Nanostructured Thin Films of Thermoelectric Oxides

Mele, Paolo

doi:10.1007/978-3-319-14478-8_8

Cited by 4 publications

(6 citation statements)

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“…135 The thin film studies also focused on other notable layered cobaltates such as Ca 3 Co 4 O 9 , Bi 2 Sr 2 Co 2 O y etc. We will not focus our discussions on Ca 3 Co 4 O 9 , as this material has received considerable attention in a recent review article, 35 but we will discuss the growth efforts on Bi 2 Sr 2 Co 2 O y and related compounds. [141][142][143][144][145][146][147][148][149][150] The common techniques used for the growth of cobaltates were pulsed laser deposition, chemical solution deposition, and RF sputtering.…”

Section: B Cobaltatesmentioning

confidence: 99%

“…[27][28][29][30][31][32][33][34] Despite growing interest in thin film oxide thermoelectrics, as far as I am aware of, only one study surveys thermoelectric studies on thin films materials in depth, but was limited to two materials systems namely ZnO and Ca 3 Co 4 O 9 . 35 The aim of this review is to bridge the gap in earlier reviews on studies related to low dimensional thermoelectric oxide materials and also, place an emphasis on discussing the physics behind achieving large thermoelectric figure of merit in these materials. Specifically, this review will discuss the recent developments in the study of thermoelectric and thermal transport behavior of complex oxides, synthesized in the form of thin films, heterostructures, and superlattices.…”

Section: Introductionmentioning

confidence: 99%

“…120 The second materials family is the layered cobaltate family, which is the best p-type conducting oxide thermoelectric materials system. There are few reviews, which cover some aspects of this materials system, such as Ca 3 Co 4 O 9 thin films, 31,35 and cobaltate thin films prepared by reactive solid-phase epitaxy with topotactic ion-exchange methods. 166 Hence, this section will focus on studies, which are not covered by these reviews.…”

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confidence: 99%

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Thermoelectric and thermal transport properties of complex oxide thin films, heterostructures and superlattices

Ravichandran

2016

J. Mater. Res.

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Over the years, the search for high performance thermoelectric materials has been dictated by the "phonon glass and electron crystal (PGEC)" paradigm, which suggests that low band gap semiconductors with high atomic number elements and high carrier mobility are the ideal materials to achieve high thermoelectric figure of merit. Complex oxides provide alternative mechanisms such as large density of states and strong electron correlation for high thermoelectric efficiency, albeit having low carrier mobility. Due to vast structural and chemical flexibility, they provide a fertile playground to design high efficiency thermoelectric materials. Further, developments in oxide thin film growth methods have enabled synthesis of high quality, atomically precise low dimensional structures such as heterostructures and superlattices. These materials and structures act as excellent model systems to explore nanoscale thermal and thermoelectric transport, which will not only expand the frontier of our knowledge, but also continue to enable cutting edge applications.

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Section: B Cobaltatesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Thermoelectric and thermal transport properties of complex oxide thin films, heterostructures and superlattices

Ravichandran

2016

J. Mater. Res.

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“…Also, control on microstructural properties of the films, including grain size and orientation, and film thickness, is possible by tuning the concentration of the precursor solutions and the thermal cycles. However, films produced by sol-gel usually contain more microstructural defects than by PLD, and this can strongly influence the ED of the deposited material [ 160 , 161 , 172 ].…”

Section: Tuning Energy Density By Processing Methodsmentioning

confidence: 99%

Strategies to Improve the Energy Storage Properties of Perovskite Lead-Free Relaxor Ferroelectrics: A Review

et al. 2020

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Electrical energy storage systems (EESSs) with high energy density and power density are essential for the effective miniaturization of future electronic devices. Among different EESSs available in the market, dielectric capacitors relying on swift electronic and ionic polarization-based mechanisms to store and deliver energy already demonstrate high power densities. However, different intrinsic and extrinsic contributions to energy dissipations prevent ceramic-based dielectric capacitors from reaching high recoverable energy density levels. Interestingly, relaxor ferroelectric-based dielectric capacitors, because of their low remnant polarization, show relatively high energy density and thus display great potential for applications requiring high energy density properties. In this study, some of the main strategies to improve the energy density properties of perovskite lead-free relaxor systems are reviewed, including (i) chemical modification at different crystallographic sites, (ii) chemical additives that do not target lattice sites, and (iii) novel processing approaches dedicated to bulk ceramics, thick and thin films, respectively. Recent advancements are summarized concerning the search for relaxor materials with superior energy density properties and the appropriate choice of both composition and processing routes to match various applications’ needs. Finally, future trends in computationally-aided materials design are presented.

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“…The energy conversion efficiency of thermoelectric (TE) materials is related to the figure of merit where PF is the power factor, S is the Seebeck coefficient, σ is the electrical conductivity, and κ is the thermal conductivity, which consist of lattice and electronic contributions . The higher the ZT the better the TE performance; hence, materials operating at higher temperature T , with large S , high σ, and low κ are desired . Most of the semiconducting TE materials such as Bi 2 Te 3 or Sb 2 Te 3 exhibit figure of merit, ZT ≈ 1–2; however, the chemical and physical instability at high temperatures as well as oxidizing conditions along with relatively high toxicity make them unpractical at high temperatures. , …”

Section: Introductionmentioning

confidence: 99%

High-Temperature Thermoelectricity in LaNiO₃–La₂CuO₄ Heterostructures

Kaya

Gregori

Baiutti

et al. 2018

ACS Appl. Mater. Interfaces

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Transition metal oxides exhibit a high potential for application in the field of electronic devices, energy storage, and energy conversion. The ability of building these types of materials by atomic layer-by-layer techniques provides a possibility to design novel systems with favored functionalities. In this study, by means of the atomic layer-by-layer oxide molecular beam epitaxy technique, we designed oxide heterostructures consisting of tetragonal KNiF-type insulating LaCuO (LCO) and perovskite-type conductive metallic LaNiO (LNO) layers with different thicknesses to assess the heterostructure-thermoelectric property-relationship at high temperatures. We observed that the transport properties depend on the constituent layer thickness, interface intermixing, and oxygen-exchange dynamics in the LCO layers, which occurs at high temperatures. As the thickness of the individual layers was reduced, the electrical conductivity decreased and the sign of the Seebeck coefficient changed, revealing the contribution of the individual layers where possible interfacial contributions cannot be ruled out. High-resolution scanning transmission electron microscopy investigations showed that a substitutional solid solution of La(CuNi)O was formed when the thickness of the constituent layers was decreased.

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Nanostructured Thin Films of Thermoelectric Oxides

Cited by 4 publications

References 115 publications

Thermoelectric and thermal transport properties of complex oxide thin films, heterostructures and superlattices

Thermoelectric and thermal transport properties of complex oxide thin films, heterostructures and superlattices

Strategies to Improve the Energy Storage Properties of Perovskite Lead-Free Relaxor Ferroelectrics: A Review

High-Temperature Thermoelectricity in LaNiO₃–La₂CuO₄ Heterostructures

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Nanostructured Thin Films of Thermoelectric Oxides

Cited by 4 publications

References 115 publications

Thermoelectric and thermal transport properties of complex oxide thin films, heterostructures and superlattices

Thermoelectric and thermal transport properties of complex oxide thin films, heterostructures and superlattices

Strategies to Improve the Energy Storage Properties of Perovskite Lead-Free Relaxor Ferroelectrics: A Review

High-Temperature Thermoelectricity in LaNiO3–La2CuO4 Heterostructures

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High-Temperature Thermoelectricity in LaNiO₃–La₂CuO₄ Heterostructures