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Tailored Metal-Organic Interactions for Energy Harvesting.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Tailored Metal-Organic Interactions for Energy Harvesting./
作者:	Hinckley, Allison Claire.
面頁冊數:	1 online resource (149 pages)
附註:	Source: Dissertations Abstracts International, Volume: 82-10, Section: B.
Contained By:	Dissertations Abstracts International82-10B.
標題:	Polymers. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28330524click for full text (PQDT)
ISBN:	9798597048741

Tailored Metal-Organic Interactions for Energy Harvesting.
Hinckley, Allison Claire.

Tailored Metal-Organic Interactions for Energy Harvesting. - 1 online resource (149 pages)

Source: Dissertations Abstracts International, Volume: 82-10, Section: B.

Thesis (Ph.D.)--Stanford University, 2018.

Includes bibliographical references

A preponderance of data indicates that humanity's reliance on fossil fuels for energy is deleterious to the longevity of our species and habitats. To counter this dependence, efficiency improvements are needed in both the sustainable generation and conversion of energy using materials that are cost-competitive with traditional carbon-heavy energy sources. Organic electronic materials, with their lightweight, ubiquitous elements and promising performance, could meet these demands. However, ongoing challenges like poor conductivity due to lack of long-range order and air-instability through reactions with ambient water and oxygen undermine their efficacy. By structuring organics to better mimic inorganic systems or developing hybrid organic/inorganic materials, we can overcome some of these limitations.In Chapter 2, we develop a model hybrid polymer-metal system to achieve the electrode performance of a conventional metal system at a tenth of the cost. Incorporation of this system into an organic solar cell results in a 7x improvement in the power conversion efficiency over a bare silver electrode without the need for additional costly evaporation steps.In the subsequent chapters, we consider materials for thermoelectric energy harvesting, a compelling technology because of its capability to directly convert waste heat into electrical energy. However, the widespread application of this technology has yet to be realized due to challenges associated with achieving an efficient material for thermoelectric energy conversion. High efficiency would be achieved by a material featuring high thermovoltage and electrical conductivity and thermal insulation. The intrinsically low thermal conductivity of organic systems makes them appealing for thermoelectric applications; however, their performance has been impeded by low charge mobility, arising from a lack of long-range order. In Chapter 3, we investigate a solvent treatment method for inducing greater order in the conductive polymer PEDOT:PSS that results in record electrical conductivities in excess of 8000 S cm-1. By tuning the solvent and other parameters, we are able to double the previous record for solution-processable organic thermoelectric performance.In Chapter 4 and 5, we explore a newly emerging class of hybrid thermoelectric materials: conductive metal-organic frameworks (MOFs). The long-range order in MOFs coupled with their intrinsic porosity hints at a path toward high thermoelectric performance. However, full utilization of this promising material system requires greater understanding of how each of the elements in the MOF affects performance. In Chapter 4, we use the M-HAB family (HAB = hexaaminobenzene, M = Co, Cu, Ni) to explore how the character of the metal ion impacts thermoelectric performance and the air-stability thereof in the resulting 2D stacked MOFs. In Chapter 5, we manipulate the dimensionality of the M-HAB system by preparing the MOF with Zn(II), which prefers a tetrahedral coordination geometry. We successfully synthesize a 3D Zn-HAB MOF and investigate how the metal-ligand coordination effects the thermoelectric performance of the MOF and its air and thermal stability.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798597048741Subjects--Topical Terms:

535398
Polymers.
Subjects--Index Terms:

Energy harvestingIndex Terms--Genre/Form:

542853
Electronic books.

Tailored Metal-Organic Interactions for Energy Harvesting.
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502 $a Thesis (Ph.D.)--Stanford University, 2018.
504 $a Includes bibliographical references
520 $a A preponderance of data indicates that humanity's reliance on fossil fuels for energy is deleterious to the longevity of our species and habitats. To counter this dependence, efficiency improvements are needed in both the sustainable generation and conversion of energy using materials that are cost-competitive with traditional carbon-heavy energy sources. Organic electronic materials, with their lightweight, ubiquitous elements and promising performance, could meet these demands. However, ongoing challenges like poor conductivity due to lack of long-range order and air-instability through reactions with ambient water and oxygen undermine their efficacy. By structuring organics to better mimic inorganic systems or developing hybrid organic/inorganic materials, we can overcome some of these limitations.In Chapter 2, we develop a model hybrid polymer-metal system to achieve the electrode performance of a conventional metal system at a tenth of the cost. Incorporation of this system into an organic solar cell results in a 7x improvement in the power conversion efficiency over a bare silver electrode without the need for additional costly evaporation steps.In the subsequent chapters, we consider materials for thermoelectric energy harvesting, a compelling technology because of its capability to directly convert waste heat into electrical energy. However, the widespread application of this technology has yet to be realized due to challenges associated with achieving an efficient material for thermoelectric energy conversion. High efficiency would be achieved by a material featuring high thermovoltage and electrical conductivity and thermal insulation. The intrinsically low thermal conductivity of organic systems makes them appealing for thermoelectric applications; however, their performance has been impeded by low charge mobility, arising from a lack of long-range order. In Chapter 3, we investigate a solvent treatment method for inducing greater order in the conductive polymer PEDOT:PSS that results in record electrical conductivities in excess of 8000 S cm-1. By tuning the solvent and other parameters, we are able to double the previous record for solution-processable organic thermoelectric performance.In Chapter 4 and 5, we explore a newly emerging class of hybrid thermoelectric materials: conductive metal-organic frameworks (MOFs). The long-range order in MOFs coupled with their intrinsic porosity hints at a path toward high thermoelectric performance. However, full utilization of this promising material system requires greater understanding of how each of the elements in the MOF affects performance. In Chapter 4, we use the M-HAB family (HAB = hexaaminobenzene, M = Co, Cu, Ni) to explore how the character of the metal ion impacts thermoelectric performance and the air-stability thereof in the resulting 2D stacked MOFs. In Chapter 5, we manipulate the dimensionality of the M-HAB system by preparing the MOF with Zn(II), which prefers a tetrahedral coordination geometry. We successfully synthesize a 3D Zn-HAB MOF and investigate how the metal-ligand coordination effects the thermoelectric performance of the MOF and its air and thermal stability.
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