Are Cu2Te-Based Compounds Excellent Thermoelectric Materials?
文献类型：期刊论文
| 作者 | Zhao, Kunpeng; Liu, Ke; Yue, Zhongmou; Wang, Yancheng; Song, Qingfeng; Li, Jian; Guan, Mengjia; Xu, Qing; Qiu, Pengfei; Zhu, Hong |
| 刊名 | ADVANCED MATERIALS
 |
| 出版日期 | 2019-12-30 |
| 卷号 | 31期号:49 |
| ISSN号 | 0935-9648 |
| 关键词 | electrical transport single parabolic bands telluride thermal conductivity thermoelectric materials |
| DOI | 10.1002/adma.201903480 |
| 文献子类 | Article |
| 英文摘要 | Most of the state-of-the-art thermoelectric (TE) materials exhibit high crystal symmetry, multiple valleys near the Fermi level, heavy constituent elements with small electronegativity differences, or complex crystal structure. Typically, such general features have been well observed in those well-known TE materials such as Bi2X3-, SnX-, and PbX-based compounds (X = S, Se, and Te). The performance is usually high in the materials with heavy constituent elements such as Te and Se, but it is low for light constituent elements such as S. However, there is a great abnormality in Cu2X-based compounds in which Cu2Te has much lower TE figure of merit (zT) than Cu2S and Cu2Se. It is demonstrated that the Cu2Te-based compounds are also excellent TE materials if Cu deficiency is sufficiently suppressed. By introducing Ag2Te into Cu2Te, the carrier concentration is substantially reduced to significantly improve the zT with a record-high value of 1.8, 323% improvement over Cu2Te and outperforms any other Cu2Te-based materials. The single parabolic band model is used to further prove that all Cu2X-based compounds are excellent TE materials. Such finding makes Cu2X-based compounds the only type of material composed of three sequent main group elements that all possess very high zT s above 1.5. |
| WOS关键词 | LOW THERMAL-CONDUCTIVITY ; POLYCRYSTALLINE SNSE ; CHEMICAL-STABILITY ; HIGH-EFFICIENCY ; HIGH FIGURE ; PERFORMANCE ; MERIT ; ENERGY ; PBSE ; SYSTEM |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| 语种 | 英语 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 源URL | [http://ir.sic.ac.cn/handle/331005/27524]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Zhao, Kunpeng,Liu, Ke,Yue, Zhongmou,et al. Are Cu2Te-Based Compounds Excellent Thermoelectric Materials?[J]. ADVANCED MATERIALS,2019,31(49). |
| APA | Zhao, Kunpeng.,Liu, Ke.,Yue, Zhongmou.,Wang, Yancheng.,Song, Qingfeng.,...&Shi, Xun.(2019).Are Cu2Te-Based Compounds Excellent Thermoelectric Materials?.ADVANCED MATERIALS,31(49). |
| MLA | Zhao, Kunpeng,et al."Are Cu2Te-Based Compounds Excellent Thermoelectric Materials?".ADVANCED MATERIALS 31.49(2019). |
入库方式： OAI收割
来源：上海硅酸盐研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。