Fermi-surface dynamics and high thermoelectric performance along the out-of-plane direction in n-type SnSe crystals
文献类型：期刊论文
| 作者 | Mao, Lisha; Yin, Yinong; Zhang, Qiang; Liu, Guo-Qiang; Wang, Hongxiang; Guo, Zhe; Hu, Haoyang; Xiao, Yukun; Tan, Xiaojian; Jiang, Jun |
| 刊名 | ENERGY & ENVIRONMENTAL SCIENCE
 |
| 出版日期 | 2020 |
| 卷号 | 13期号:2页码:616-621 |
| 关键词 | POLYCRYSTALLINE SNSE THERMAL-CONDUCTIVITY POWER FIGURE MERIT PB |
| DOI | 10.1039/c9ee03897c |
| 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. |
| 学科主题 | Chemistry ; Energy & Fuels ; Engineering ; Environmental Sciences & Ecology |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/20060]  |
| 专题 | 2020专题 2020专题_期刊论文 |
| 作者单位 | 1.Jiang, J (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China. 2.Liu, GQ 3.Tan, XJ 4.Jiang, J (corresponding author), Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Mao, Lisha,Yin, Yinong,Zhang, Qiang,et al. Fermi-surface dynamics and high thermoelectric performance along the out-of-plane direction in n-type SnSe crystals[J]. ENERGY & ENVIRONMENTAL SCIENCE,2020,13(2):616-621. |
| APA | Mao, Lisha.,Yin, Yinong.,Zhang, Qiang.,Liu, Guo-Qiang.,Wang, Hongxiang.,...&Jiang, Jun.(2020).Fermi-surface dynamics and high thermoelectric performance along the out-of-plane direction in n-type SnSe crystals.ENERGY & ENVIRONMENTAL SCIENCE,13(2),616-621. |
| MLA | Mao, Lisha,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):616-621. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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