Improvement of thermoelectric performance of copper-deficient compounds Cu-2.5+delta In4.5Te8 (delta=0-0.15) due to a degenerate impurity band and ultralow lattice thermal conductivity
文献类型：期刊论文
| 作者 | Ren, T; Ying, PZ; Cai, GM; Li, XY; Han, ZK; Min, L; Cui, JL |
| 刊名 | RSC ADVANCES
 |
| 出版日期 | 2018 |
| 卷号 | 8期号:48页码:27163-27170 |
| 关键词 | TOTAL-ENERGY CALCULATIONS WAVE BASIS-SET SEMICONDUCTORS VACANCY CUINTE2 ENHANCEMENT SCATTERING EFFICIENCY ALLOYS |
| ISSN号 | 2046-2069 |
| DOI | 10.1039/c8ra05188g |
| 文献子类 | 期刊论文 |
| 英文摘要 | Cu-In-Te ternary chalcogenides have unique crystal and band structures; hence they have received much attention in thermoelectrics. In this work we have observed an enhancement in Hall carrier concentration (n(H)) and ultralow lattice thermal conductivity (K-L) when Cu was added to ternary Cu2.5+delta In4.5Te8 (delta = 0-0.15) compounds. The enhancement in n(H) is attributed to a degenerate impurity band at the G point in the valence band maximum (VBM), while the extremely low K-L results from the increased lattice disorder. We thus obtained the minimum K-L value of only 0.23 W K-1 m(-1) in the sample at delta = 0.1 and 820 K, which is in good agreement with the calculation using the Callaway model. The highest thermoelectric figure of merit ZT is 0.84 for the material at delta = 0.1, which is about 0.38 higher than that of the pristine Cu2.5In4.5Te8. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/30983]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Appl Phys, Div Interfacial Water, Shanghai 201800, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China 3.China Univ Min & Technol, Mat Sci & Engn Coll, Xuzhou 221116, Jiangsu, Peoples R China 4.Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China 5.Ningbo Univ Technol, Sch Mat & Chem Engn, Ningbo 315016, Zhejiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ren, T,Ying, PZ,Cai, GM,et al. Improvement of thermoelectric performance of copper-deficient compounds Cu-2.5+delta In4.5Te8 (delta=0-0.15) due to a degenerate impurity band and ultralow lattice thermal conductivity[J]. RSC ADVANCES,2018,8(48):27163-27170. |
| APA | Ren, T.,Ying, PZ.,Cai, GM.,Li, XY.,Han, ZK.,...&Cui, JL.(2018).Improvement of thermoelectric performance of copper-deficient compounds Cu-2.5+delta In4.5Te8 (delta=0-0.15) due to a degenerate impurity band and ultralow lattice thermal conductivity.RSC ADVANCES,8(48),27163-27170. |
| MLA | Ren, T,et al."Improvement of thermoelectric performance of copper-deficient compounds Cu-2.5+delta In4.5Te8 (delta=0-0.15) due to a degenerate impurity band and ultralow lattice thermal conductivity".RSC ADVANCES 8.48(2018):27163-27170. |
入库方式： OAI收割
来源：上海应用物理研究所
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