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DOI | 10.1039/c9ee03897c |
Fermi-surface dynamics and high thermoelectric performance along the out-of-plane direction in n-type SnSe crystals | |
Mao L.; Yin Y.; Zhang Q.; Liu G.-Q.; Wang H.; Guo Z.; Hu H.; Xiao Y.; Tan X.; Jiang J. | |
发表日期 | 2020 |
ISSN | 17545692 |
起始页码 | 616 |
结束页码 | 621 |
卷号 | 13期号:2 |
英文摘要 | The layered chalcogenide SnSe has attracted great interest for its remarkable ZT records. Here, we report the excellent thermoelectric performance of n-type SnSe single crystals by alloying with PbBr2, where a maximum ZT of 2.1 at 770 K is achieved along the out-of-plane direction. Interestingly, we observed a sharp drop of the carrier mobility at PbBr2 content x = 3%, which terminates the continuous increase of ZT from x = 0.5% to x = 2%. It is shown that the anomalous decrease is due to the evolution of the Fermi surface driven by the enlargement of the out-of-plane axis. When 1% Sn is substituted by Ge, the restoration of the Fermi surface increases the ZT for the x = 3% sample by 200%. This study reveals the crucial role of the Fermi-surface dynamics in n-type SnSe, and the consequent strategy is confirmed to be highly efficient in the optimization of thermoelectric performance. © 2020 The Royal Society of Chemistry. |
英文关键词 | Fermi surface; Layered semiconductors; Lead alloys; Thermoelectricity; Tin compounds; Layered chalcogenides; Out-of plane; Out-of-plane direction; SnSe crystals; Surface dynamics; Thermoelectric performance; Tin alloys; efficiency measurement; electricity; inorganic compound; optimization; performance assessment; thermal power |
语种 | 英语 |
来源期刊 | Energy & Environmental Science |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/189711 |
作者单位 | Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China |
推荐引用方式 GB/T 7714 | Mao L.,Yin Y.,Zhang Q.,et al. Fermi-surface dynamics and high thermoelectric performance along the out-of-plane direction in n-type SnSe crystals[J],2020,13(2). |
APA | Mao L..,Yin Y..,Zhang Q..,Liu G.-Q..,Wang H..,...&Jiang J..(2020).Fermi-surface dynamics and high thermoelectric performance along the out-of-plane direction in n-type SnSe crystals.Energy & Environmental Science,13(2). |
MLA | Mao L.,et al."Fermi-surface dynamics and high thermoelectric performance along the out-of-plane direction in n-type SnSe crystals".Energy & Environmental Science 13.2(2020). |
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