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MoS2 nano flakes with self-adaptive contacts for efficient thermoelectric energy harvesting

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MoS2 nano flakes with self-adaptive contacts for efficient thermoelectric energy harvesting. / Wu, Qingqing; Sadeghi, Hatef; Lambert, Colin John.

In: Nanoscale, Vol. 10, No. 16, 28.04.2018, p. 7575-7580.

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@article{9ee573335c1c490b9365e22c08963a32,
title = "MoS2 nano flakes with self-adaptive contacts for efficient thermoelectric energy harvesting",
abstract = "We examine the potential of the low-dimensional material MoS2 for the efficient conversion of waste heat to electricity via the Seebeck effect. Recently monolayer MoS2 nano flakes with self-adaptive Mo6S6 contacts were formed, which take advantage of mechanical stability and chemical covalent bonding to the MoS2. Here, we study the thermoelectric properties of these junctions by calculating their conductance, thermopower and thermal conductance due to both electrons and phonons. We show that thermoelectric figures of merit ZT as high as ∼2.8 are accessible in these junctions, independent of the flake size and shape, provided the Fermi energy is close to a band edge. We show that Nb dopants as substituents for Mo atoms can be used to tune the Fermi energy, and despite the associated inhomogeneous broadening, room temperature values as high as ZT ∼ 0.6 are accessible, increasing to 0.8 at 500 K.",
author = "Qingqing Wu and Hatef Sadeghi and Lambert, {Colin John}",
year = "2018",
month = apr,
day = "28",
doi = "10.13039/501100000275",
language = "English",
volume = "10",
pages = "7575--7580",
journal = "Nanoscale",
issn = "2040-3364",
publisher = "Royal Society of Chemistry",
number = "16",

}

RIS

TY - JOUR

T1 - MoS2 nano flakes with self-adaptive contacts for efficient thermoelectric energy harvesting

AU - Wu, Qingqing

AU - Sadeghi, Hatef

AU - Lambert, Colin John

PY - 2018/4/28

Y1 - 2018/4/28

N2 - We examine the potential of the low-dimensional material MoS2 for the efficient conversion of waste heat to electricity via the Seebeck effect. Recently monolayer MoS2 nano flakes with self-adaptive Mo6S6 contacts were formed, which take advantage of mechanical stability and chemical covalent bonding to the MoS2. Here, we study the thermoelectric properties of these junctions by calculating their conductance, thermopower and thermal conductance due to both electrons and phonons. We show that thermoelectric figures of merit ZT as high as ∼2.8 are accessible in these junctions, independent of the flake size and shape, provided the Fermi energy is close to a band edge. We show that Nb dopants as substituents for Mo atoms can be used to tune the Fermi energy, and despite the associated inhomogeneous broadening, room temperature values as high as ZT ∼ 0.6 are accessible, increasing to 0.8 at 500 K.

AB - We examine the potential of the low-dimensional material MoS2 for the efficient conversion of waste heat to electricity via the Seebeck effect. Recently monolayer MoS2 nano flakes with self-adaptive Mo6S6 contacts were formed, which take advantage of mechanical stability and chemical covalent bonding to the MoS2. Here, we study the thermoelectric properties of these junctions by calculating their conductance, thermopower and thermal conductance due to both electrons and phonons. We show that thermoelectric figures of merit ZT as high as ∼2.8 are accessible in these junctions, independent of the flake size and shape, provided the Fermi energy is close to a band edge. We show that Nb dopants as substituents for Mo atoms can be used to tune the Fermi energy, and despite the associated inhomogeneous broadening, room temperature values as high as ZT ∼ 0.6 are accessible, increasing to 0.8 at 500 K.

U2 - 10.13039/501100000275

DO - 10.13039/501100000275

M3 - Journal article

VL - 10

SP - 7575

EP - 7580

JO - Nanoscale

JF - Nanoscale

SN - 2040-3364

IS - 16

ER -