Enhanced thermoelectric performance of twisted bilayer graphene nanoribbons junction

Deng, Shuo; Cai, Xiang; Zhang, Yan; Li, Lijie

doi:10.1016/j.carbon.2019.01.089

Cited by 28 publications

(26 citation statements)

References 59 publications

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“…Inorganic flexible TE materials, including CNTs, ceramics, and 2D materials, could be processed into freestanding thin films or deposited on flexible substrates . Among them, graphene attracts much attention recently in the application of FTEGs, due to its good mechanical properties, high electrical conductivity, and high theoretic calculation result of figure‐of‐merit . However, its low Seebeck coefficient and high thermal conductivity impede the TE application.…”

Section: Functional Components Of Stimesmentioning

confidence: 99%

“…Apart from the bottleneck of materials properties, the harsh processing conditions also impede the scalable production of devices based on many TE materials like rGO. In response to this issue, our group has successfully fabricated the TE device by a low‐temperature and solution‐based method 182b. A wristband‐type TEG was prepared by connecting seven bendable rGO‐based grids electrically in series.…”

Section: Functional Components Of Stimesmentioning

confidence: 99%

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Smart Textile‐Integrated Microelectronic Systems for Wearable Applications

et al. 2019

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The programmable nature of smart textiles makes them an indispensable part of an emerging new technology field. Smart textile‐integrated microelectronic systems (STIMES), which combine microelectronics and technology such as artificial intelligence and augmented or virtual reality, have been intensively explored. A vast range of research activities have been reported. Many promising applications in healthcare, the internet of things (IoT), smart city management, robotics, etc., have been demonstrated around the world. A timely overview and comprehensive review of progress of this field in the last five years are provided. Several main aspects are covered: functional materials, major fabrication processes of smart textile components, functional devices, system architectures and heterogeneous integration, wearable applications in human and nonhuman‐related areas, and the safety and security of STIMES. The major types of textile‐integrated nonconventional functional devices are discussed in detail: sensors, actuators, displays, antennas, energy harvesters and their hybrids, batteries and supercapacitors, circuit boards, and memory devices.

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Section: Functional Components Of Stimesmentioning

confidence: 99%

Section: Functional Components Of Stimesmentioning

confidence: 99%

Smart Textile‐Integrated Microelectronic Systems for Wearable Applications

et al. 2019

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“…Edge defects can also lead to the occurrence of spin-dependent Seebeck effect and the enhancement of charge and spin ZT 5 . A strong reduction of thermal conductance compared with the single graphene nanoribbon has been predicted in twisted bilayer graphene nanoribbon junctions and outstanding ZT values may be achieved in some specific configurations 31 .…”

Section: Thermoelectric Properties Of Graphene-like Nanoribbon Studiementioning

confidence: 98%

“…However, the Seebeck coefficients are usually low in perfect intrinsic ZNRs because the slope of transmission spectra vanishes for both spins near the Fermi level. Breaking the geometry symmetry of ZNRs may modulate the energy dependence of transmission 4,19,29,30 and enhance the Seebeck coefficients 4,5,23,31 . Furthermore, edge disorder may enhance the thermoelectric ZT by reducing dramatically phonon thermal transport but affecting only weakly the electronic conduction 23 .…”

Section: Thermoelectric Properties Of Graphene-like Nanoribbon Studiementioning

confidence: 99%

Thermoelectric properties of graphene-like nanoribbon studied from the perspective of symmetry

Dai

Luo

Wang

2020

Sci Rep

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We have studied the charge and spin thermopower systematically in a ferromagnetic junction of graphene-like zigzag nanoribbon modified by two on-site disorders in the tight-binding model. Symmetries of the transmission spectra and geometry configuration of the two disorders are important factors in determining the thermoelectric properties of the system. Conditions to achieve pure charge and pure spin thermopower are discussed from the perspective of symmetry. Symmetry breaking is required sometimes to obtain large figure of merit. The type and strength of the disorders can be used to further manipulate the spin polarization of thermal current. Disorders inside nanoribbon instead of on edge can then be used to finely tune the performance of the junction. The results may have great application value in designing thermoelectric devices.

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“…A recent study has reported a thermoelectric figure of merit (ZT) up to 1.4 with graphene and C 60 clusters synthesized by chemical vapor deposition (CVD) [92]. Another theoretical investigation revealed three peak ZT values of 2.0, 2.7 and 6.1 at 300 K, with a twisted bilayer graphene nanoribbon junction [93]. As shown in Figure 4, the search for new thermoelectric materials is growing exponentially, but some categories are more attractive than others.…”

Section: New Thermoelectric Materialsmentioning

confidence: 99%

A Review on Thermoelectric Generators: Progress and Applications

Zoui

Bentouba

Stocholm³

et al. 2020

Energies

211

108

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A thermoelectric effect is a physical phenomenon consisting of the direct conversion of heat into electrical energy (Seebeck effect) or inversely from electrical current into heat (Peltier effect) without moving mechanical parts. The low efficiency of thermoelectric devices has limited their applications to certain areas, such as refrigeration, heat recovery, power generation and renewable energy. However, for specific applications like space probes, laboratory equipment and medical applications, where cost and efficiency are not as important as availability, reliability and predictability, thermoelectricity offers noteworthy potential. The challenge of making thermoelectricity a future leader in waste heat recovery and renewable energy is intensified by the integration of nanotechnology. In this review, state-of-the-art thermoelectric generators, applications and recent progress are reported. Fundamental knowledge of the thermoelectric effect, basic laws, and parameters affecting the efficiency of conventional and new thermoelectric materials are discussed. The applications of thermoelectricity are grouped into three main domains. The first group deals with the use of heat emitted from a radioisotope to supply electricity to various devices. In this group, space exploration was the only application for which thermoelectricity was successful. In the second group, a natural heat source could prove useful for producing electricity, but as thermoelectricity is still at an initial phase because of low conversion efficiency, applications are still at laboratory level. The third group is progressing at a high speed, mainly because the investigations are funded by governments and/or car manufacturers, with the final aim of reducing vehicle fuel consumption and ultimately mitigating the effect of greenhouse gas emissions.

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Enhanced thermoelectric performance of twisted bilayer graphene nanoribbons junction

Cited by 28 publications

References 59 publications

Smart Textile‐Integrated Microelectronic Systems for Wearable Applications

Smart Textile‐Integrated Microelectronic Systems for Wearable Applications

Thermoelectric properties of graphene-like nanoribbon studied from the perspective of symmetry

A Review on Thermoelectric Generators: Progress and Applications

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