Improving Thermoelectric Performance of alpha-MgAgSb by Theoretical Band Engineering Design
文献类型：期刊论文
| 作者 | Tan, Xiaojian; Wang, Ling; Shao, Hezhu; Yue, Song; Xu, Jingtao; Liu, Guoqiang; Jiang, Haochuan; Jiang, Jun |
| 刊名 | ADVANCED ENERGY MATERIALS
 |
| 出版日期 | 2017 |
| 卷号 | 7期号:18页码:1700076 |
| ISSN号 | 1614-6832 |
| 英文摘要 | alpha-MgAgSb is recently discovered to be a new class of thermoelectric material near room temperature. A competitive ZT of 1.4 at 525 K is achieved in Ni-doped alpha-MgAgSb, and the measured efficiency of energy conversion reaches a record value of 8.5%, which is even higher than that of the commercially applied material bismuth telluride. On the other hand, the band structure of alpha-MgAgSb is believed to be unprofitable to the power factor, owing to the less degenerate valence valleys. Here, this paper reports a systematic theoretical study on the thermoelectric properties by using the electron/phonon structure and transport calculations. Based on the careful analysis of Fermi surface, a principled scheme is presented to design band engineering in alpha-MgAgSb. Following the given rules, several effective dopants are predicted. As two examples, Zn- and Pd-doped alpha-MgAgSb are numerically confirmed to exhibit an extraordinary ZT value of 2.0 at 575 K and a high conversion efficiency of 12.6%, owing to the effects of band convergence. This work develops an applicable scheme for the purposive design of band engineering, and the idea can be simply applied to more thermoelectric materials. |
| 公开日期 | 2017-12-25 |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/13615]  |
| 专题 | 2017专题 |
| 推荐引用方式 GB/T 7714 | Tan, Xiaojian,Wang, Ling,Shao, Hezhu,et al. Improving Thermoelectric Performance of alpha-MgAgSb by Theoretical Band Engineering Design[J]. ADVANCED ENERGY MATERIALS,2017,7(18):1700076. |
| APA | Tan, Xiaojian.,Wang, Ling.,Shao, Hezhu.,Yue, Song.,Xu, Jingtao.,...&Jiang, Jun.(2017).Improving Thermoelectric Performance of alpha-MgAgSb by Theoretical Band Engineering Design.ADVANCED ENERGY MATERIALS,7(18),1700076. |
| MLA | Tan, Xiaojian,et al."Improving Thermoelectric Performance of alpha-MgAgSb by Theoretical Band Engineering Design".ADVANCED ENERGY MATERIALS 7.18(2017):1700076. |
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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