Ballistic electrical-thermal transport properties and their applications in graphene-nanoribbon-stacked heterojunctions

Zhang, Xian-Ran; Peng, Xiao-Fang; Tan, Shi-Hua

doi:10.1016/j.physe.2021.115025

Cited by 6 publications

(3 citation statements)

References 47 publications

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“…We further analyze the vibrational properties in the frequency domain with and without the FIGURE 1 | Sketch of the thermoelectric conversion process driven by thermophoresis and piezoelectric effects. The concentric carbon nanotube is made of an [4,4] inner tube and [8,8] outer tube with the length of 36.9 and 3.3 nm, respectively. An armchair edge MoS 2 nanoribbon with the length of 21.9 nm is adopted, and the different widths of the nanoribbon (1.…”

Section: Resultsmentioning

confidence: 99%

“…The thermoelectric and piezoelectric effects, which, respectively, convert heat and mechanical energy into electricity, have attracted tremendous attention in the past few decades. Significant efforts have been devoted to improving thermoelectric conversion efficiency by suppressing lattice thermal conductivity [1][2][3][4][5][6][7][8] or engineering electronic band structures [9][10][11][12][13][14][15][16][17] to enhance the power factor. However, thermoelectric conversion efficiency is still limited by the complex coupling relations between phonons and electrons [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Thermoelectric Conversion From Interface Thermophoresis and Piezoelectric Effects

et al. 2022

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Piezoelectric effect has proved itself to be a promising energy conversion mechanism that can convert mechanical energy into electricity. Here, we propose an indirect thermoelectric conversion mechanism based on a combination of the thermophoresis and piezoelectric effects. We first analyze this thermally driven mechanism using a simplified theoretical model and then numerically analyze a molecular dynamics (MD) simulation of a hybrid system constructed of a single-layer MoS2 nanoribbon and a concentric carbon nanotube. We show that the thermophoresis-induced piezoelectric output voltage can reach 3.5 V, and this value can be tuned using a temperature difference. The output voltage obtained using this mechanism is significantly higher than that obtained by heating piezoelectric materials directly. Given the generality of the thermophoresis effect in Van der Waals structures, this mechanism has potential applications in the conversion of thermal energy into electrical energy at the nanoscale level.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermoelectric Conversion From Interface Thermophoresis and Piezoelectric Effects

et al. 2022

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“…For example, phonon transport in graphene molecular junctions can be suppressed by tuning the interlayer coupling of the π-stack, thus improving the thermoelectric properties of the system [29]. Zhang et al reported that thermoelectric properties can be improved by modulating the interlayer coupling of bilayer graphene nanoribbons [30]. However, the interlayer coupling that modulate black arsenic is still lacking, there is a great need to advance the theoretical studies to further guide the related experiments.…”

Section: Introductionmentioning

confidence: 99%

Interlayer coupling modulated for thermoelectric transport characterization of black arsenic nanoscale devices

Shi,

Xu,

Qiu

et al. 2024

J. Phys.: Condens. Matter

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Modulating interlayer coupling modes can effectively enhance the thermoelectric properties of nano materials or nanoscale devices. By using density functional theory (DFT) combined with non-equilibrium Green's function (NEGF) method, we investigate the thermoelectric properties of zigzag-type black arsenic nanoscale devices with varying interlayer coupling modes. Our results show that altering the interlayer coupling mode significantly modulates the thermoelectric properties of the system. Specifically, we consider four coupling modes with different strengths, by modulating different interlayer overlap patterns. Notably, in the weaker interlayer coupling mode, the system exhibits enhanced thermoelectric properties due to increased interface phonon scattering, reaching a peak value of 2.23 at μ =-0.73eV. Furthermore, we explore the temperature-dependent behavior of each coupling model. The results suggest that the thermoelectric characteristics are more sensitive to temperature variations in the weaker coupling modes. These insights provide valuable guidance for enhancing the thermoelectric performance of nano-scale devices through precise interlayer coupling modulation.

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Thermoelectric properties of armchair graphene nanoribbons: importance of quantum confinement

Ajeel,

Ahmed

2024

J Nanopart Res

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Ballistic electrical-thermal transport properties and their applications in graphene-nanoribbon-stacked heterojunctions

Cited by 6 publications

References 47 publications

Thermoelectric Conversion From Interface Thermophoresis and Piezoelectric Effects

Thermoelectric Conversion From Interface Thermophoresis and Piezoelectric Effects

Interlayer coupling modulated for thermoelectric transport characterization of black arsenic nanoscale devices

Thermoelectric properties of armchair graphene nanoribbons: importance of quantum confinement

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