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Identification of a positive-Seebeck-coefficient exohedral fullerene

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Identification of a positive-Seebeck-coefficient exohedral fullerene. / Almutlaq, Nasser; Al-Galiby, Qusiy; Bailey, Steven William Dennis; Lambert, Colin John.

In: Nanoscale, Vol. 2016, No. 28, 28.07.2016, p. 13597-13602.

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@article{46e2803ed653434abd350fe47b6b206f,
title = "Identification of a positive-Seebeck-coefficient exohedral fullerene",
abstract = "If fullerene-based thermoelectricity is to become a viable technology, then fullerenes exhibiting both positive and negative Seebeck coefficients are needed. C60 is known to have a negative Seebeck coefficient and therefore in this paper we address the challenge of identifying a positive-Seebeck-coefficient fullerene. We investigated the thermoelectric properties of single-molecule junctions of the exohedral fullerene C50Cl10 connected to gold electrodes and found that it indeed possesses a positive Seebeck coefficient. Furthermore, in common with C60, the Seebeck coefficient can be increased by placing more than one C50Cl10 in series. For a single C50Cl10, we find S = +8 μV K−1 and for two C50Cl10's in series we find S = +30 μV K−1. We also find that the C50Cl10 monomer and dimer have power factors of 0.5 × 10−5 W m−1 K−2 and 6.0 × 10−5 W m−1 K−2 respectively. These results demonstrate that exohedral fullerenes provide a new class of thermoelectric materials with desirable properties, which complement those of all-carbon fullerenes, thereby enabling the boosting of the thermovoltage in all-fullerene tandem structures.",
author = "Nasser Almutlaq and Qusiy Al-Galiby and Bailey, {Steven William Dennis} and Lambert, {Colin John}",
year = "2016",
month = jul,
day = "28",
doi = "10.1039/C6NR02291J",
language = "English",
volume = "2016",
pages = "13597--13602",
journal = "Nanoscale",
issn = "2040-3364",
publisher = "Royal Society of Chemistry",
number = "28",

}

RIS

TY - JOUR

T1 - Identification of a positive-Seebeck-coefficient exohedral fullerene

AU - Almutlaq, Nasser

AU - Al-Galiby, Qusiy

AU - Bailey, Steven William Dennis

AU - Lambert, Colin John

PY - 2016/7/28

Y1 - 2016/7/28

N2 - If fullerene-based thermoelectricity is to become a viable technology, then fullerenes exhibiting both positive and negative Seebeck coefficients are needed. C60 is known to have a negative Seebeck coefficient and therefore in this paper we address the challenge of identifying a positive-Seebeck-coefficient fullerene. We investigated the thermoelectric properties of single-molecule junctions of the exohedral fullerene C50Cl10 connected to gold electrodes and found that it indeed possesses a positive Seebeck coefficient. Furthermore, in common with C60, the Seebeck coefficient can be increased by placing more than one C50Cl10 in series. For a single C50Cl10, we find S = +8 μV K−1 and for two C50Cl10's in series we find S = +30 μV K−1. We also find that the C50Cl10 monomer and dimer have power factors of 0.5 × 10−5 W m−1 K−2 and 6.0 × 10−5 W m−1 K−2 respectively. These results demonstrate that exohedral fullerenes provide a new class of thermoelectric materials with desirable properties, which complement those of all-carbon fullerenes, thereby enabling the boosting of the thermovoltage in all-fullerene tandem structures.

AB - If fullerene-based thermoelectricity is to become a viable technology, then fullerenes exhibiting both positive and negative Seebeck coefficients are needed. C60 is known to have a negative Seebeck coefficient and therefore in this paper we address the challenge of identifying a positive-Seebeck-coefficient fullerene. We investigated the thermoelectric properties of single-molecule junctions of the exohedral fullerene C50Cl10 connected to gold electrodes and found that it indeed possesses a positive Seebeck coefficient. Furthermore, in common with C60, the Seebeck coefficient can be increased by placing more than one C50Cl10 in series. For a single C50Cl10, we find S = +8 μV K−1 and for two C50Cl10's in series we find S = +30 μV K−1. We also find that the C50Cl10 monomer and dimer have power factors of 0.5 × 10−5 W m−1 K−2 and 6.0 × 10−5 W m−1 K−2 respectively. These results demonstrate that exohedral fullerenes provide a new class of thermoelectric materials with desirable properties, which complement those of all-carbon fullerenes, thereby enabling the boosting of the thermovoltage in all-fullerene tandem structures.

U2 - 10.1039/C6NR02291J

DO - 10.1039/C6NR02291J

M3 - Journal article

VL - 2016

SP - 13597

EP - 13602

JO - Nanoscale

JF - Nanoscale

SN - 2040-3364

IS - 28

ER -