely controllable stoichiometry and high yield, not only make these hybrid materials promising candidates for use in WLEDs, but also highly versatile semiconductors for a range of applications such as optoelectronics, energy generation, and conversion devices.
Intended as a textbook for courses involving preparative solid-state chemistry, this book offers clear and detailed descriptions on how to prepare a selection of inorganic materials that exhibit important optical, magnetic and electrical properties, on a laboratory scale. The text covers a wide range of preparative methods and can be read as separate, independent chapters or as a unified coherent body of work. Discussions of various chemical systems reveal how the properties of a material can often be influenced by modifications to the preparative procedure, and vice versa. References to mineralogy are made throughout the book since knowledge of naturally occurring inorganic substances is helpful in devising many of the syntheses and in characterizing the product materials. A set of questions at the end of each chapter helps to connect theory with practice, and an accompanying solutions manual is available to instructors. This book is also of appeal to postgraduate students, post-doctoral researchers and those working in industry requiring knowledge of solid-state synthesis.
The first book of its kind?providing comprehensive information on oxide thermoelectrics This timely book explores the latest research results on the physics and materials science of oxide thermoelectrics at all scales. It covers the theory, design and properties of thermoelectric materials as well as fabrication technologies for devices and their applications. Written by three distinguished materials scientists, Oxide Thermoelectric Materials reviews: the fundamentals of electron and phonon transport; modeling of thermoelectric modules and their optimization; synthetic processes, structures, and properties of thermoelectric materials such as Bi2Te3- and skutterudite-based materials and Si-Ge alloys. In addition, the book provides a detailed description of the construction of thermoelectric devices and their applications. -Contains fundamentals and applications of thermoelectric materials and devices, and discusses their near-future perspectives -Introduces new, promising materials and technologies, such as nanostructured materials, perovskites, and composites -Paves the way for increased conversion efficiencies of oxides -Authored by well-known experts in the field of thermoelectrics Oxide Thermoelectric Materials is a well-organized guidebook for graduate students involved in physics, chemistry, or materials science. It is also helpful for researchers who are getting involved in thermoelectric research and development.
As concerns with the efficient use of energy resources, and the minimization of environmental damage have come to the fore, there has been a renewed interest in the role that thermoelectric devices could play in generating electricity from waste heat, enabling cooling via refrigerators with no moving parts, and many other more specialized applications. The main problem in realizing this ambition is the rather low efficiency of such devices for general applications. This book deals with the proceedings of a workshop addressed that problems by reviewing the latest experimental and theoretical work on suitable materials for device applications and by exploring various strategies that might increase their efficiency. The proceedings cover a broad range of approaches, from the experimental work of fabricating new compounds through to theoretical work in characterizing and understanding their properties. The effects of strong electron correlation, disorder, the proximity to metal-insulator transitions, the properties of layered composite materials, and the introduction of voids or cages into the structure to reduce the lattice thermal conductivity are all explored as ways of enhancing the efficiency of their use in thermoelectric devices.