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arXiv 1502.01137cond-mat.mes-hallcond-mat.mtrl-sci
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石墨炔:一种高优值二维热电材料

Graphdiyne: a two-dimensional thermoelectric material with high figure of merit

L. Sun, P. H. Jiang, H. J. Liu, D. D. Fan, J. H. Liang, J. Wei, L. Cheng, J. Zhang, J. Shi

摘要:

石墨二炔作为一种新型的碳同素异形体,由于其独特的二维结构而引起了人们的广泛关注。在这里,我们通过多尺度计算证明,与石墨烯不同,graphdiyne具有天然的带隙,同时具有高电导率,大塞贝克系数和低热导率。在空穴和电子的载流子浓度分别为2.74*10^11/cm ^2和1.62*10^11/cm ^2时,石墨烯的室温ZT值可分别优化为3.0和4.8,这使其成为热电界实现“声子-玻璃和电子-晶体”概念的理想体系。

英文摘要:

As a new carbon allotrope, the recently fabricated graphdiyne has attracted much attention due to its interesting two-dimensional character. Here we demonstrate by multiscale computations that, unlike graphene, graphdiyne has a natural band gap, and simultaneously possess high electrical conductivity, large Seebeck coefficient, and low thermal conductivity. At a carrier concentration of 2.74*10^11/cm^2 for holes and 1.62*10^11/cm^2 for electrons, the room temperature ZT value of graphdiyne can be optimized to 3.0 and 4.8, respectively, which makes it an ideal system to realize the concept of "phonon-glass and electron-crystal" in the thermoelectric community.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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