Nanostructured thermoelectric materials

Harman, T. C.; Walsh, Michael P.; LaForge, B. E.; Turner, G. W.

doi:10.1007/s11664-005-0083-8

Cited by 318 publications

(166 citation statements)

References 8 publications

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“…The other two strategies are to form second phase nanoinclusions (Figure 10 (b) and (c)), where a large number of interfaces are formed between the TE materials and nanoinclusions [48] . Fig.10 Approaches for Bulk TE Nanocomposites: (a) Nanograined Composite, (b) Nanoinclusion Composite with an Incoherent Interface, and (c) Nanoinclusion Composite with a Coherent Interface [48] For example, high values of ZT, ranging from 1.6 at 300 K to 3 at 550 K for Bi-doped n-type PbSeTe/PbTe quantum-dot super lattice samples grown by molecular beam epitaxy, are reported by Harman et al [49] . Cu2Se nanocomposites show a very high ZT of above 2.1 at T ≈ 973 K, which is about 40% higher than its bulk counterpart [50] .…”

Section: Nanoscale and Nanostructured Te Materialsmentioning

confidence: 99%

An Overview of Advanced Chalcogenide Thermo- electric Materials and Their Applications

Tesfaye¹

2018

JERA

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Thermoelectricity is a strong scientific and technological interest due to its wide application ranging from clean energy producing to photon sensing devices. Recent developments in theoretical studies on the thermoelectric (TE) effects as well as the newly discovered thermoelectric materials provide new opportunities for several applications. Though the scale of production is limited, thermoelectric technology provides an alternative to traditional methods of power generation, heating and cooling systems. TE technologies can be used in power generation, heating and cooling applications. They potentially offer significant energy savings through waste heat recovery and augmented cooling. This article critically discusses the current progress in chalcogenide TE materials and the advantages and limitations associated with the TE technologies. The need for new materials discoveries from the point of view of achieving higher figure-of-merit combined with thermal stabilities in intermediate-and hightemperature Peltier and Seebeck effects applications is also emphasized. Besides, this article aims to evaluate the main features of recently characterized multicomponent chalcogenide ionic compounds with high thermal stabilities as potential TE materials to harvest electric power from high-temperature heat flux via thermoelectricity.

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Section: Nanoscale and Nanostructured Te Materialsmentioning

confidence: 99%

An Overview of Advanced Chalcogenide Thermo- electric Materials and Their Applications

Tesfaye¹

2018

JERA

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“…Hence, ZT values have been limited to below 1 until Hicks and Dresselhaus [54,55] theoretically proved that low-dimensional materials could have higher ZT than their bulk analogues, due both to their lower thermal conductivity and to quantum confinement effects. The highest known ZT value (ZT =3.0 at 550 K) was achieved in Bi-doped n-type PbSeTe/PbTe quantum-dot superlattices (QDSLs) grown by molecular beam epitaxy (MBE) [56]. Han et al [2] summarized the recent progress on different kinds of thermoelectric materials in their comprehensive review and pointed out that nanostructuring was the most important strategy for enhancing ZT values, not only because nanostructuring could effectively decrease thermal conductivity, but also because it could cause an energy filtering effect that increases the Seebeck coefficient.…”

Section: Thermoelectric Conversionmentioning

confidence: 99%

Effects of nanostructure on clean energy: big solutions gained from small features

Xiong

Han

et al. 2015

Science Bulletin

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The increasing energy consumption and environmental concerns have driven the development of costeffective, high-efficiency clean energy. Advanced functional nanomaterials and relevant nanotechnologies are playing a crucial role and showing promise in resolving some energy issues. In this view, we focus on recent advances of functional nanomaterials in clean energy applications, including solar energy conversion, water splitting, photodegradation, electrochemical energy conversion and storage, and thermoelectric conversion, which have attracted considerable interests in the regime of clean energy. Abstract The increasing energy consumption and environmental concerns have driven the development of costeffective, high-efficiency clean energy. Advanced functional nanomaterials and relevant nanotechnologies are playing a crucial role and showing promise in resolving some energy issues. In this view, we focus on recent advances of functional nanomaterials in clean energy applications, including solar energy conversion, water splitting, photodegradation, electrochemical energy conversion and storage, and thermoelectric conversion, which have attracted considerable interests in the regime of clean energy.

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“…Important results in the development of highly effective nanostructured thermoelectric materials have been published last decade; see for example the reviews (Dresselhaus et al, 2007;Minnich et al, 2009;Dmitriev & Zvyagin, 2010;Lan et al, 2010). The thermoelectric efficiency ZT = 2.4 has been reached at T = 300K in the p-type semiconductor Bi 2 Te 3 /Sb 2 Te 3 in superlattices with quantum wells (Venkatasubramanian et al, 2001); the estimation indicates that the value ZT ~ 3.5 has been received at T = 575 K in nanostructured n-type PbSeTe/PbTe with quantum dots (Harman et al, 2000(Harman et al, , 2005. It is possible also to include thermotunnel elements (thermal diodes) to nanostructured thermoelectrics in which there exists the electron tunneling through a narrow vacuum or air gap (Tavkhelidze et al, 2002).…”

Section: Zt T   mentioning

confidence: 99%