| High Temperature Thermoelectric Response of Electron-Doped CaMnO3 | |
| Wang, Yang1,3; Sui, Yu1,2; Fan, Hongjin3; Wang, Xianjie1; Su, Yantao1; Su, Wenhui1; Liu, Xiaoyang4 | |
| Corresponding Author | Sui, Yu(suiyu@hit.edu.cn) |
| 2009-10-13 | |
| Source Publication | CHEMISTRY OF MATERIALS
 |
| ISSN | 0897-4756 |
| Volume | 21Issue:19Pages:4653-4660 |
| Abstract | We report a systematical investigation on the high temperature thermoelectric response of Ca1-xRxMnO3 (R = rare-earth) perovskites in the electron-doped range. The results reveal that electron concentration is the dominant factor for the high temperature electrical transport properties whereas the weight and size of R ions dominate the thermal transport properties. As the doping level varies, the best thermoelectric performance is observed at the relative electron concentration around 0.1. However, in the case of a fixed electron concentration, structural distortions become important since bandwidth has an observable influence on resistivity. By combining the three factors, electron concentration, crystal structure, and the weight/size of R ions, the largest thermoelectric figure of merit ZT for Ca1-xRxMnO3 reaches 0.2 at 1000 K. But this ZT value is still too far from the application criterion (ZT > 1). Using the dynamical mean field theory, we demonstrate that a ZT value larger than one in electron-doped CaMnO3 systems seems rather unlikely. Some strategies for searching new thermoelectric materials with high performance in transition metal oxides are proposed. |
| Funding Organization | National Natural Science Foundation of China |
| DOI | 10.1021/cm901766y |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[50672019] ; National Natural Science Foundation of China[10804024] |
| WOS Research Area | Chemistry ; Materials Science |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000270461700039 |
| Publisher | AMER CHEMICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/98922 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Sui, Yu |
| Affiliation | 1.Harbin Inst Technol, Dept Phys, CCMST, Harbin 150001, Peoples R China 2.Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China 3.Nanyang Technol Univ, Div Phys, Sch Phys & Math Sci, Singapore 637371, Singapore 4.Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, Yang,Sui, Yu,Fan, Hongjin,et al. High Temperature Thermoelectric Response of Electron-Doped CaMnO3[J]. CHEMISTRY OF MATERIALS,2009,21(19):4653-4660. |
| APA | Wang, Yang.,Sui, Yu.,Fan, Hongjin.,Wang, Xianjie.,Su, Yantao.,...&Liu, Xiaoyang.(2009).High Temperature Thermoelectric Response of Electron-Doped CaMnO3.CHEMISTRY OF MATERIALS,21(19),4653-4660. |
| MLA | Wang, Yang,et al."High Temperature Thermoelectric Response of Electron-Doped CaMnO3".CHEMISTRY OF MATERIALS 21.19(2009):4653-4660. |
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