Identification of a positive-Seebeck-coefficient exohedral fullerene.
Identification of a positive-Seebeck-coefficient exohedral fullerene.
复制标题
正塞贝克系数外面富勒烯的鉴定。
DOI:
10.1039/c6nr02291j
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发表时间:
2016
期刊:
影响因子:
6.7
通讯作者:
Almutlaq N
中科院分区:
文献类型:
--
作者:
Almutlaq N
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.
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影响因子:
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DOI:
--
发表时间:
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期刊:
影响因子:
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